About the introduction of 45 steel quenching hardness, what are the chemical components?

45 steel is widely used. For example, in the field of bearing and abrasive tool repair, it is widely used in these places due to the hardness characteristics of its products, and is deeply loved by people. The person in charge of Kehua Induction Heating Equipment Factory will tell you about the quenching of 45 steel. An introduction to the hardness, what are the chemical components? 45 steel quenching hardness 1. 45 steel processing requires 45 steel quenching and tempering hardness between HRC20~HRC30; 45 steel quenching hardness between HRC55~58, the limit value can reach HRC62; 45 The steel needs to be placed for 15-20 days before it can be used, because the aging treatment is required to stabilize the performance of the steel. The highest hardness in practical application is HRC55 (high frequency quenching HRC58). 45 steel is high-quality carbon structural steel, with low hardness and easy cutting. It is often used in molds as templates, stubs, guide posts, etc., but requires heat treatment. 2. Quenching hardness of 45 steel 1. Before tempering of No. 45 steel after quenching, the hardness is greater than HRC55 (up to HRC62) as qualified. The highest hardness in practical application is HRC55 (high frequency quenching HRC58). 2. Do not use the heat treatment process of carburizing and quenching for No. 45 steel. The hardness of No. 45 steel quenched and tempered parts after quenching should reach HRC56~59. The possibility of large cross-section is lower, but it cannot be lower than HRC48. Otherwise, it means that the workpiece has not been fully quenched, and sorbite or even ferrite may appear in the structure. Body tissue, which remains in the matrix through tempering and cannot achieve the purpose of tempering. 3. The chemical composition of No. 45 steel contains carbon (C) content: 0.42~0.50%, Si (silicon) content is 0.17~0.37%, Mn (manganese) content is 0.50~0.80%, Cr (chromium) content is ≤0.25%, S (Sulfur) content: ≤0.035 % P (phosphorus): ≤0.035% Ni (nickel) content ≤0.30%, Cu (copper) content ≤0.25%. The density of No. 45 steel is 7.85g/cm3, and the elastic modulus is 210GPa. Quenching hardness of 45 steel What is the quenching hardness of 45 steel? What are the internal chemical components? I believe that with the help of the above, everyone has a certain understanding. If you are still interested in it, you may wish to consult the professional technicians of Kehua Induction Heating Equipment.
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