Category Archives: About Titanium

Red Titanium Bolts

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Red Titanium Bolts

Usually titanium bolts,titanium springs and other titanium parts usually colored by anodizing and PVD coating,but both of these two coloring ways can’t do red color even after many years researching.

But now we have special coloring process to do red color for all of the titanium parts.Not only it has beautiful red colors,it has below advantages for the red color coating.

1. High hardness

2. Strong binding force and permeability

3. Excellent corrosion resistance

4. Good Color uniformity

After long time testing,it is proved that the red color is feasibility.The color is tough and won’t get faded or cracked easily.Cost is reasonable and coloring speed is fast.

But the red color needs higher quality for a batch to color.For example 800pcs titanium bolts.

Titanium Bolts VS Steel Bolts

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Titanium Bolts VS Steel Bolts

Titanium Bolts has many advantages which steel bolts can’t match.Below are the advantages of titanium bolts compared with steel bolts.

flange titanium bolt

1. Low Density and High Strength

The density of titanium is 4.51g/cm³, which is higher than aluminum but much lower than steel, copper and nickel. Compared with steel bolts, titanium bolts can save 40% weight.

The tensile strength of the most common titanium alloy grade 5 can reach a minimum of 895mpa, so the strength of titanium bolts is much higher than that of stainless steel bolts. For ordinary pure titanium, such as grade 2, the tensile strength is lower than that of stainless steel bolts.

2. Excellent Corrosion Resistance

Titanium is very stable in many media, such as titanium in oxidizing, neutral and weak reducing media is highly resistant to corrosion. So titanium bolts are widely used in chemical industry.

3. Heat Resistance and Low Temperature Resistance

The titanium bolts can be used for a long time at 600 ℃ or higher. Titanium alloy TA7 (ti-5al-2.5sn), Grade 5 (Ti-6Al-4V) and Ti-2.5Zr-1.5Mo are representative of low-temperature titanium alloy. They maintain good ductility and toughness at low temperature of – 196-253 ℃ and avoid cold brittleness of metal. They are ideal materials for low-temperature vessels, tanks and other equipment.

4. Non Magnetic and Non-Toxic

Titanium is a non-magnetic metal and will not be magnetized in a large magnetic field. Titanium bolts have been widely used in the fields of medical treatment and electronic industry.

5. Biocompatibility

Titanium Bolts can also have good compatibility with human tissues and blood even in the human body. At present, titanium is mainly used in: heart stents, intramedullary nails, implant teeth, therapeutic devices and some physical therapy equipment with more contact with the human body. The fastener parts in these equipment must also be titanium fasteners.

surgical titanium nail

6. Can be anodized to many colors

Compared with Steel bolts,titanium bolts can be anodized to many colors including Gold,Blue,Black,Purple,Green and Rainnow colors.

colored disc brake pads thread pins

Titanium bolts for aircraft carrier

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Aircraft carrier is a symbol of a country’s overseas national strength. It not only represents a country’s comprehensive military strength, but also reflects a country’s comprehensive national strength. The real thing is a “toy” that can only be played by a big country.

At present, the largest surface warship in the world is also very expensive. For example, the cost of the U.S. Ford class aircraft carrier is close to 10 billion dollars. Where is the high cost of the aircraft carrier?

titanium bolt

Due to the special environment of the aircraft carrier, there are special requirements for the steel used in the construction of the aircraft carrier. Because the aircraft carrier is connected in sections, it needs a large number of connecting mechanical parts rivets and screws to connect in sections, which requires countless bolts to fix it. In order to meet the requirements of various performance of the aircraft carrier, most of the screws on the aircraft carrier are made of titanium alloy, which is made of titanium alloy The screws are widely used in aerospace and surface ships. They are the most basic and indispensable parts of modern military equipment.

Aircraft carrier Titanium bolt requirements

When the aircraft carrier has been driving in the ocean for a long time, it has high requirements for bolts in the face of seawater corrosion, two-stage equator, marine natural disasters and non-magnetic requirements. Unlike ordinary bolts, ordinary bolts can not meet the requirements of marine corrosiveness, impact resistance and high temperature resistance. Moreover, the fatal defect of ordinary bolts is that they are magnetic, which will form magnetism for a long time The field interferes with normal operation of aircraft carrier.

