What is the composition of carbon in stainless steel?
Adjust the hardness, general carbon content, the higher the relative hardness is relatively hard. But no, the higher the better, the carbon content needs to be well controlled. For example, if the welding position is too high carbon, it will lead to brittle weld and easy to crack.
(7) chromium can improve the hardenability and wear resistance of steel, and can improve the corrosion resistance and oxidation resistance of steel(8) vanadium; can refine the grain size of steel, improve the steel strength, toughness and wear resistance. When it is in the high temperature melt into austenite, can increase the hardenability of steel; on the contrary, when it is in the form of carbide exists, it will reduce the hardenability.(9) molybdenum can obviously improve hardenability and heat resistance of steel, prevent temper brittleness, and increase residual magnetism and attractive force(10) titanium can refine the grain structure of steel so as to improve the strength and toughness of steel. In stainless steel, titanium can eliminate or mitigate intergranular corrosion of steel(11) nickel can improve the strength and toughness of steel, and improve the hardenability. When the content is high, it can significantly change some physical properties of steel and alloy, and improve the corrosion resistance of steel(12) boron; when the steel contains a trace of (0.001 - 0.005%) boron, the hardenability of steel can be doubled and raised(13) aluminum can refine the grain structure of steel, restrain the aging of low carbon steel, improve the toughness of steel at low temperature, and can also improve the oxidation resistance of steel, improve the wear resistance and fatigue strength of steel(14) copper; its outstanding function is to improve the atmospheric corrosion resistance of ordinary low alloy steel, especially when used in combination with phosphorus
The quality and performance of steel are determined according to needs, and different elements should be included in different requirements(1) carbon, the higher the carbon content, the higher the hardness, but its plasticity and toughness are worse(2) sulfur is the harmful impurity in steel. The steel with high sulfur content is easy to crack when it is processed by high temperature. It is usually called hot brittleness(3) p; can make the plasticity and toughness of the steel decreased significantly, especially at low temperature is more serious, this phenomenon is called cold brittleness. In high-quality steel, sulfur and phosphorus must be strictly controlled. But on the other hand, sulfur and phosphorus containing high in low carbon steels, can make the cutting easily broken, is benefit to improve the machinability of the steel is.(4) manganese; can improve the strength of steel, can weaken and eliminate the adverse effects of sulfur, and can improve the hardenability of steel, manganese content of high alloy steel (Gao Menggang) has good abrasion resistance and other physical properties.(5) silicon; it can improve the hardness of steel; but the plasticity and toughness decrease; the steel used in the electrician contains a certain amount of silicon, which can improve the soft magnetic properties(6) tungsten can improve the red hardness and heat strength of steel, and can improve the wear resistance of steel
