堆焊电流对高钒铁基堆焊涂层组织及耐磨性的影响
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摘要
采用等离子堆焊制备高钒铁基涂层,借助扫描电镜(SEM)、多功能体视显微镜、能谱(EDS)、X-射线衍射(XRD)、硬度计、磨损试验机等分析测试手段,研究等离子堆焊电流对高钒铁基复合堆焊涂层相组成、显微结构、硬度、耐磨性的影响。结果表明:堆焊电流对涂层的显微结构及综合力学性能有较大影响;堆焊涂层主要晶相为马氏体、VC、M_7C_3型共晶碳化物,弥散分布在马氏体基体中圆粒状的VC和(Fe,Cr,V)_7C_3共晶碳化物形成涂层的耐磨骨架;在160 A堆焊电流下制备的合金堆焊涂层具有较佳的综合力学性能,表面硬度(HRC)为63.3,磨损量为0.042 7 g。
High vanadium Fe-based surfacing coating was prepared by plasma arc surfacing technology. The effects of plasma arc surfacing current on phase composition, microstructure, hardness and wear resistance of high vanadium composite Fe-based surfacing coating were studied by scanning electron microscope(SEM), multifunctional stereomicroscope, energy spectrum(EDS), X-ray diffraction(XRD), hardness tester and wear tester, respectively. The results show that the surfacing current has a great influence on the microstructure and comprehensive mechanical properties of the coating and the main crystalline phases of the surfacing coating are martensite, VC and M_7C_3-type eutectic carbide. Small spherical VC particles with dispersive distribution in martensite matrix and(Fe, Cr, V)_7C_3 eutectic carbide form a wear-resistant skeleton. The alloy surfacing coating prepared at 160 A of surfacing current has better comprehensive mechanical properties, with 63.3(HRC) of surface hardness and 0.042 7 g of wear capacity for the surfacing coating.
High vanadium Fe-based surfacing coating was prepared by plasma arc surfacing technology. The effects of plasma arc surfacing current on phase composition, microstructure, hardness and wear resistance of high vanadium composite Fe-based surfacing coating were studied by scanning electron microscope(SEM), multifunctional stereomicroscope, energy spectrum(EDS), X-ray diffraction(XRD), hardness tester and wear tester, respectively. The results show that the surfacing current has a great influence on the microstructure and comprehensive mechanical properties of the coating and the main crystalline phases of the surfacing coating are martensite, VC and M_7C_3-type eutectic carbide. Small spherical VC particles with dispersive distribution in martensite matrix and(Fe, Cr, V)_7C_3 eutectic carbide form a wear-resistant skeleton. The alloy surfacing coating prepared at 160 A of surfacing current has better comprehensive mechanical properties, with 63.3(HRC) of surface hardness and 0.042 7 g of wear capacity for the surfacing coating.
引文
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[13] Deng Dewei, Liu Haiying, Zhang Lin, et al. Effect of current on microstructure and properties of Fe90 alloy overlay coating deposited by plasma transferred arc welding[J].Transactions of Materials and Heat Treatment,2017,38(7):138-144.(邓德伟, 刘海英, 张林,等. 电流对等离子堆焊Fe90组织与性能的影响[J]. 材料热处理学报, 2017, 38(7):138-144.)
[14] Ge Yanliu, Deng Dewei, Tian Xin, et al. Influence of parameters on microstructure and microhardness of Ni60 alloy[J].China Surface Engineering,2011,24(5):26-31.(葛言柳, 邓德伟, 田鑫,等. 焊接参数对Ni60合金等离子堆焊层组织结构和显微硬度的影响[J]. 中国表面工程, 2011, 24(5):26-31.)
[2] The State Council Information Office of the People’s Republic of China.Energy, policies[M]// Energy situation and policies of China.Beijing:Foreign Languages Press,2007.(中华人民共和国国务院新闻办公室.能源,政策[M]// 中国的能源状况与政策. 北京:外文出版社, 2007.)
