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首页> 外国专利> UNTEMPERED STEEL FOR HOT CASTING, HOT-CASTED UNTEMPERED ARTICLE AND METHOD FOR PRODUCING SAME

UNTEMPERED STEEL FOR HOT CASTING, HOT-CASTED UNTEMPERED ARTICLE AND METHOD FOR PRODUCING SAME

机译：用于热铸的非调质钢，热铸的非调质制品及其生产方法

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摘要

The purpose of the present invention is to provide: an untempered steel for hot casting which is available in induction hardening; a hot-casted untempered article, in which the structure therein is controlled in the process of cooling following the hot-casting so as to prevent lowering in machinability associated with high strength, thereby improving fatigue strength; and a method for producing the same. The steel according to the present invention is characterized by comprising, in terms of mass%: 0.45-0.60% of C; 0.02-0.15% of Si; 1.50-3.00% of Mn; 0.0002-0.150% of P; 0.001-0.200% of S; 0.02-1.00% of Cr; 0.001-0.300% of Al; 0.01-0.30% of V; 0.03-1.00% of Mo; 0.0020-0.0070% of N; and the balance being Fe and unavoidable impurities. The hot-casted untempered article, which can be induction-hardened, having the aforesaid steel composition, comprising a bainitic structure amounting to 95% or greater, in terms of area, of the steel structure, and containing Mo carbonitride dispersed in the steel, and the method for producing the same.
机译：本发明的目的是提供：一种可用于感应淬火的用于热浇铸的未回火钢; 1，一种热铸未回火制品，其中在热铸之后的冷却过程中控制其中的结构，以防止与高强度相关的可加工性降低，从而改善疲劳强度;及其制造方法。根据本发明的钢的特征在于，以质量％计包含0.45-0.60％的C;和硅的0.02-0.15％; Mn 1.50-3.00％; P的0.0002-0.150％; S的0.001-0.200％; Cr 0.02-1.00％;铝的0.001-0.300％; V的0.01-0.30％;钼的0.03-1.00％; N的0.0020-0.0070％;其余为铁和不可避免的杂质。具有上述钢组成的可感应淬火的热锻未回火制品，其贝氏体组织占该钢组织的面积的95％以上，并且含有分散在该钢中的碳氮化钼，及其制造方法。

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