为提高液压支柱在复杂工况下的工作寿命，以水玻璃为黏结剂在液压支柱基体27SiMn上涂覆镍基自熔合金粉末，采用手工钨极氩弧焊进行熔修。利用金相显微镜观察熔覆层表面和横截面的组织，进行熔敷金属的硬度、耐磨性实验，测试了基体与熔覆层的耐蚀性能。结果表明：熔覆金属的显微组织和力学特性随着熔覆电流的变化而改变，耐磨性在熔覆电流为70 A时为最优，熔覆层较基体的耐蚀性有显著提高。
In order to improve the service life of hydraulic prop in complex conditions,TIG was utilized to weld nickel?based alloy powder on the hydraulic prop made from 27SiMn,the powder was glued by sodium silicate. The microstructures of cladding layer and cross section were studied,and hardness and abrasion resistance were tested. Meanwhile,the difference of corrosion resistance between base metal and cladding layer was analyzed. The experiment results show that wear resistance is optimum when welding current is 70 A,corrosion resistance can be improved by TIG cladding.
参考文献
| [1] | 朱华,吴兆宏,李刚,葛世荣.煤矿机械磨损失效研究[J].煤炭学报,2006(03):380-385. |
| [2] | 时连军,马明国,侯光军,刘兴慧.支架立柱的损坏原因及预防措施[J].煤矿机械,2002(09):71-73. |
| [3] | 叶津平.液压支柱的腐蚀与防护[J].科技情报开发与经济,1998(01):0. |
| [4] | 王娟.表面堆焊与热喷涂技术[M].北京:化学工业出版社,2004:168-170. |
| [5] | 单际国,董祖珏,徐滨士.我国堆焊技术的发展及其在基础工业中的应用现状[J].中国表面工程,2002(04):19-22. |
| [6] | 徐滨士,马世宁,刘世参,张伟.21世纪的再制造工程[J].中国机械工程,2000(01):36-39. |
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