X100管线钢焊接接头的显微组织和性能
Microstructure and Property of X100 Pipeline Steel Welded Joint
摘 要
利用光学显微镜、拉伸试验机、冲击试验机及维氏硬度计等对X100管线钢埋弧焊焊接接头的组织及性能进行了研究。结果表明: X100管线钢焊接接头粗晶区组织为粗大的先共析铁素体和粒状贝氏体, 细晶区主要为细小的铁素体, 不完全重结晶区为细晶铁素体、粗晶针状铁素体和粒状贝氏体混合组织; 接头的抗拉强度平均值为576 MPa, 达到母材的80%, 拉伸试样断裂于焊缝处; 接头焊缝、热影响区的冲击功分别为198 J和259 J; 焊缝区最高硬度为316 HV, 在临界温度热影响区(ICHAZ)和亚临界温度热影响区(SCHAZ)之间存在软化现象。
埋弧焊
焊接接头
X100 line pipe
submerged arc welding
welded joint
Abstract
Using optical microscopy, tensile, impact and hardness tests, the microstructure and property of the welded X100 pipeline steel joint were studied. The results show that the microstructure was coarse proeutectoid ferrite and granular bainite in the coarse-grained zone of the joint, fine ferrite in the fine-grained region, and fine-grained ferrite, coarse-grained acicular ferrite and granular bainite in the incomplete recrystallization region. The average tensile strength of the joint was 576 MPa, which got to about 80% of the base materials. The tensile fracture occurred in the welding seam. The impact energy in the welding seam and heat affected zone were 198 J and 259 J, respectively. The maximum hardness value was 316 HV in the weld zone. The phenomenon of softening appeared between the critical heat affected zone ( ICHAZ) and the subcritical heat affected zone (SCHAZ).
中图分类号 TG113
所属栏目 材料性能及其应用
基金项目 国家自然科学基金资助项目(51274162); 陕西省自然科学基金资助项目(2012JM6003); 西安市科技计划项目(CX1250②)
收稿日期 2012/12/26
修改稿日期 2013/12/10
网络出版日期
作者单位点击查看
备注李继红(1973-), 男, 河南洛阳人, 讲师, 博士。
引用该论文: LI Ji-hong,YANG Liang,ZHANG Min. Microstructure and Property of X100 Pipeline Steel Welded Joint[J]. Materials for mechancial engineering, 2014, 38(2): 59～62
李继红,杨亮,张敏. X100管线钢焊接接头的显微组织和性能[J]. 机械工程材料, 2014, 38(2): 59～62
被引情况:
【1】陈江风,周学俊,黄峰,甘章华,王晶晶,李具中, "合金元素对SPA-H耐候钢显微组织和低温冲击韧性的影响",机械工程材料 39, 48-52(2015)
【2】涂英明,景财年,范吉超,倪晓梅,刘鹏,李怀学北京航空制造工程研究所, 北京 100084, "焊接速度对DP590双相钢板激光焊接接头组织和性能的影响",机械工程材料 40, 69-72(2016)
【3】唐家睿,陈宏远,高惠临,吉玲康, "X70管线钢管环焊接头在低约束条件下的断裂韧性",机械工程材料 40, 27-30(2016)
【4】黄 珊,吴 明,谢 飞,王 丹,张文建,刘俊杰,焦羽佳, "X80钢焊接接头在抚顺地区三种典型介质中的腐蚀行为",机械工程材料 40, 67-71(2016)
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参考文献
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【7】崔天成,郑磊,吴海凤.应变时效对不同成分高强度管线钢力学性能的影响［J］.机械工程材料,2010,34(5):30-32.
【8】American Petroleum Institute. API specification for spiral-weld line pipe ［M］.Washington D.C: American Petroleum Institute Production Department,1977.
【2】陶鹏, 张弛, 杨志刚. 高钢级管线钢的组织和力学性能［J］. 焊管,2008,31(2):19-22.
【3】黄开文. 国外高钢级管线钢的研究与使用情况［J］. 焊管,2003,26(3):1-9.
【4】HASHIMOTO Y, KOMIZO T, TSUKAMOTO M, et al. Recent development of large diameter line pipe (X80 and X100 grade)［J］.The Sumitomo Search,1988,12:179-185.
【5】LOMOZIK M. Effect of the welding thermal cycles on the structured changes in the heat affected zone and on its properties in joints welded in low alloy steels［J］.Welding International,2000,14(11):8-14.
【6】张敏,杨亮,陈飞绸,等.X100管线钢埋弧焊焊接接头的组织特征［J］.机械工程材料,2013,37(9):6-8.
【7】崔天成,郑磊,吴海凤.应变时效对不同成分高强度管线钢力学性能的影响［J］.机械工程材料,2010,34(5):30-32.
【8】American Petroleum Institute. API specification for spiral-weld line pipe ［M］.Washington D.C: American Petroleum Institute Production Department,1977.
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