热等静压工艺参数对钨合金粉末及烧结棒材性能和断裂行为的影响

Effect of Hot Isostatic Pressing Process Parameters on Properties and Fracture Behavior of Tungsten Alloy Powders and Sintered Bars.

作者信息

Hu Biao, Cai Gaoshen

机构信息

School of Mechanical Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China.

出版信息

Materials (Basel). 2022 Dec 4;15(23):8647. doi: 10.3390/ma15238647.

DOI:10.3390/ma15238647

PMID:36500142

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9739649/

Abstract

In order to investigate the effect of hot isostatic pressing (HIP) process parameters on the properties and fracture behavior of tungsten alloy, HIP experiments with different process parameters were carried out, and the relative density, Rockwell hardness, tensile properties, and tensile fracture behavior were analyzed. The results show that after HIP, the tungsten alloy samples obtained further densification, higher relative density and hardness, and lower dispersity. At 1300 °C and 140 MPa, the sintered bar achieved excellent mechanical properties: yield strength increased by 16.5%, tensile strength increased by 16.1%, and fracture strength increased by 85.3%. Comparing the two processes, the mechanical properties of tungsten alloy powders formed directly via HIP were not as good as those of the sintered bars. In addition, after HIP, the fracture mode of the tungsten alloy sintered bar samples was mainly ductile tear, and that of the tungsten alloy powder samples was mainly a full brittle fracture.

摘要

为了研究热等静压（HIP）工艺参数对钨合金性能及断裂行为的影响，开展了不同工艺参数的HIP实验，并分析了其相对密度、洛氏硬度、拉伸性能及拉伸断裂行为。结果表明，经过HIP处理后，钨合金样品进一步致密化，相对密度和硬度更高，分散性更低。在1300℃和140MPa条件下，烧结棒材获得了优异的力学性能：屈服强度提高了16.5%，抗拉强度提高了16.1%，断裂强度提高了85.3%。对比两种工艺，直接通过HIP形成的钨合金粉末的力学性能不如烧结棒材。此外，经过HIP处理后，钨合金烧结棒样品的断裂模式主要为韧性撕裂，而钨合金粉末样品的断裂模式主要为完全脆性断裂。