WC-W_2C-VC颗粒增强镍基熔覆层的热力学研究
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摘要
采用激光熔覆技术预置粉末法,制备WC-W2C-VC颗粒增强的镍基熔覆层,使用电子扫描电镜(SEM)和电子能谱(EDS)对熔覆层显微组织进行了分析,应用热力学原理对WC-W2C-VC颗粒的热力学过程进行了分析。结果表明,当温度在880~2 400K之间时,可以生成W2C、WC、VC等强化相颗粒,W2C、WC、VC等强化相颗粒均匀、细密分布在熔覆层中,可提高熔覆层硬度和耐磨性。
Preset powder using the method of laser cladding technology,prepared Ni-based cladding layer reinforced by WC-W2C-VC particle,the microstructures of cladding layer were analyzed using scanning electron microscopy(SEM)and electron spectroscopy(EDS)and the thermodynamic processes of WC-W2C-VC particles were analyzed according to thermodynamic principles.The results show that the WC、W2C and VC and other reinforcing phase particles can be generated when the temperature is between about 880 ~ 2 400 Kand the particles is distributed uniformly and compactly in cladding layer,the hardness and wear resistance of the cladding layer is improved greatly.
Preset powder using the method of laser cladding technology,prepared Ni-based cladding layer reinforced by WC-W2C-VC particle,the microstructures of cladding layer were analyzed using scanning electron microscopy(SEM)and electron spectroscopy(EDS)and the thermodynamic processes of WC-W2C-VC particles were analyzed according to thermodynamic principles.The results show that the WC、W2C and VC and other reinforcing phase particles can be generated when the temperature is between about 880 ~ 2 400 Kand the particles is distributed uniformly and compactly in cladding layer,the hardness and wear resistance of the cladding layer is improved greatly.
引文
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[3]安代明.激光熔覆工艺参数对熔覆层质量的影响[J].材料保护,2012,45(12):36-38.
[4]高立,周芳.Al-TiO2-C激光熔覆制备TiC/Fe复合涂层及其组织和性能[J].表面技术,2011,40(6):7-9.
[5]李荐,李淳伟,夏亨,等.添加ZrO2对Si3N4复合陶瓷材料力学性能的影响[J].稀有金属与硬质合金,2013,40(1):39-41.
[6]ZHANG Kemin,ZOU Jianxin,LI Jun,et al.Surface modification of TC4 Ti alloy by laser cladding with TiC+Ti powders[J].Transactions of Nonferrous Metals Society of China,2010(20):2192-2197.
[7]董凯林,时凯华,江庆,等.碳含量对WC-6%Ni细晶硬质合金组织结构及性能的影响[J].硬质合金,2013,30(4):190-196.
[8]张栋栋,石岩,刘佳,等.激光熔覆高硬涂层裂纹控制研究[J].应用激光,2014,34(1):1-8.
[9]钱华丽,晁明举,田得雨,等.激光制备原位自生NbCVC颗粒增强镍基熔覆层[J]..激光杂志,2011,32(4):33-35.
[10]LUO Fang,YAO Jianhua,HU Xiaxia,et al.Effect of laser power on the cladding temperature field and the heat affected zone[J].Journal of Iron and Steel Research,International,2011,18(1):73-78.
[11]高正源,潘复生,汤爱涛,等.AZ31镁合金表面纳米Al2O3涂层的耐蚀耐磨性能研究[J].功能材料,2013,44(8):1069-1072.
[12]梁英教,车荫昌.无机物热力学数据手册[M].沈阳:东北大学出版社,1993.
[13]叶大伦,胡建华.实用无机物热力学数据手册[M].北京:冶金工业出版社,2002:888.
[14]WANG Jiansheng,MENG Huimin,YU Hongying,et al.Surface hardening of Fe-based alloy powders by Nd∶YAG laser cladding followed by electrospark deposition with WC-Co cemented carbide[J].Rare Metals,2010,2(4):380-384.
[15]乐志强,薄胜民,王光建.无机精细化学品手册[M].北京:化学工业出版社,2001:763.