Cast steel and method for preparing same

Specific Example 1

[0010] This specific embodiment is a cast steel containing the following chemical components by weight percentage: C: 0.21%, Si: 0.42%, Mn: 1.06%, Ni: 0.49%, Cr: 0.16%, Mo: 0.04%, P= 0.023%, S=0.020%, the balance is iron, and the carbon equivalent is 0.458%.

[0011] The preparation method of the low-alloy cast steel in this specific embodiment includes the following steps: 1. According to the chemical composition range given, use scrap steel and pig iron as ingredients; 2. Load the prepared materials into an electric arc furnace for smelting and smelting During the process, ferrosilicon, ferromanganese, electrolytic nickel, and ferrochrome are added to adjust the chemical composition; 3. The molten steel obtained by smelting is poured into castings; 4. Normalizing treatment. To measure, its mechanical properties are: σ b =576Mpa,σ s =371Mpa, δ=19.8%, Brinell hardness HB=171.

Specific Example 2

[0012] This specific embodiment is a cast steel containing the following chemical components by weight percentage: C: 0.19%, Si: 0.40%, Mn: 1.10%, Ni: 0.48%, Cr: 0.12%, Mo: 0.04%, P= 0.026%, S = 0.022%, the balance is iron, and the carbon equivalent is 0.436%.

[0013] The preparation method of the low-alloy cast steel in this specific embodiment includes the following steps: 1. According to the chemical composition range given, use scrap steel and pig iron as ingredients; 2. Load the prepared materials into an electric arc furnace for smelting and smelting During the process, ferrosilicon, ferromanganese, electrolytic nickel, and ferrochrome are added to adjust the chemical composition; 3. The molten steel obtained by smelting is poured into castings; 4. Normalizing treatment. To measure, its mechanical properties are: σ b =573Mpa,σ s =375Mpa, δ=20.4%, Brinell hardness HB=166.