Diffusion welding of powder metallurgy high speed steel by spark plasma sintering
Diffusion welding of powder metallurgy high speed steel by spark plasma sintering
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火花等离子烧结粉末冶金高速钢扩散焊
DOI：
10.1016/j.jmatprotec.2019.116383
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发表时间：
2020-01-01
影响因子：
6.3
通讯作者：
Zhang, Qiankun
中科院分区：
文献类型：
--
作者：
Shen, Weijun;Yu, Linping;Zhang, Qiankun
本文首次采用放电等离子烧结（SPS）技术成功地实现了HS 6-7-6-10-0.1LaB（6）粉末冶金高速钢（PMHSS）的扩散焊接。研究了焊接温度、焊接压力和焊接时间等工艺参数对试样组织演变和抗拉强度的影响。结果表明，温度对焊接质量起着至关重要的作用。在1100摄氏度的温度下，在不同的压力和时间范围内，可以获得完整的焊接。在1100 ℃、30 MPa、30 min条件下焊接时，热处理后试样的抗拉强度达到2183.5 MPa，高于母材的抗拉强度，TEM分析进一步证实了SPS中的亚晶强化效应。
A diffusion welding of HS 6-7-6-10-0.1LaB(6) powder metallurgy high speed steel (PMHSS) is successfully achieved by spark plasma sintering (SPS) for the first time in this research. The effect of welding process in terms of bonding temperature, pressure and time on microstructure evolution and tensile strength of the samples are studied in detail. Results indicate that the temperature plays a vital role on the welding quality. A complete welding can be obtained at 1100 degrees C within varied ranges of pressure and time. When welded at 1100 degrees C, 30 MPa for 30 min, the tensile strength of the sample after heat treatment reaches 2183.5 MPa, higher than that of the base material, which is further confirmed by the subgrain strengthening effect in SPS from TEM analysis.