| 12Cr2Mo1R钢焊条电弧焊焊接接头的性能 |
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| 引用本文： | 陈文静,钟玉,伍碧霞,衡杰.12Cr2Mo1R钢焊条电弧焊焊接接头的性能[J].机械工程材料,2012(3):46-49. |
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| 作者姓名： | 陈文静 钟玉 伍碧霞 衡杰 |
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| 作者单位： | 西华大学材料科学与工程学院;东方汽轮机有限公司;中航工业成都凯天电子股份有限公司;中国水电十局 |
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| 基金项目： | 特种材料及制备四川省高等学校重点实验室(西华大学)建设项目(SZJJ2009-019) |
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| 摘 要： | 采用焊条电弧焊工艺用奥氏体A302焊条对12Cr2Mo1R钢进行焊接,焊后对焊接接头进行425℃保温370h的热处理;对焊接接头进行了显微组织观察、能谱分析、物相测定和高温拉伸、冲击试验。结果表明:焊缝区组织为奥氏体、δ铁素体和少量碳化物;焊接接头高温拉伸屈服强度比母材的大,焊缝区的冲击功比母材的低;在焊缝区产生了少量脆性碳化物(M23C6型)和铁-铬新相,造成焊缝区的脆性比母材的增大。
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| 关 键 词： | 12Cr2Mo1R钢 焊接接头 高温拉伸性能 冲击功 |
Properties of Joint of 12Cr2Mo1R Steel Welded by Shielded Metal Arc Welding |
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| CHEN Wen-jing,ZHONG Yu,WU Bi-xia,HENG Jie.Properties of Joint of 12Cr2Mo1R Steel Welded by Shielded Metal Arc Welding[J].Materials For Mechanical Engineering,2012(3):46-49. |
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| Authors: | CHEN Wen-jing ZHONG Yu WU Bi-xia HENG Jie |
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| Affiliation: | 1.The School of Materials Science and Engineering,Xihua University,Chengdu 610039,China; 2.Dongfang Steam Turbine Co.,Ltd.,Deyang 618000,China;3.CAIC Electronics Co.,Ltd., Chengdu 610091,China;4.Bureau of Hydropower Ten,Chengdu 610000,China) |
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| Abstract: | Shielded metal arc welding(SMAW) process was adopted to weld the 12Cr2Mo1R steel using austenitic A302 electrode as welding material.The post-weld heat treatment of the welded joints was performed at the temperature of 425 ℃ for 370 h.The microstructure observation,spectrum analysis,phase composition test and high temperature tensile test as well as impact test for the welded joints were carried out.The results show that the microstructure of weld seam zone was composed of austenite,δ ferrite and a small amount of carbides.The high-temperature yield strength of the joint was higher than that of the base,and the impact energy of the weld seam zone was lower than that of the base.Comparing with the base,a little of brittle carbide(M23C6) and a new phase of Fe-Cr emerged in the weld seam zone,which resulted in the brittleness increased. |
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| Keywords: | 12Cr2Mo1R steel welded joint high temperature tensile property impact energy |
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