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首页> 外文期刊>Journal of Manufacturing Processes >Microstructure and mechanical properties of welding metal with high Cr-Ni austenite wire through Ar-He-N_2 gas metal arc welding
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Microstructure and mechanical properties of welding metal with high Cr-Ni austenite wire through Ar-He-N_2 gas metal arc welding

机译：Ar-He-N_2气金属电弧焊用高Cr-Ni奥氏体焊丝焊接金属的组织和力学性能

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摘要

A high Cr-Ni austenite wire with 0.1% nitrogen was developed for gas metal arc welding of high strength low alloy (HSLA) steel (10Ni5CrMoV) to prevent hydrogen induced crack. The austenite weld joint without visible defects can be obtained using Ar + He + N-2 shielding gas. When N-2 content of shielding gas increased from 0% to 8%, the nitrogen content of weld metal rose from 0.10% to 0.19%, and other alloy content kept unchanged. The increasing of nitrogen content in weld metal made weld grains refined. It can improve mechanical properties of weld metal in different degrees including yield strength, tensile strength, elongation and impact toughness. However, with 8% N-2 content of shielding gas, the massive microspores appeared in weld metal will decrease the welded joint properties. Therefore, 50%Ar + 45%He + 5%N-2 was selected for welding of 10Ni5CrMoV HSLA steel using high Cr-Ni austenite wire.
机译：开发了一种含0.1％氮的高Cr-Ni奥氏体焊丝，用于高强度低合金（HSLA）钢（10Ni5CrMoV）的气体金属电弧焊，以防止氢引起的裂纹。可以使用Ar + He + N-2保护气体获得没有可见缺陷的奥氏体焊接接头。当保护气体的N-2含量从0％增加到8％时，焊接金属的氮含量从0.10％增加到0.19％，其他合金含量保持不变。焊缝金属中氮含量的增加使焊缝晶粒细化。它可以在不同程度上改善焊接金属的机械性能，包括屈服强度，拉伸强度，伸长率和冲击韧性。但是，当保护气体中的N-2含量为8％时，焊缝金属中出现的大量微孔会降低焊接接头的性能。因此，使用高Cr-Ni奥氏体焊丝选择10％Ar + 45％He + 5％N-2焊接10Ni5CrMoV HSLA钢。

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