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复合粉预处理对WC-10Co超细晶硬质合金刀具寿命的影响
  • ISSN号：1000-3738
  • 期刊名称：《机械工程材料》
  • 时间：0
  • 分类：TF125[冶金工程—粉末冶金;冶金工程—冶金物理化学] TG506.1[金属学及工艺—金属切削加工及机床]
  • 作者机构：[1]北京工商大学材料与机械工程学院,北京100048, [2]北京理工大学,先进加工技术国防重点学科实验室,北京100081, [3]北京工业大学材料科学与工程学院,北京100124
  • 相关基金：国家自然科学基金重点资助项目（50935001）
作者： 程剑兵[1,2], 庞思勤[2], 王西彬[2], 于启勋[2], 魏崇斌[3]
关键词： 超细晶硬质合金, 高温合金, 低压烧结, 刀具寿命, 粉末预处理, ultrafine cemented carbide, superalloy, low pressure sintering, service life of cutting tool, powder pretreatment
中文摘要：

采用未预处理和经1 300℃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。

英文摘要：

With uwpretreated and pretreated （heating at 1 300 ℃ for 1 h） WC-10Co powder, WC-IOCo 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.

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期刊信息
  • 《机械工程材料》
  • 北大核心期刊（2011版）
  • 主管单位:上海科学院
  • 主办单位:上海材料研究所
  • 主编：杨武
  • 地址：上海市邯郸路99号
  • 邮编：200437
  • 邮箱：mem@mat-test.com
  • 电话：021-65556775-368
  • 国际标准刊号：ISSN：1000-3738
  • 国内统一刊号：ISSN：31-1336/TB
  • 邮发代号:4-221
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  • 被引量:13383