放电等离子烧结K403镍基高温合金渗铝层的制备及性能

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摘要根据电场对原子扩散的促进作用,结合放电等离子烧结快速升降温的优点,实现镍基高温合金的快速渗铝,并研究渗铝温度对K403镍基高温合金渗铝组织结构的影响,以及渗铝后材料的高温抗氧化性能和摩擦磨损性能。结果表明,900 ℃渗铝30 min,获得了厚度约为109 μm的渗铝层,属于低温高活度渗铝;1 000 ℃的渗铝层厚度约为89 μm,属于高温低活度渗铝。经1 000 ℃氧化后,质量增加速率从未经处理镍基高温合金的2.5 mg/cm²下降到渗铝镍基高温合金的1.3 mg/cm²,降低48%。同时摩擦因数从1.2减小至0.6,降低50%。体积磨损率从4.08%下降至0.392%,降低90.4%。

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	蒋俊
	李瑞迪
	袁铁锤
	王越
	王敏卜

关键词 ：镍基高温合金, 包埋渗铝, 放电等离子烧结, 摩擦磨损, 高温抗氧化性

Abstract：According to the effect of electric field on atomic diffusion, combined with the advantages of pulse plasma sintering which rapid temperature rise and high cooling rate can be achieved to realize rapidly aluminizing of nickel base alloy. In this paper, the effect of aluminizing temperature on aluminized process of K403 nickel-based superalloy and the high temperature oxidation resistance and wear properties of the Ni-based superalloy were studied. The results show that the aluminized coating with a thickness of about 109 μm is obtained through aluminized at 900 ℃ for 30 min, which belongs to low temperature and high activity aluminizing. The thickness of aluminized layer at 1 000 ℃ is about 89 μm, which belongs to aluminizing at high temperature and low activity. After 1 000 ℃ oxidation, the mass gain from 2.5 mg/cm²of untreated nickel-based superalloy decreases to 1.3 mg/cm² of the aluminized nickel-base superalloy, reduced by 48%. Meanwhile, the friction coefficient decreases by 50% from 1.2 to 0.6. The volume wear rate decreases from 4.08% to 0.392%, reduced by 90.4%.

Key words： nickel base superalloy pack cementation spark plasma sintering friction wear high temperature oxidation resistance

收稿日期: 2018-10-28 出版日期: 2019-07-12

ZTFLH:

TF124.212

基金资助:国家自然科学基金资助项目(51474245)

作者简介: 李瑞迪,副教授,博士。电话：0731-88830142;E-mail: liruidi@csu.edu.cn

引用本文:

蒋俊, 李瑞迪, 袁铁锤, 王越, 王敏卜. 放电等离子烧结K403镍基高温合金渗铝层的制备及性能[J]. 粉末冶金材料科学与工程, 2019, 24(2): 154-160.
JIANG Jun, LI Ruidi, YUAN Tiechui, WANG Yue, WANG Minbo. Fabrication and performance of aluminized coating on K403 Ni-based superalloy sintered by spark plasma sintering. Materials Science and Engineering of Powder Metallurgy, 2019, 24(2): 154-160.

链接本文:

http://pmbjb.csu.edu.cn/CN/ 或 http://pmbjb.csu.edu.cn/CN/Y2019/V24/I2/154

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