| YT5硬质合金注射成形 |
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| 引用本文： | 祝宝军,曲选辉,陶颖,肖平安,秦明礼.YT5硬质合金注射成形[J].硬质合金,2002,19(3):140-143. |
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| 作者姓名： | 祝宝军 曲选辉 陶颖 肖平安 秦明礼 |
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| 作者单位： | 中南大学粉末冶金国家重点实验室,长沙,410083 |
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| 基金项目： | 国家杰出青年科学基金 ( 5 0 0 2 5 412 )，国家重点基础研究发展规划 ( G2 0 0 0 0 6 72 0 3)资助课题 |
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| 摘 要： | 开发了一种适合于硬质合金注射成形的“改进型蜡基粘结剂”和一种称作“高压冷凝溶剂脱脂”的新的脱脂方法。实验结果表明 :使用该粘结剂 ,硬质合金注射混合料流变性能良好 ,临界固体粉末装载量达到 6 5 %。新的脱脂方法脱脂速率快 ,脱脂坯强度高。采用优化的工艺制备了 PIM YT5硬质合金试样 ,其抗弯强度、硬度和密度分别达到2 10 0 MPa、HRA 90 .4和 12 .83g/cm3 ,制品保形性良好 ,尺寸偏差小于± 0 .0 4m m。
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| 关 键 词： | 注射成形 硬质合金 流变性 力学性能 尺寸精度 |
| 修稿时间： | 2002年4月28日 |
POWDER INJECTION MOLDING OF YT5 TUNGSTEN CEMENTED CARBIDE |
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| Zhu Baojun Qu Xuanhui Tao Ying Xiao Pingan Qin Mingli.POWDER INJECTION MOLDING OF YT5 TUNGSTEN CEMENTED CARBIDE[J].Cemented Carbide,2002,19(3):140-143. |
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| Authors: | Zhu Baojun Qu Xuanhui Tao Ying Xiao Pingan Qin Mingli |
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| Abstract: | An improved wax-based multi-component binder and a new debinding method termed high-pressure-condensed-solvent extraction are developed for powder injection molding of tungsten cemented carbide. The experiment results indicate that a critical powder loading of 65vol.% and an ideal rheological properties are obtained by the feedstock based on the binder. High debinding rate and specimens with high strength are obtained by the debinding method. The transverse rupture strength, hardness and density of the as-sintered specimens made by an optimized PIM process were 2100MPa, HRA90.4 and 12.84 g·cm -3 respectively.Good shape retention and ±0.04mm dimension deviation were achieved. |
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| Keywords: | powder injection molding tungsten cemented carbide rheological property mechanical property dimension precision |
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