Microstructure and wear resistance of plasma arc surfacing TiC/NiTi alloys - 文章详情页

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摘要：

The　titanium　carbide　(TiC)　reinforced　NiTi　alloy　composite　coatings　on　Q235　mild　steel　were　produced　by　plasma　transferred　arc　surfacing　(PTA).　The　wear-resistance　of　the　alloy　coatings　was　evaluated　on　a　MLS225　set　sand　rubber　wheel　tester　coupling　with　Q235　mild　steel.　The　results　show　that　the　wear-resistance　of　the　coatings　is　11　times　higher　than　that　of　Q235　mild　steel,　when　the　content　of　TiC　in　the　coatings　is　55%.　The　composite　coating　mainly　consists　of　TiC,　Ni3Ti　and　NiTi.　The　coating　is　metallurgically　bonded　to　the　substrate.　The　excellent　wear　resistance　of　the　coating　is　attributed　to　the　reinforcement　of　TiC,　Ni3Ti　phase　with　high　hardness　and　to　the　tough　NiTi　intermetallic　matrix.　The　abrasion　of　the　coatings　are　dominated　mainly　by　plastic　cutting　and　brittle　spalling　of　hard　phases.

关键词：

Alloys Carbon steel Cerium alloys Composite coatings Hard facing Nickel Plasma welding Reinforcement Titanium carbide Wear resistance

作者机构：

[ 1 ] [Li, Yong]College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China
[ 2 ] [He, Ding-Yong]College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China
[ 3 ] [Suo, Hong-Li]College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China
[ 4 ] [Zhou, Zheng]College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China
[ 5 ] [Jiang, Jian-Min]College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China
[ 6 ] [Wang, Zhi-Hui]College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China

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dyhe@bjut.edu.cn

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