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1. Carbon; the higher the carbon content, the higher the hardness of the steel, but the worse its plasticity and toughness.
2. Sulfur; it is a harmful impurity in steel. High sulphur steel is brittle and brittle when it is subjected to pressure processing at high temperature.
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 it easy to cutting broken, is beneficial to improve the machinability of the steel is.
4, Mn; 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 the steel, but the plasticity and toughness decrease, and the steel in the electrician contains a certain amount of silicon, which can improve the soft magnetic properties.
6, tungsten; can improve the steel hardness and thermal strength, and can improve the wear resistance of the steel.
7, chromium, can improve the hardenability and wear resistance of steel, and can improve the corrosion resistance and oxidation resistance of steel.
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