07MnNiCrMoVDR钢焊接接头低温韧性研究
Study on Low-temperature Toughness of 07MnNiCrMoVDR Welded Joint
张丽红1， 陈芙蓉2， 解瑞军2
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作者单位：1.内蒙古机电职业技术学院 冶金与材料工程系，内蒙古 呼和浩特 010070；2.内蒙古工业大学 材料科学与工程学院，内蒙古 呼和浩特 010051
中文关键字：07MnNiCrMoVDR钢；低温韧性；韧脆转变温度
英文关键字： 07MnNiCrMoVDR steel; low-temperature toughness; ductile-brittle transition temperature
中文摘要：以07MnNiCrMoVDR钢及其焊接接头为试验对象，通过冲击试验，分析了温度对焊接接头性能的影响以及韧脆转变温度的确定。试验结果表明，07MnNiCrMoVDR钢焊接接头的低温韧性随着温度的降低而降低；焊接接头各区的韧脆转变温度均低于最低使用温度（-40℃），满足实际工矿的使用要求。
英文摘要：07MnNiCrMoVDR steel and welded joint were studied. The effects of temperature on low-temperature toughness and define ductile-brittle transition temperature of 07MnNiCrMoVDR steel were studied by impact test. The results show that low-temperature toughness of 07MnNiCrMoVDR welded joint decreases with the decrease of temperature. The ductile-brittle transition temperature of welded joint is less than the lowest used temperature (-40℃). So, 07MnNiCrMoVDR steel and welded joint can meet the request of application.