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    孙建阁, 黎振华, 蒋业华, 李大东, 张开华. 低合金高碳钢焊接热影响区的连续冷却转变曲线[J]. 机械工程材料, 2009, 33(1): 17-19.
    引用本文: 孙建阁, 黎振华, 蒋业华, 李大东, 张开华. 低合金高碳钢焊接热影响区的连续冷却转变曲线[J]. 机械工程材料, 2009, 33(1): 17-19.
    shu
    SUN Jian-ge, LI Zhen-hua, JIANG Ye-hua, LI Da-dong, ZHANG Kai-hua. SH-CCT Curves of Low Alloy High Carbon Steel[J]. Materials and Mechanical Engineering, 2009, 33(1): 17-19.
    Citation: SUN Jian-ge, LI Zhen-hua, JIANG Ye-hua, LI Da-dong, ZHANG Kai-hua. SH-CCT Curves of Low Alloy High Carbon Steel[J]. Materials and Mechanical Engineering, 2009, 33(1): 17-19.
    shu

    低合金高碳钢焊接热影响区的连续冷却转变曲线

    SH-CCT Curves of Low Alloy High Carbon Steel

      摘要
    • 摘要: 用Formastor-D型全自动相变测量仪,结合显微组织观察和硬度测量,测定了A、B两种低合金高碳钢焊接热影响区的连续冷却转变(SH-CCT)曲线;分析了合金元素镍对试验钢SH-CCT曲线的影响.结果表明:为保证热影响区为珠光体组织,A、B试验钢在焊后热处理时,t8/5应分别大于300 s 和200 s;B试验钢的珠光体转变区与贝氏体转变区发生分离;镍可推迟奥氏体向珠光体和贝氏体转变,也可降低Ac3和Ms相变点温度.

       

      Abstract: By measuring the continuous cooling transformation curves in heat affected zone(SH-CCT curves) of two kinds of low alloy high carbon test steels A and B at different cooling speeds in Formastor-D phase transformation tester,combined with metallographic analysis and hardness measurements,SH-CCT curves were obtained.The effect of Ni on the SH-CCT curves was analyzed.The results showed that to ensure the heat affected zone being of pearlite,t8/5 should be longer than 300 s and 200 s respectively in the process of heat treatment after welding of test steel A and B.SH-CCT curves of the test steel B had a separation region between the pearlite transformative and bainite transformative.Ni could postpone the transforming from austenitic to pearlite and bainite,and also lower the tempteratures of Ac3 and Ms.

       

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