Microstructure and performance of Nb-bearing Ni60A-Cr3C2 coatings manufactured by laser cladding - 文章详情页

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EI Scopus SCIE

摘要：

The　Ni60A-Cr3C2　coatings　with　different　Nb　addition　were　prepared　by　laser　cladding.　The　microstructure　was　observed　by　SEM　and　TEM.　The　chemical　composition　of　phases　was　studied　by　X-ray　diffractometer　and　Electron　Probe　Micro-analyzer　(EPMA).　Microhardness　and　wear　behaviour　were　measured　by　microhardness　tester　and　wear　tester,　respectively.　The　results　show　that　the　main　phases　in　Ni60A-Cr3C2　coating　are　gamma-Ni,　Cr7C3,　Cr23C6,　Ni3Si2,　Ni3B　and　CrB.　With　Nb　addition,　the　NbC　phase　appears　in　the　coatings.　The　size　and　volume　fraction　of　NbC　increase　with　the　increase　of　Nb　addition.　The　hardness　and　wear　resistance　increase　first　and　then　decrease　with　the　increase　of　Nb　addition.　The　micro-hardness　of　coatings　with　2　wt-%　Nb　addition　is　the　highest,　reaching　1046.6　Hv0.2.　The　relative　abrasive　resistance　of　coatings　with　3　wt-%　Nb　addition　is　the　best,　and　is　2.33　times　that　of　Nb-free　coatings.

关键词：

abrasive resistance microstructure Laser cladding Ni60A-Cr3C2 coatings Nb addition micro-hardness

作者机构：

[ 1 ] [Ping, Xue-Long]Beijing Univ Technol, Res Inst Adv Mat Proc Technol, Key Lab Adv Funct Mat, Minist Educ, 100 Pingle Garden, Beijing 100124, Peoples R China
[ 2 ] [Fu, Han-Guang]Beijing Univ Technol, Res Inst Adv Mat Proc Technol, Key Lab Adv Funct Mat, Minist Educ, 100 Pingle Garden, Beijing 100124, Peoples R China
[ 3 ] [Sun, Shu-Ting]Beijing Univ Technol, Res Inst Adv Mat Proc Technol, Key Lab Adv Funct Mat, Minist Educ, 100 Pingle Garden, Beijing 100124, Peoples R China
[ 4 ] [Lin, Jian]Beijing Univ Technol, Res Inst Adv Mat Proc Technol, Key Lab Adv Funct Mat, Minist Educ, 100 Pingle Garden, Beijing 100124, Peoples R China
[ 5 ] [Guo, Xing-Ye]Beijing Univ Technol, Res Inst Adv Mat Proc Technol, Key Lab Adv Funct Mat, Minist Educ, 100 Pingle Garden, Beijing 100124, Peoples R China
[ 6 ] [Lei, Yong-Ping]Beijing Univ Technol, Res Inst Adv Mat Proc Technol, Key Lab Adv Funct Mat, Minist Educ, 100 Pingle Garden, Beijing 100124, Peoples R China

通讯作者信息：

符寒光
[Fu, Han-Guang]Beijing Univ Technol, Res Inst Adv Mat Proc Technol, Key Lab Adv Funct Mat, Minist Educ, 100 Pingle Garden, Beijing 100124, Peoples R China

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