ABSTRACT

In this study,we prepared the 15-5 PH stainless steel samples using the wire-arc additive manufacturing (WAAM) technique. The performances for as-welded samples and samples after post-weld heat treatment (1050°C×1 h) was studied systematically. The main phases are martensite and grain boundary precipitates. There are many dislocations in the crystal structure of the as-welded samples. The Cu phase and Nb phase precipitate, and the number of dislocations in the post-weld heat-treated samples decrease. The microhardness is even in the sample transverse and longitudinal sections, with mean values for the as-welded sample of349.5 HV_0.2 and 345.5 HV_0.2, respectively, and for the heat-treated sample of 349.7 HV_0.2 and 349.2 HV_0.2, respectively. The yield strength of the as-welded sample is 666 MPa, the tensile strength is 1080 MPa. The yield strength of the heat-treated sample is 611 MPa, the tensile strength is 1105 MPa.

摘要

在这项研究中，我们使用线弧增材制造 (WAAM) 技术制备了 15-5 PH 不锈钢样品。系统地研究了焊态试样和焊后热处理（1050℃×1 h）后试样的性能。主要相是马氏体和晶界析出相。焊态试样的晶体结构中有许多位错。Cu相和Nb相析出，焊后热处理试样的位错数减少。试样横断面和纵截面显微硬度均匀，焊态试样平均值分别为349.5 HV _0.2 和 345.5 HV _0.2，热处理试样平均值为 349.7 HV _0.2 和 349.2 HV _0.2， 分别。焊态试样的屈服强度为666 MPa，抗拉强度为1080 MPa。热处理试样的屈服强度为611 MPa，抗拉强度为1105 MPa。