高铬镍奥氏体焊丝焊接10Ni5CrMoV钢接头组织性能分析
Analysis on microstructure and properties of under-matching weld joint of high strength steel 10Ni5CrMoV
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摘要: 为解决10Ni5CrMoV高强钢厚板在大拘束度条件下焊接时无法避免的冷裂纹问题，自行研制了强度低于母材的高铬镍奥氏体不锈钢焊丝，采用低强匹配工艺对10Ni5CrMoV低合金高强钢厚板进行焊接并分析了接头组织性能.结果表明，采用该焊丝焊缝成形良好,无裂纹缺陷.焊缝主要由树枝状奥氏体组织组成，枝晶间有少量颗粒状析出相.其接头抗拉强度800 Mpa，弯曲试验无断裂，冲击韧性AKV（-80℃）大于90 J，满足技术要求.
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关键词:
- 10Ni5CrMoV钢 /
- 奥氏体焊丝 /
- 低强匹配 /
- 组织性能
Abstract: In order to solve the inevitable cold crack problem in 10Ni5CrMoV high strength steel thick plate welding under the condition of large constraint degree, the high-chromium-nickel austenitic stainless steel welding wire with low-match strength was developed in this paper. The microstructure and properties of the welded joint were analyzed. The results showed that the formation of the welded joint was good without crack defects. The welding metal was mainly composed of dendritic austenite and a small amount of granular precipitates. The tensile strength of the joint was 800 MPa and the sample after bending test was not fractured. The impact toughness AKV (-80 ℃) was greater than 90 J, which meets the technical requirements. -
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