| 摘要 |
The machine component or component consists of thermally hardened steel alloy having carbon (0.48-0.55 wt.%), silicon (0.18-0.25 wt.%), manganese (0.35-0.45 wt.%), chromium (4.40-4.70 wt.%), molybdenum (2.90-3.10 wt.%), vanadium (0.72-0.77 wt.%), iron and accompanying elements necessitated by steel production and impurities as remainder. The accompanying elements or impurity elements consist of phosphorus (0.005 wt.%), sulfur (0.001 wt.%), nickel (0.1 wt.%), copper (0.1 wt.%), cobalt (0.1 wt.%), titanium (0.005 wt.%), aluminum (0.01 wt.%), nitrogen (0.003 wt.%) and oxygen (0.002 wt.%). The machine component or component consists of thermally hardened steel alloy having carbon (0.48-0.55 wt.%), silicon (0.18-0.25 wt.%), manganese (0.35-0.45 wt.%), chromium (4.40-4.70 wt.%), molybdenum (2.90-3.10 wt.%), vanadium (0.72-0.77 wt.%), iron and accompanying elements necessitated by steel production and impurities as remainder. The accompanying elements or impurity elements consist of phosphorus (0.005 wt.%), sulfur (0.001 wt.%), nickel (0.1 wt.%), copper (0.1 wt.%), cobalt (0.1 wt.%), titanium (0.005 wt.%), aluminum (0.01 wt.%), nitrogen (0.003 wt.%), oxygen (0.002 wt.%), calcium (0.001 wt.%), magnesium (0.001 wt.%) and tin (0.005 wt.%). The component has a purity degree of steel alloy. The elasticity module of the material is 205000 MPa. The machine component has a tensile strength of greater than 2000 MPa for changing mechanical loads to a temperature of greater than 160[deg] C, and a hardness of greater than 55 [HRC] produced by thermal tempering. |