Titanium alloy bolts can meet the special requirements of aircraft carrier, which is an important reason for the use of titanium alloy in aircraft carrier screws.

titanium screws

Titanium alloy has four advantages over other types of steel

  1. The weight of titanium alloy is only 57% of that of steel, which can greatly reduce the weight of aircraft carrier, save more fuel and improve the flexibility of ship at sea.
  2. The corrosion resistance of titanium alloy is more than three times stronger than that of steel, especially the resistance to chloride ion, which can greatly guarantee the safety of the hull.
  3. Titanium alloy material is non-magnetic and used on aircraft carrier, which is conducive to absorbing radar wave, playing a certain role in stealth, not easily detected by enemy, and avoiding the formation of strike force on aircraft carrier in advance.

Titanium alloy has strong resistance capacity. The holes connecting bolts or rivets on the aircraft carrier can only be drilled at certain positions after technical verification. Each hole must bear more force or torque, which will be borne by the bolts finally.

aircraft carrier titanium

Manufacturing difficulty of titanium alloy bolt

Generally, bolts need to be processed in batches, but titanium material is very difficult to process, manufacturing is very difficult, and the scrap rate of batch manufacturing is very high. The machine tools and cutting tools used for processing are strictly required, and the failure of both standards can affect the accuracy of bolts.

Bolts are widely distributed on aircraft carriers, and the technical requirements for bolts in various parts are different. When choosing the cutting tool material for cutting titanium alloy, it is required to have high variable strength, high hardness, good toughness, good thermal hardness, good wear resistance, and good heat dissipation. Moreover, it is not allowed to use the cutting tool material containing titanium, because the cutting tool material containing titanium is easy to be compatible with titanium alloy under high temperature, which intensifies the cutting tool Wear.

This Article is from Baoji HOSN Titanium Co., Ltd.

www.hosnti.com

[email protected]

Several Surface Treatment Methods of Titanium Bolt

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Several Surface Treatment Methods of Titanium Bolt

The appearance of titanium bolt is like steel, with silver white luster. It is a transition metal. Titanium bolt has high strength, small density, high hardness, high melting point and strong corrosion resistance. Due to its stable chemical properties, it has good high temperature resistance, low temperature resistance, strong acid resistance, strong alkali resistance, high strength and low density.

bicycle titanium bolts

The color of titanium bolt is silver gray without any surface treatment, as shown in the following photo,

titanium bolts without finish treatment

Sometimes, we find many colorful titanium bolts on top grade bicycles or cars. The surface of these bolts is so bright and colorful after some surface treatment. Today, we will briefly introduce the surface treatment of titanium bolts

Removal of reaction layer on the surface of titanium bolt

Due to the low density of titanium bolt, the inertia of titanium liquid flow is small, and the flow performance is poor. In the process of production, it is easy to cause defects such as pores on the surface and inside of titanium bolt. In order to make the titanium bolt bright and colorful, it is necessary to remove the reaction layer on the surface of the titanium bolt. There are two ways to remove the reaction layer on the surface of titanium bolt

1) Sand blasting: sand grains are blasted on the surface of titanium bolts by sand blasting, resulting in intense sparks. When the temperature rises, the surface of titanium bolts will react, forming secondary pollution and affecting the surface quality. The time is 15-30 seconds, only removing the sand sticking, surface sintering layer and part of oxide layer on the casting surface. The rest of the surface reaction layer structure should be removed quickly by chemical pickling.

2) Acid pickling: the surface reaction layer of titanium bolt can be removed quickly and effectively by the method of cleaning and acid pickling, and other metal elements will not be polluted.

Treatment of casting defects of titanium bolts

In the production process of titanium bolts, there may be internal porosity and shrinkage internal defects: at this time, it can be removed by hot isostatic pressing technology.

Grinding and polishing

1) Titanium bolts have high chemical reactivity, low thermal conductivity, high viscosity, low mechanical grinding ratio, and are easy to react with abrasive Abrasives. Ordinary abrasives are not suitable for the grinding and polishing of titanium screws. It is better to use super hard abrasives with good thermal conductivity, such as diamond, CBN, etc,

mirro polished titanium chemical polishing

2) Chemical polishing: chemical polishing is to achieve the purpose of leveling and polishing through the oxidation-reduction reaction of metal in the chemical medium. It has the advantages that chemical polishing has nothing to do with the hardness of metal, polishing area and structure shape. All parts contacting with polishing fluid are polished without special and complex equipment. It is easy to operate and is more suitable for polishing of precision titanium screws with complex structure. However, chemical polishing is difficult to control in process parameters. It is required to have good polishing effect on titanium bolts without affecting the precision of titanium bolts.

