李翼杨忠民
金属学报
doi:10.3724/SP.J.1037.2010.00284
通过在Gleeble1500热模拟试验机上的模拟加热和冷却实验, 研究了连续冷却条件下不同含量的V对高碳钢组织转变的影响, 并测定了相关力学性能. 实验结果表明:V的加入降低了高碳钢珠光体转变温度, 推迟了珠光体转变的CCT曲线, 细化了珠光体片层, 增加了高碳钢珠光体组织的强度和硬度,从V降低珠光体转变开始温度和降低珠光体团长大速率两个方面分析了V降低珠光体平均转变温度的原因. 实验还观察到在1 ℃/s冷速下高碳钢原奥氏体晶界上存在少量铁素体, 加入0.1%V对晶界铁素体的析出有抑制作用,而加入0.2%V到0.3%V则促进铁素体在晶界明显析出, 相关力学性能的测定表明晶界铁素体的出现改善了高碳钢塑性.
关键词:
V
,
high carbon steel
,
pearlite
,
interlamellar spacing
,
ferrite on grain boundary
余万华
,
高山
,
刘飞
,
刘力哲
,
孙理
,
刘澄
材料热处理学报
对80级帘线钢C82DA和90级帘线钢C92DA化学成分进行检测,分析化学成分中合金元素差异对其相变的影响.采用光学显微镜、扫描电镜(SEM)、热膨胀仪和显微硬度仪,对比研究C82DA和C92DA的相变规律;相同热处理条件下的相变点、显微组织、珠光体片层间距;以及通过等温转变实验得到的相变动力学方程,并对参数n值和k值关系进行对比.结果表明:C92DA钢中的C、Si、Cr含量要高于C82DA,因此C92DA的片层间距要比C82DA细密,C92DA的n值要比C82DA大.这些结果对制定生产工艺和构建在线质量预报模型提供了基础数据.
关键词:
帘线钢
,
高碳钢
,
冷速
,
显微组织
,
相变模型
M. H. Guo
,
D. C. Shao
,
Z. G Dong and J. C Yang National Key Laboratory Advanced Welding Production Technology
,
Harbin institute of Technology
,
Harbin 150001
,
China
金属学报(英文版)
Manuscript received 30 July 1999 Abstract The shielded metal arc welding (SMAW) of a manganese steel part as a crossing of railway track to a carbon steel part as the rails of the railroad is the welding of dissimilar steel. It are was known that it is not possible to the the rail of railroad directly to the cross- ing of railway track made from a steel containing about 14% of manganese (wt. ) because of so many differences between the two kinds of steels such as composition, microstructure,mechanical properties and weldability.A method was used to solve the problem by presetting an intermediate layer on each side of the joint and other special procedures were used.The result of test indicated that a good weld joint was obtained.
关键词:
high manganese steel
,
null
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null
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