| 微合金高强钢水下焊接CGHAZ中的沉淀物 |
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| 引用本文： | 石永华,王国荣. 微合金高强钢水下焊接CGHAZ中的沉淀物[J]. 华南理工大学学报(自然科学版), 1999, 27(9): 25-31 |
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| 作者姓名： | 石永华 王国荣 |
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| 作者单位： | 华南理工大学机电工程系,广州,510641 |
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| 摘 要： | 对Ｘ６０、Ｘ６５和Ｘ７０三种微合金高强钢（石油、天然气输送管线用钢）水下及空气中焊接影响粗晶区（ＣＧＨＡＺ）中的沉淀物及其溶解、再析出、长大等行为进行了考察。结果发现，在水下焊接过程中富Ｔｉ粒子几乎不溶解而富Ｖ粒子较易溶解，水下焊接同空气中焊接相比ＣＧＨＡＺ中深沉物的溶解。再析出和长大等行为均有明显差异。
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| 关 键 词： | 沉淀物 微合金化 热影响粗晶区(CGHAZ) 水下焊接 |
CGHAZ PRECIPITATES OF UNDERWATER WELDS ON MICROALLOYED HIGH STRENGTH STEELS |
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| Shi Yonghua,Wang Guorong. CGHAZ PRECIPITATES OF UNDERWATER WELDS ON MICROALLOYED HIGH STRENGTH STEELS[J]. Journal of South China University of Technology(Natural Science Edition), 1999, 27(9): 25-31 |
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| Authors: | Shi Yonghua Wang Guorong |
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| Abstract: | Precipitates and their dissolution, precipitation and coarsening in CGHAZs of underwater and in_air welds on microalloyed high_strength X60, X65 and X70 steels are investigated. Ti_rich cuboidal particles dissolve little during underwater weld thermal cycles, while V_rich spheroidal particles are apt to dissolve. There are remarkable differences between CGHAZ precipitate behaviors of underwater welding and those of in_air welding. |
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| Keywords: | precipitate microalloyed coarse_grained heat_affected zone(CGHAZ) underwater welding |
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