mirro polished titanium chemical polishing

Coloring

In order to increase the aesthetic feeling of titanium bolt, make the surface of titanium bolt more colorful and bright, and prevent the continuous oxidation of titanium bolt under natural conditions. General bolt manufacturers will adopt surface nitriding treatment, atmospheric oxidation and anodizing surface coloring treatment to form a light yellow or golden yellow surface and improve the aesthetic feeling of titanium bolts. The anodizing method uses the interference of titanium oxide film on the light to produce natural color, which can form colorful color on the titanium surface by changing the cell voltage.

colored titanium bolts

Of course, titanium bolt customization is mainly based on the different needs of users for different surface treatment methods. The practical application environment of titanium bolt is the main reason for the surface treatment of titanium bolt, which is just the conventional treatment of titanium screw fastener.

This Article from Baoji HOSN Titanium Co., Ltd.

www.hosnti.com

Titanium Springs VS SLS Springs

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Titanium Springs VS SLS Springs

What is SLS springs

SLS is also called Super Light Springs,it is made from Super Alloy Steels.Compared with Normal Steel springs,it can designed with smaller volume and much lower weight just like titanium springs.And compared with titanium springs,some SLS springs has lower weight than the normal titanium springs,but some SLS springs weight is higher.For example as below chart.

We can see that the 350×2.75″ SLS spring has much lower weight than titanium Grade 5 springs;the weight of the 450×2.75″ SLS spring is even the same as the titanium spring;the titanium 500×2.75″ spring has even 15g lower weight than SLS springs.So not all SLS springs will has lower weight than titanium Grade 5 springs.

So anybody who want rearshock springs for your bicycles,you can compare the weight of the titanium springs and SLS springs at first.

I read an artical from Pinkbike.com,the SLS spring sold at 130USD/piece. And many other titanium springs are sold with very high prices.

For us,we keep reserching and producing titanium springs for around 10 years,we also produce titanium springs for our customers,we sell our titanium springs at much lower prices and high quality. Our titanium Grade 5 spring has much lower price than the SLS springs.Titanium springs also has below advantages which SLS springs can’t compare.

1. Titanium Springs can be anodized to many colors including Gold,Blue,Purple,Green,Rainbow colors. And they can be PVD coated to Black,Oilslick and Burnt colors.

2. Titanium has excellent corrosion resistance features and it won’t get rusty.But SLS springs usually have to be plastic coated or Painted to avoid its finish get rusty.

Spring rates of titanium springs

Also people think that titanium springs don’t has accurate spring rates as it demanded.Our answer is no.The spring rates has tolerances,but tolerances is small.The spring rates tolerances comes from tolerances of spring sizes including wire diameter,inner diameter and numbers of coils.For us,we has many years experiences on titanium spring designing and production,we know how to control the accuracy of the titanium springs.And all springs will be tested before shipping to customers.

Beta-C titanium springs

Except Grade 5 titanium springs,we also produce Beta-C springs.The Beta-C material has much more excellent features than Grade 5 material,after Solution & Aging heat treatment,its tensile strength even can reach to more than 1300Mpa.It can be designed with smaller wire diameter and less coils,its weight will be more lighter than Grade 5 springs.But its cost is very high.Below are the reasons why Beta-C spring has much higher cost than Grade 5 springs.

1. Its raw material cost is higher than Grade 5 titanium raw material

2. Spring wire production cost is much higher than Grade 5

3. The rates of finished products is lower than Grade 5 springs.Because when coiling Beta-C spring wire,it get broken easily and its finish will leave cracks after coiling.

4. Heat Treatment of Beta-C spring cost is high.

Super Grade 5 Titanium Springs

Recently,we researched an super titanium Grade 5 spring.This spring is still made from normal titanium alloy Grade 5 material,but designed with smaller spring wire diameter and less coils,it can reduce more weight than normal Grade 5 titanium springs.Though weight is reduced,but it still hold up the excellent features of titanium springs.It is proved by longer time riding. Just because the cost of “special treatment” is much higher than normal Grade 5 springs,so it has some higher prices than Grade 5 springs.But its price is still much lower than Beta-C titanium springs.Below is an example of comparison of different titanium springs.

super grade 5 titanium springs

From this example,we can see that the super Grade 5 titanium spring has the same weight as beta-C titanium springs,both of them has much lower weight than normal Grade 5 springs.Anyway,it is just an example,it is not means all super Grade 5 titanium springs has even the same weight as Beta-C springs.So before choosing a shock spring,you can consider much including spring weights,colors,and prices at first and then choose the fittest spring for your bikes.

