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模具鋼材5CrMnMo是在中碳鋼的基礎(chǔ)上主要加入Cr、Mn、Mo三元素而研制成的，也可看作把5CrNiMo鋼中的Ni元素由Mn元素取代而形成的。該鋼是熱作模具鋼，除淬透性，耐熱疲勞性稍差外，5CrMnMo鋼具有與5CrNiMo鋼類似的性能，淬透性稍差·此鋼適于制作要求具有較高強(qiáng)度和高耐磨性的各種類型鍛模·要求韌性較高時(shí)，可采用電渣重熔鋼· 5CrMnMo鋼中碳含量保持在0.40%~0.60%，可獲得較高的強(qiáng)度與耐熱疲勞強(qiáng)度、一定的硬度與耐磨性、良好的韌性鋼與導(dǎo)熱性。

化學(xué)成份

碳 C ：0.50～0.60

硅 Si：0.25～0.60

錳 Mn：1.20～1.60

硫 S ：≤0.030

磷 P ：≤0.030

鉻 Cr：0.60～0.90

鎳 Ni：允許殘余含量≤0.25

銅 Cu：允許殘余含量≤0.30

鉬 Mo：0.15～0.30

硬度 ：退火,241～197HB,壓痕直徑3.9～4.3mm

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The mold steel 5CrMnMo is developed by adding mainly three elements of Cr, Mn and Mo on the basis of medium carbon steel, and can also be regarded as the substitution of Ni element in 5CrNiMo steel by Mn element. The steel is a hot work die steel. In addition to hardenability and poor thermal fatigue resistance, 5CrMnMo steel has similar properties to 5CrNiMo steel, and the hardenability is slightly poor. This steel is suitable for high strength and high resistance. Various types of forging die for grinding. When high toughness is required, the carbon content of electroslag remelted steel·5CrMnMo steel can be kept at 0.40%~0.60%, and high strength and thermal fatigue strength can be obtained. Hardness and wear resistance, good toughness steel and thermal conductivity.

chemical composition

Carbon C: 0.50~0.60

Silicon Si: 0.25 ~ 0.60

Manganese Mn: 1.20~1.60

Sulfur S :≤0.030

Phosphorus P :≤0.030

Chromium Cr: 0.60 to 0.90

Nickel Ni: Allowable residual content ≤ 0.25

Copper Cu: Allowable residual content ≤ 0.30

Molybdenum Mo: 0.15~0.30

Hardness: Annealed, 241 ~ 197HB, indentation diameter 3.9 ~ 4.3mm