期刊论文

Qiu, C.

中文

金属热处理

0254-6051

2015

40

3

19-22

10.13251/j.issn.0254-6051.2015.03.005

国家自然科学基金重大研究计划(91326114) 湖南省教育厅高校科学研究项目(湘财教指[2014]85号) 湖南省高校科技创新团队支持计划(湘教通[2012]318号) 湖南省重点学科建设项目(湘教发[2011]76号)

本校为第一且通讯机构

用CrFe、FeAl、Ti和304不锈钢粉末为涂层原材料,在哈氏合金表面利用火焰喷涂和激光原位合成技术制备了Cr-Fe-Al-Ti-C复合涂层。借助光学显微镜、X 射线衍射仪、扫描电镜和显微硬度仪等分别对复合涂层表面宏观形貌、微观组织结构以及显微硬度进行了分析。结果表明,复合粉末CrFe、FeAl和Ti 质量比为2∶2∶1时,涂层表面较光整,无气孔、裂纹和过熔等缺陷。激光原位合成含有Cr_2O_3、Al_2O_3、Cr_7C_3、SiC 等硬质陶瓷相的3种复合涂层组织弥散均匀分布,无凹坑和裂纹等缺陷,复合涂层与基材形成了良好的冶金结合。3种复合涂层的显微硬度值较基材均有显著提高,最高达974.9 HV0.2,约为基材硬度的4倍。

Cr-Fe-Al-Ti-C composite coatings were prepared by flame spraying and laser in situ synthesis technology on surface of Hastelloy alloy by use of CrFe, FeAl, Ti and 304 stainless steel powder as coating raw materials. The macromorphology, microstructure and micro-hardness of composite coatings were investigated by means of optical microscopy, X-ray diffractometer, scanning election microscopy, micro-hardness tester respectively. The results show that surface of the composite coating is smooth and there is no defects of porous, cracks and over-mel...