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首页> 外文期刊>Journal of Materials Processing Technology >Dissimilar metal welding of P91 steel-AISI 316L SS with Incoloy 800 and Inconel 600 interlayers by using activated TIG welding process and its effect on the microstructure and mechanical properties
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Dissimilar metal welding of P91 steel-AISI 316L SS with Incoloy 800 and Inconel 600 interlayers by using activated TIG welding process and its effect on the microstructure and mechanical properties

机译：P91钢-AISI 316LS与Incoloy 800的不同金属焊接通过使用活性TIG焊接工艺及其对微观结构和机械性能的影响

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摘要

This study investigates dissimilar metal weldments between P91 steel and AISI 316 L austenitic stainless steel fabricated by activated TIG welding (A-TIG) with and without the use of interlayers of Incoloy 800 and Inconel 600. Through thickness penetration in 8 mm thick plates was achieved in a single pass A-TIG welding using a pre-coated mixture of metallic oxides. Hot cracking was eliminated in A-TIG weld joints in contrast to conventional TIG weld joints without flux. Fully martensitic structure was observed in the weld metal developed without the use of interlayer. Microstructural modifications were achieved with the use of interlayers. The weldment with Incoloy 800 interlayer exhibited martensitic-austenitic structure whereas fully austenitic structure was observed with Inconel 600 interlayer. Interlayers improved impact toughness and ductility of the weld joints without significant loss of tensile strength. The effect of interlayers on carbon migration after aging treatment (620 degrees C/500 h) was evaluated with the help of thermodynamic simulations and it was observed that the use of interlayers reduced the severity of carbon migration.
机译：本研究研究了P91钢和AISI 316 L奥氏体不锈钢之间的不同金属焊接，通过激活的TIG焊接（A-TIG），并且不使用incoloy 800和Inconel 600的中间层的使用。通过厚度渗透，实现了8毫米厚板的厚度渗透使用预涂覆的金属氧化物混合物在单通机A-TIG焊接中。与无通量的传统TIG焊接接头相比，在A-TIG焊接接头中消除了热裂纹。在不使用中间层的情况下在不使用中间的焊接金属中观察到完全马氏体结构。使用中间层实现微观结构修改。夹持800中间层的焊接表现出马氏体 - 奥氏体结构，而用Inconel 600中间层观察到完全奥氏体结构。中间层改善了焊接接头的冲击韧性和延展性，而无需显着损失拉伸强度。在热力学模拟的帮助下评价老化处理后夹层对碳迁移的影响（620℃/ 500H），观察到中间层的使用降低了碳迁移的严重程度。

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