Effect of Composite Powder Pretreatment on Service Life of WC-10Co Ultrafine Cemented Carbide Cutting Tool
摘 要
采用未预处理和经1300℃保温1h预处理的WC-10Co复合粉,通过低压烧结制备了WC-10Co超细晶硬质合金并制成刀具,并用该刀具对GH2132高温合金进行连续切削试验,研究了预处理对该刀具显微组织和使用寿命的影响,分析了其磨损机制。结果表明:预处理复合粉制得刀具的平均晶粒尺寸略大于未经预处理的,但使用寿命高于未经预处理的;随着切削速度的提高,两种刀具的使用寿命均下降,但复合粉预处理刀具的寿命下降幅度较小;黏接撕裂和剥落是两种刀具的主要磨损机制,预处理复合粉刀具中WC晶粒的大小和黏结相钴的分布较均匀,其抗磨损能力高于未经预处理的。
Abstract
With un-pretreated and pretreated (heating at 1300℃ for 1h) WC-10Co powder, WC-10Co ultrafine cemented carbides were prepared by means of direct low pressure sintering and then were manufactured into cutting tools. Then the continuous cutting experiments were conducted on GH2132 superalloy by the cutting tools. The effects of the pretreatment on the microstructure and service life of the cutting tool were studied and the wear mechanism was analyzed. The results show that the average grain size of the cutting tool manufactured with pretreated composite powder was slightly larger while the service life was longer than that with un-pretreated powder. With the increase of cutting speed, the service life of the two cutting tools both decreased, but the life decreasing range of the cutting tool made from pretreated composite powder was relatively small. The adhesive wear and spalling wear were two main wear mechanisms for the two cutting tools. The distributions of WC grain size and of the adhesive phase Co in the cutting tool made from pretreated powder was uniform, resulting in the higher wear resistance than that with un-pretreated powder.
中图分类号 TF125 TG506.1 DOI 10.11973/jxgccl201704014
所属栏目 材料性能及应用
基金项目 国家自然科学基金重点资助项目(50935001)
收稿日期 2015/12/3
修改稿日期 2017/1/16
网络出版日期
作者单位点击查看
备注程剑兵(1967-),男,湖北黄冈人,讲师,博士.
引用该论文: CHENG Jian-bing,PANG Si-qin,WANG Xi-bin,YU Qi-xun,WEI Chong-bin. Effect of Composite Powder Pretreatment on Service Life of WC-10Co Ultrafine Cemented Carbide Cutting Tool[J]. Materials for mechancial engineering, 2017, 41(4): 64~68
程剑兵,庞思勤,王西彬,于启勋,魏崇斌. 复合粉预处理对WC-10Co超细晶硬质合金刀具寿命的影响[J]. 机械工程材料, 2017, 41(4): 64~68
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参考文献
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【2】魏崇斌, 宋晓艳, 付军, 等. 烧结方法对WC-Co硬质合金性能的影响[J]. 粉末冶金材料科学与工程, 2012, 17(3): 315-320.
【3】刘战强, 万熠, 周军. 高速切削刀具材料及其应用[J]. 机械工程材料, 2006, 30(5): 1-4.
【4】张立, 吴厚平. 国内外硬质合金产业状况[J]. 硬质合金, 2009, 26(2): 122-126.
【5】李壮, 王家君,林晨光, 等. WC-Co超细硬质合金微观结构对其性能的影响[J]. 硬质合金, 2009, 26(3): 188-193.
【6】谢宏, 肖逸锋, 贺跃辉, 等. 低压烧结对硬质合金组织和性能的影响[J]. 中国钨业, 2006, 21(6): 27-31.
【7】赵世贤, 宋晓艳, 王明胜, 等. 预处理工艺对放电等离子烧结超细晶WC-Co硬质合金组织和性能的影响[J]. 稀有金属材料与工程, 2010, 39 (5): 896-901.
【8】李波锋, 王新永, 于启勋, 等. 新型涂层刀具切削高温合金GH2132 的试验研究[J]. 新技术新工艺, 2010(6): 49-52.
【9】刘超, 艾兴, 刘战强, 等. 车削高温合金GH2132 时切削力和表面粗糙度的建模与试验分析[J]. 工具技术, 2009, 43(10):19-21.
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