Baoji HOSN Titanium Co., Ltd. is a company specialized with titanium springs design and production.We supply custom services for the titanium springs,and our MOQ is 1 piece.So just contact us if you want titanium spring for your bike.

Website: www.hosnti.com

Email: [email protected]

Differences of titanium black color which colored by anodizing and PVD coating

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Differences of titanium black color which colored by anodizing and PVD coating

Usually customers want titanium fasteners or other titanium parts in black colors,now there are two kinds of technology to do black color,one is anodizing and the other is PVD coating.

1. Though both are black coloring,but after coloring,the black color has some differences.The black color by anodizing is light black or can be called gray black.The black color by PVD coating is dark black or can be called the real black.Just view below compared photos.

the titanium retainer black color is colored by PVD coatinng the titanium bolt black color is colored by anodizing

2. For the PVD coated black color,it can raise finish hardness of the titanium parts,its finish hardness can reach to HV2000. But for the anodizing,it is just an oxidation film,it can’t raise finish hardness of titanium parts.

3. The anodized black color will generate purple speckles for a period,and until now,the coloring factory can’t find the reasons.But for the PVD coated black titanium fasteners,its color won’t get changed even after long time using.

this titanium part has problem black color

4. Another difference is the PVD coated black color will have some higher coloring fees than anodized black color.But it is worth to do black color by PVD coating.

So we suggest all of our customers purchase PVD coating black colored titanium fasteners to avoid problem of color changing of anodized black color.

This article is from Baoji HOSN Titanium Co., Ltd. Website: www.hosnti.com Email: [email protected]

Problem for Black colored Titanium Bolts

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Problem for Black colored Titanium Bolts

These are the black anodized titanium bolts,really don’t know how it happened.After negotiating with our anodizing factory,usually this problem will happen for black coloring by anodizing.Before shipping,all looks good,but don’t know what happened,there is purple color generated.So in the future,for all black colors,we will color them by PVD coating.And we suggest all of you,if you order titanium products with black color,you should buy them in PVD coated black color.

Titanium Retainers VS Steel Retainers

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Titanium Retainers VS Steel Retainers

Now titanium retainers are widely used for engine of Automobiles,Motorcycles and Snowmobiles,etc.Titanium retainers has its incomparable advantages than steel retainers.But also it has its shortcoming compared with steel retainers.

Titanium Retainer Advantages

1.We can get excellent strength,wear resistance and extremely durable at 60% weight of steel retainers.

titanium retainers vs steel retainers

2. Titanium Retainers can help raise the RPM,Gain Speed and Power on basic of weight saving.

3. Titanium Retainers perform flawlessly and without compromise from a standing idle to the most extreme RPM.

4. It can be anodized to many colors including Gold,Blue,Black,Purple,Green and Rainbow colors. And also it can be nitrided to Black,Gold,Burnt Blue and Oilslick colors.Not only the nitriding can make colors,but also it can enhence finish hardness of titanium retainers.

titanium valve spring retainer

Titanium Retainer Shortcomings

I think the only one shortcoming of titanium retainers is its cost is much higher than steel ones.There are some factors which affect the cost of the titanium retainers

  1. The titanium material cost is much higher than steel.Usually the titanium retainer raw material (Titanium Rods) cost is around 27.5USD/kg.But steel rods may cost around 4.5USD/kg.
  2. Titanium retainers needs produced by 100% CNC turning,and titanium material is hard to machine,so its machining fees is high.
  3. The market don’t have much needs for titanium retainers,there is no batch production for titanium retainers,so its cost can’t be reduced.

Titanium Retainers Manufacturer

Baoji HOSN Titanium Co., Ltd. specialized with titanium valve spring retainers production for more than 10 years,and they will be precision CNC machined from aerospace titanium Grade 5(Ti-6Al-4V) materials.

Also we control them in high precision tolerance for consistent installation.

We accept Customization services for our titanium retainers,below are part of our titanium retainers which we customized for our clients.

titanium valve spring retainers

A way to figure out the quality of the raw material of your titanium bolts

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Firstly,please check below photo,all can figure out that the bolt on left has bright gold finish and the right one has matte gold finish.All are anodized colored at the same time.Can you figure out which titanium bolt has high quality raw material? Answer is the left one.The right one is produced from the wasted titanium alloy Grade 5 and its chemical composition is not qualified.

It is an easy way to distinguish raw material quality of titanium bolts good or bad.

A photo of gold titanium bolts with different finish quality