摘要
以镍基合金(NiCrCoMo)为粘结相,以碳化钛(TiC)为硬质相,通过粉末冶金技术制备出抗高温氧化的TiC‒NiCrCoMo钢结硬质合金。通过优化烧结工艺得到综合性能最佳的TiC‒NiCrCoMo钢结硬质合金,测定了钢结硬质合金在不同温度下的氧化动力学曲线,并分析了氧化层的显微形貌。结果表明,经1280℃烧结的TiC‒NiCrCoMo钢结硬质合金综合性能最佳,密度为6.01 g/cm^(3),硬度为HRC 65,抗弯强度为1100 MPa。随着氧化温度的升高,TiC‒NiCrCoMo钢结硬质合金的氧化程度明显增加;通过与316L不锈钢钢结硬质合金的氧化动力学曲线对比发现,TiC‒NiCrCoMo钢结硬质合金具有优异的抗高温氧化性能。
The TiC‒NiCrCoMo steel bonded cemented carbides with high temperature oxidation resistance were prepared by powder metallurgy technology,using nickel-based alloys(NiCrCoMo)as the binder phase and titanium carbide as the hard phase.The TiC‒NiCrCoMo steel bonded cemented carbides with the best comprehensive performance were obtained by the optimization of the sintering process.The oxidation kinetics curves of the TiC‒NiCrCoMo steel bonded cemented carbides at different temperatures were measured,and the microstructure of the oxide layer was analyzed.The results show that,the TiC‒NiCrCoMo steel bonded cemented carbides with the best comprehensive performance are obtained by sintering at 1280℃with the density of 6.01 g/cm^(3),the hardness of HRC 65,and the flexural strength of 1100 MPa.With the increase of the oxidation temperature,the oxidation degree of the TiC‒NiCrCoMo steel bonded cemented carbides increases significantly.Compared with the oxidation kinetics curves of 316L stainless steel bonded cemented carbides,the TiC‒NiCrCoMo steel bonded cemented carbides show the excellent high temperature oxidation resistance.
作者
马会
罗骥
MA Hui;LUO Ji(Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,China)
出处
《粉末冶金技术》
CAS
CSCD
北大核心
2021年第2期147-152,共6页
Powder Metallurgy Technology
关键词
硬质合金
烧结
镍基合金
高温氧化性能
cemented carbides
sintering
nickel-based alloys
high temperature oxidation performance
