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首页> 美国卫生研究院文献>Materials >Microstructure and Properties of SUS304 Stainless Steel Joints Brazed with Electrodeposited Ni-Cr-P Alloy Coatings
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Microstructure and Properties of SUS304 Stainless Steel Joints Brazed with Electrodeposited Ni-Cr-P Alloy Coatings

机译：用电沉积的Ni-Cr-P合金涂层钎焊SUS304不锈钢接头的组织和性能

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摘要

In this study, an amorphous Ni-13.4Cr-11.6P (mass%) alloy coating with a thickness of 30 μm was deposited on the surface of SUS304 stainless steel as a brazing filler metal to conduct brazing. The differential thermal analysis measurements indicate that the electrodeposited Ni-13.4Cr-11.6P alloy has a melting point of approximately 892 °C, which is almost consistent with that of the commercial BNi-7 filler metal. The microstructure, shear strength, and fracture mode of the brazed joint were investigated using an electron probe X-ray microanalyzer, a scanning electron microscope, an optical microscope, and a universal testing machine. The results showed that the brazed filler metal is filled between the SUS304 stainless steel plates without any flaws in the brazed seam. The P-containing phases, i.e., the Cr-P rich phase and the (Ni,Fe)3P phase, were formed in the brazed seam. The shear strength of the brazed joint obtained in this study is 59.0 MPa. The fracture occurs in the brazed filler zone, where the brittle P-containing phases are present. Galvanic current measurement results showed that the brazed Ni-13.4Cr-11.6P alloy coating has a better corrosion resistance than that of the brazed Ni-11P alloy coating, which can be attributed to the formation of a large amount of Ni-Fe solid solution and Cr-P rich phase in the top layer of the brazed Ni-13.4Cr-11.6P alloy coating.
机译：在该研究中，在SUS304不锈钢的表面上沉积厚度为30μm的无定形Ni-13.4Cr-11.6p（质量％）合金涂层作为钎料，以进行钎焊金属。差分热分析测量表明电沉积的Ni-13.4Cr-11.6p合金的熔点约为892℃，几乎与商业BNI-7填充金属的熔点几乎一致。使用电子探针X射线微分析仪，扫描电子显微镜，光学显微镜和通用试验机研究了钎焊接头的微观结构，剪切强度和断裂模式。结果表明，钎焊填充金属填充在SUS304不锈钢板之间，钎焊接缝中没有任何缺陷。在钎焊接缝中形成含P相，即Cr-P富相和（Ni，Fe）3P相。本研究中获得的钎焊接头的剪切强度为59.0MPa。裂缝发生在钎焊区中，其中存在脆性P型相。电流电流测量结果表明，钎焊的Ni-13.4Cr-11.6p合金涂层具有比钎焊的Ni-11p合金涂层更好的耐腐蚀性，可归因于形成大量的Ni-Fe固体溶液并在钎焊的Ni-13.4Cr-11.6p合金涂层顶层中富相位。

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