热处理工艺对耐磨钢性能的影响
Effect of heat treatment process on properties of wear-resistant steel
王春，杨国权
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作者单位：唐山学院
中文关键字：耐磨钢，热处理工艺，延伸率，断口
英文关键字：Wear-resistant steels, heat treatment, elongation, fracture
中文摘要：摘要：本文以NM400耐磨钢为研究对象，通过拉伸实验和冲击实验分析了热处理工艺对耐磨钢机械性能的影响，结果表明随着回火温度的升高，强度值都有先增后减的变化趋势，而延伸率的变化趋势则是200℃回火比淬火态钢板高，回火温度依次升高，延伸率也是先增后减。冲击结果表明钢板冲击断口形貌主要为大量解理断口或准解理断口，部分试样存在有少量纤维状断口，纤维状断口一般属于钢的正常断口，它表示具有良好的韧性。
英文摘要：Abstract: It is based the wear-resistant steel NM400 to study the effects of heat treatment process on the mechanical properties by tesnsile test and impact test, the results show that the change trend is first increased and then decreased with the tempering temperature increasing. The change trend of elongation also shows the first increase and then decrease with the tempering temperature increasing and the elongation of tempering is higher than that of quenching at 200 ℃. The impact test shows that the fracture morphology is mainly lots of cleavage or quasi-cleavage fracture, and there is some small amount of fibrous fracture which represents a good thoughness