[3] Deng Dewei, Chen Rui, Zhang Hongchao. Present status and development tendency of plasma transferred arc welding[J]. Journal of Mechanical Engineering,2013,49(7):106-112. (邓德伟, 陈蕊, 张洪潮. 等离子堆焊技术的现状及发展趋势[J]. 机械工程学报, 2013, 49(7):106-112.)
[4] Deuis R L, Yellup J M, Subramanian C. Metal-matrix composite coatings by PTA surfacing[J]. Composites Science & Technology, 1998, 58(2):299-309.
[5] Liu X B, Gu Y J. Plasma jet clad γ/Cr7C3, composite coating on steel[J]. Materials Letters, 2006, 60(5):577-580.
[6] Liu Y F, Xia Z Y, Han J M, et al. Microstructure and wear behavior of (Cr,Fe)7C3, reinforced composite coating produced by plasma transferred arc weld-surfacing process[J]. Surface & Coatings Technology, 2006, 201(3-4):863-867.
[7] Zhao Kun, Wang Hongying, Cheng Zhiguo, et al. Obtaining composite surfacing coating of Fe-based alloy + WC hard alloy by plasma arc surfacing[J]. Transaction of The China Welding Institution,2002,23(3):56-58.(赵昆, 王红英, 程志国,等. 利用等离子弧堆焊获得铁基合金+碳化钨硬质合金的复合堆焊涂层[J]. 焊接学报, 2002, 23(3):56-58.)
[8] Mou Lijun. Study on iron based high temperature wear resistance surfacing electrode and welding process[D]. Shenyang :Shenyang University of Technology,2003.(牟力军. 铁基高温耐磨堆焊焊条及焊接工艺研究[D]. 沈阳:沈阳工业大学, 2003.)
[9] Sapate S G, Rama Rao A V. Effect of carbide volume fraction on erosive wear behaviour of hardfacing cast irons[J]. Wear, 2004, 256(3): 774-786.
[10] Zou Lihua, Fan Jianzhong. Research process in fatigue of particle-reinforced metal matrix composites[J]. Materials Review,2010,24(1):19-24.(邹利华, 樊建中. 颗粒增强金属基复合材料疲劳研究进展[J]. 材料导报, 2010, 24(1):19-24.)
[11] Zong Lin, Liu Zhengjun, Gao Hailiang, et al. Wear resistance analysis of high vanadium composite surfacing alloy[J]. Transaction of The China Welding Institution,2011,32(9):41-44.(宗琳, 刘政军, 高海亮,等. 高钒复合堆焊合金的耐磨性分析[J]. 焊接学报, 2011, 32(9):41-44.)
[12] Zong Lin, Liu Zhengjun, Li Yuecheng. Wear resistance of in-situ Fe-Cr-V-C hardfacing alloy fabricated by plasma transferred arc weld-surfacing process[J].Journal of Materials Engineering,2012(5):20-23.(宗琳, 刘政军, 李乐成. 等离子原位合成Fe-Cr-V-C堆焊合金的耐磨性[J]. 材料工程, 2012(5):20-23.)
[13] Deng Dewei, Liu Haiying, Zhang Lin, et al. Effect of current on microstructure and properties of Fe90 alloy overlay coating deposited by plasma transferred arc welding[J].Transactions of Materials and Heat Treatment,2017,38(7):138-144.(邓德伟, 刘海英, 张林,等. 电流对等离子堆焊Fe90组织与性能的影响[J]. 材料热处理学报, 2017, 38(7):138-144.)
[14] Ge Yanliu, Deng Dewei, Tian Xin, et al. Influence of parameters on microstructure and microhardness of Ni60 alloy[J].China Surface Engineering,2011,24(5):26-31.(葛言柳, 邓德伟, 田鑫,等. 焊接参数对Ni60合金等离子堆焊层组织结构和显微硬度的影响[J]. 中国表面工程, 2011, 24(5):26-31.)