Knowledge

The brittleness of stainless steel caused by σ phase can be eliminated by heating or solution treatment above 820°C.

The higher the carbon content in stainless steel, the lower its corrosion resistance.

The role of manganese, an alloying element, in the formation of austenitic stainless steels is about one-half that of nickel, that is, 2% of manganese

The main role of titanium and niobium is to prevent intergranular corrosion of stainless steel.

The carbon content of ferritic stainless steel is generally less than 0.15%, and the chromium content is 13~30%.

Austenitic stainless steel is the most widely used class of heat-resistant steels and stainless steels.

About the heat treatment process of stainless steel.

The purpose of tempering is to eliminate the quenching stress and transform the structure of the steel into a relatively stable state.

Alloying elements can delay the decomposition of iron-carbon supersaturated solid solution, and also have a great influence on the amount of retained

Low temperature temper brittleness is the embrittlement that has already occurred and cannot be eliminated by reheating, so it is also called irrevers

Quenching and tempering of steel are very important and widely used processes in the heat treatment process.

Due to the inherent excellent corrosion resistance of stainless steel, it is often used without any coating, and its bare metal is used directly. In t