| 耐热球墨可锻铸铁的热处理及其组织与硬度的试验研究 |
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| 引用本文： | 孙东杰,古可成,那元真,郭俭.耐热球墨可锻铸铁的热处理及其组织与硬度的试验研究[J].热处理,2007,22(2):34-36. |
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| 作者姓名： | 孙东杰 古可成 那元真 郭俭 |
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| 作者单位： | 1. 沈阳航空职业技术学院,辽宁,沈阳,110034
2. 沈阳工业大学材料科学与工程学院,辽宁,沈阳,110023 |
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| 摘 要： | 耐热球墨可锻铸铁含4％～5％Si和4％～5％Cr，其铸态硬度一般为40～45HRC，难以切削加工。试验研究表明，退火时，在880℃以下温度随炉冷却，铸铁的硬度可降低至31HRC左右，其组织为铁素体、珠光体、碳化物和石墨的混合物，从改善了切削加工性能。
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| 关 键 词： | 金属基体 组织 退火 硬度 |
| 文章编号： | 1008-1690（2007）02-0034-003 |
| 收稿时间： | 2006-11-23 |
| 修稿时间： | 2006-11-23 |
Heat Treatment of Heat Resistant Spheroidal Graphite Malleable Cast Iron and Its Microstructure and Hardness |
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| SUN Dong-jie,GU Ke-cheng,NA Yuan-zhen,GUO Jian.Heat Treatment of Heat Resistant Spheroidal Graphite Malleable Cast Iron and Its Microstructure and Hardness[J].Heat Treatment,2007,22(2):34-36. |
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| Authors: | SUN Dong-jie GU Ke-cheng NA Yuan-zhen GUO Jian |
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| Affiliation: | 1. Shenyang Vocation Aviation Technical College, Shenyang 110034, Liaoning;2. School of Materials Science and Engineering,Shenyang University of Technology, Shenyang 110023 , Liaoning |
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| Abstract: | The heat resistant spheroidal graphite malleable cast iron contains 4% -5% Si and 4% -5% Cr, with its as-cast hardness being 40 -45 HRC and thus difficult to be machined. Investigation indicated that the hardness of cast iron will decrease to about 31 HRC and its microstructure will be a mixed structure of ferrite, pearlite , carbide and graphite, improving machining property. |
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| Keywords: | metal matrix microstructure annealing hardness |
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