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投稿时间：2012-12-09 修订日期：2013-02-26
投稿时间：2012-12-09 修订日期：2013-02-26
中文摘要: 采用Gleeble-1500D 热模拟机对316L不锈钢粉末进行烧结，制备出尺寸为Φ1.0mm×1.0mm的微型零件。研究了升温速率和烧结温度对微型零件微观组织及性能的影响。结果表明：随着升温速率的增大，粉末颗粒间孔隙数量减少、试样相对密度增加；随着烧结温度的提高，烧结试样基体孔隙数量减少，试样相对密度显著升高；在升温速率为50℃/s，烧结温度为900℃时，可以得到将近全致密的试样，而且烧结温度低于传统烧结方所用烧结温度；试样最大轴向尺寸变化出现在烧结阶段中，说明在多物理场耦合粉末微成形工艺中升温速率比烧结温度更重要。
中文关键词: 多物理场耦合粉末微成形技术 升温速率 烧结温度 致密化 316L不锈钢粉末
Abstract:Micro components of Φ1.0mm×1.0mm of 316L stainless steel were fabricated by using Gleeble-1500D. The effects of heating rate and sintering temperature on the microstructure and mechanical properties were studied. The result show that the pores reduced and relative density of the sintered body increased obviously with the increase of heating rates and sintering temperature. The sintered samples can be close to full density when the heating rate was 50℃/s and sintering temperature was 900℃. And the sintering temperature was lower than the sintering temperature of traditional method. Analysis of axial reduction of cylindrical compacts showed that the peak value appeared during the sintering period, which suggested that heating rate is more important than the sintering temperature on the densification.
文章编号：201201015 中图分类号： 文献标志码：
基金项目:国家自然科学基金
| 作者 | 单位 | |
| 杨先芝 | 四川大学制造科学与工程学院 | yxzscuzz@163.com |
| 杨屹* | 四川大学制造科学与工程学院 | yangyi@scu.edu.cn |
| 杨刚 | 四川大学制造科学与工程学院 | |
| 黄坤兰 | 四川大学制造科学与工程学院 |
作者简介:
引用文本：
杨先芝,杨屹,杨刚,黄坤兰.Micro-Fast中升温速率和烧结温度对零件致密化的影响[J].工程科学与技术,2013,45(Z1):158-162.
Yang Xian-Zhi,Yang Yi,Yang Gang,Huang Kun-lan.Effects of Heating Rate and Sintering Temperature on Densification of Compacts under Micro-Fast[J].Advanced Engineering Sciences,2013,45(Z1):158-162.
引用文本：
杨先芝,杨屹,杨刚,黄坤兰.Micro-Fast中升温速率和烧结温度对零件致密化的影响[J].工程科学与技术,2013,45(Z1):158-162.
Yang Xian-Zhi,Yang Yi,Yang Gang,Huang Kun-lan.Effects of Heating Rate and Sintering Temperature on Densification of Compacts under Micro-Fast[J].Advanced Engineering Sciences,2013,45(Z1):158-162.