| 304不锈钢精铸件点缺陷的形成与控制 |
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| 引用本文： | 谷万里,盛文斌.304不锈钢精铸件点缺陷的形成与控制[J].热加工工艺,2007,36(1):56-58. |
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| 作者姓名： | 谷万里 盛文斌 |
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| 作者单位： | 山东理工大学,机械工程学院,山东,淄博,255049 |
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| 基金项目： | 山东理工大学校科研和教改项目 |
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| 摘 要： | 针对典型304不锈钢精密铸件内出现的黑色点缺陷,对其表面形貌、成分进行了分析,并在此基础上总结了缺陷的形成机制,确定了相应的防止措施。研究结果表明,铸件内的点缺陷可以划分为两类:一类具有不规则截面,为脱蜡过程中剩余腊料的燃烧残留物;另一类为熔炼过程中,由于脱氧剂和除渣剂的去除不彻底而引入的夹杂。通过优化脱蜡和熔炼工艺,使得铸件内的点缺陷得到了很好的控制。
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| 关 键 词： | 精密铸造 不锈钢 点缺陷 形成机制 |
| 文章编号： | 1001-3814(2007)01-0056-03 |
| 修稿时间： | 2006-06-26 |
Formation and Elimination of Point Defects in 304 Stainless Steel Castings |
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| GU Wan-li,SHENG Wen-bin.Formation and Elimination of Point Defects in 304 Stainless Steel Castings[J].Hot Working Technology,2007,36(1):56-58. |
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| Authors: | GU Wan-li SHENG Wen-bin |
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| Affiliation: | Deportment of mechanical engineering , Shandong University of Technology , Zibo 255049,China |
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| Abstract: | The microstructure and composition of the black point defects existing in 304 stainless steel castings were analyzed,and the forming mechanism of the defects was concluded. Furthermore,some approaches were proposed to eliminate them. The results indicate that the defects can be divided into two kinds. One kind of defect usually shows irregular cross-section,which is the leftover of wax in course of wax-losing. The other,characterized roundish cross-section,is formed because some impurities are introduced during melting. Finally,the defects are eliminated completely by optimizing the techniques of wax-losing and melting. |
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| Keywords: | precision casting stainless steel point defect forming mechanism |
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