稀土改性超高强度耐磨钢的热处理工艺
发布时间：2018-08-17 11:01
【摘要】：以自主设计的稀土改性Si-Mn-B系贝氏体-马氏体复相耐磨钢为研究对象,利用正交试验研究了不同淬火温度、淬火保温时间、回火温度、回火时间对材料强度、冲击功的影响,以确定最佳热处理工艺,并利用XRD、OM、SEM、TEM方法对其最佳热处理工艺组织进行分析。结果表明:淬火温度对抗拉强度影响最大,回火温度对屈服强度的影响最大,淬火保温时间对冲击功的影响最大。最优热处理方案为:900℃×1.5 h油淬+300℃×3 h回火处理。按此方案热处理后有较好的强韧配合:抗拉强度为1903 MPa,屈服强度为1591 MPa,洛氏硬度为51.4 HRC,无缺口冲击功为267 J。采用彩色金相-化学腐蚀法,组织为下贝氏体(49.6%)、板条马氏体(43.9%)和少量残留奥氏体(6.5%)。
[Abstract]:The effects of quenching temperature, holding time, tempering temperature and tempering time on the strength and impact work of Si-Mn-B modified bainitic martensite wear resistant steel were studied by orthogonal test. In order to determine the optimum heat treatment process, the structure of the optimum heat treatment process was analyzed by means of XRDX OMU SEMX TEM method. The results show that quenching temperature has the greatest influence on tensile strength, tempering temperature on yield strength and quenching time on impact work. The optimal heat treatment scheme is oil quenching at 900 鈩，
本文编号：2187395
[Abstract]:The effects of quenching temperature, holding time, tempering temperature and tempering time on the strength and impact work of Si-Mn-B modified bainitic martensite wear resistant steel were studied by orthogonal test. In order to determine the optimum heat treatment process, the structure of the optimum heat treatment process was analyzed by means of XRDX OMU SEMX TEM method. The results show that quenching temperature has the greatest influence on tensile strength, tempering temperature on yield strength and quenching time on impact work. The optimal heat treatment scheme is oil quenching at 900 鈩，
本文编号：2187395
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