| 摘要: |
| 从焊接性和焊接接头使用性能两个方面入手,结合焊接接头的硬度、拉伸和冲击韧度的测试,对X80管线钢的焊接性能进行了试验分析。结果表明,焊接热影响区的性能发生了较大变化,其中粗晶区出现硬化脆化现象,并导致韧度下降,而不完全重结晶区和回火区则存在一个软化区。通过组织分析,对焊接热影响区的组织状态对焊接接头力学性能的影响进行了讨论。 |
| 关键词: 管线钢 硬化 软化 高匹配 |
| DOI： |
| 分类号: |
| 基金项目:陕西省教育厅自然科学基金资助项目(01JK134) |
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| Analysis of weldability of X80 pipeline steel |
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ZHANG Min1, YAO Cheng-wu1, NIE Bin-ying2
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1.School of Material Science and Engineering, Xi'an University of Technology, Xi'an 710048, China;2.Yichun University, Jiangxi Yichun 336000, China
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| Abstract: |
| The mechanical properties and weldabilities of X80 pipeline steel were investigated by testing hardness,tensile strength and impact toughness in this paper.The result showed that the toughness of CGHAZ decreased because of the hardening and embrittling substance appeared in coarse-grained heat affected zone(CGHAZ),and there was a softening zone between the intercritical heat affected zone(ICHAZ) and the subcritical heat affected zone(SCHAZ).The effect of the organization on X80 mechanical properties was discussed also. |
| Key words: pipeline steel hardening softening overmatching |
