WEAR-RESISTANT CAST STEEL AND METHOD FOR PRODUCING THE SAME

• Main Authors: HINENO MINORU, NAKAKUBO TOKUJI, SUENO HIDEKAZU, SHIRAI ATSUHIKO
• Format: Patent
• Language: English; Japanese
• Published: 04.07.2024
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

To provide a wear-resistant cast steel that can ensure toughness and hardness without a tempering step and a method for producing the same.SOLUTION: A wear-resistant cast steel contains, in mass%, C: 0.27%-0.36%, Si: 0.10%-0.50%, Mn: 0.30%-0.70%, P: 0.04% or less, S: 0.04% or less, Ni: 1.4%-1.9%, Cr: 0.4%-1.0%, Mo: 0.2%-0.3%, Al: 0.1% or less, with the balance being Fe and impurities. The wear-resistant cast steel has the sections that have a product thickness equal to or greater than one inch. The wear-resistant cast steel has an HB hardness of 421-560 and a Charpy impact value of 20-40 J/cm2.SELECTED DRAWING: Figure 1 【課題】本発明は、焼戻し工程を実施しなくても、靭性と硬度を確保できる耐摩耗鋳鋼及びその製造方法を提供する。【解決手段】本発明の耐摩耗鋳鋼は、質量％にて、Ｃ：０．２７％～０．３６％、Ｓｉ：０．１０％～０．５０％、Ｍｎ：０．３０％～０．７０％、Ｐ：０．０４％以下、Ｓ：０．０４％以下、Ｎｉ：１．４％～１．９％、Ｃｒ：０．４％～１．０％、Ｍｏ：０．２％～０．３％、Ａｌ：０．１％以下を含み、残部Ｆｅ及び不純物からなり、製品肉厚が１インチ以上の部分を有し、ＨＢ硬さが４２１～５６０、シャルピー衝撃値：２０～４０Ｊ／ｃｍ２である。【選択図】図１