Titanium alloys What is the difference between titanium and stainless steel?

Titanium alloy is an important structural metal with high strength, good corrosion resistance, and high heat resistance. Mainly used for making aircraft, engine, compressor and other components. Then, what are the types of titanium alloys ? What is the difference between titanium and stainless steel? Let's look at them together with Xiaobian.

First, the type of titanium alloy

At room temperature, titanium alloys have three matrix structures. Titanium can be divided into the following three categories: alpha alloys, (alpha+beta) alloys, and beta alloys. In China, they are represented by TA, TC and TB respectively.

1. Alpha alloy

It is a single-phase alloy composed of α-solid solution. Whether it is at normal temperature or at a higher practical application temperature, it is an α-phase. The structure is stable, the wear resistance is higher than that of pure titanium, and the anti-oxidation ability is strong. At a temperature of 500°C to 600°C, its strength and creep resistance are still maintained, but it cannot be strengthened by heat treatment, and room temperature strength is not high.

2, β alloy

It is a single-phase alloy composed of β-phase solid solution. It has high strength without heat treatment. After quenching and aging, the alloy is further strengthened. The strength at room temperature can reach 1372 to 1666 MPa. However, the thermal stability is poor and should not be used at high temperatures. .

3, α + β alloy

It is a dual-phase alloy with good overall performance, good tissue stability, good toughness, ductility, and high temperature deformation properties. It can be well processed by hot pressing and can be quenched and aged to strengthen the alloy. After heat treatment, the strength is about 50% to 100% higher than that of the annealed condition, and the high temperature strength is high. It can work for a long time at a temperature of 400°C to 500°C, and its thermal stability is inferior to α alloy.

Second, the difference between titanium and stainless steel

1, there is a difference in color. Titanium is a little dark, reveals a cool color, and feels cool. Titanium is darker than steel. Steel is white and pale. The two colors are very visible.

2, there can be used to distinguish between nitric acid bubble. Titanium does not react, and a strong reaction occurs when the stainless steel is put down.

3. Titanium can mark gray and black on the tiles, but stainless steel cannot mark them.

4, titanium corrosion resistance: easy to form a dense oxide film below 550 °C, it is not easily further oxidation, the air, sea water, steam and some acid, alkali, soft medium have a higher resistance to loss of corrosion .

5, titanium heat strength: titanium alloy melting point of 1660 °C, higher than iron, with high thermal strength, can be below 550 °C things, while emerging at low temperatures better toughness.

Xiao Bian concludes the statement: The above is the introduction of titanium alloys and the difference between titanium and stainless steel. I hope to increase everyone’s understanding of these metals. In fact, titanium alloys are gradually being used to make people's livelihoods and benefit people's lives. However, these products are still high in price and they are high-priced products, but there is no big loss through learning.

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