| 合金元素对室温油分级等温淬火贝氏体球铁组织和性能的影响 |
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| 引用本文： | 魏德强. 合金元素对室温油分级等温淬火贝氏体球铁组织和性能的影响[J]. 机械工程材料, 2005, 29(12): 29-32,55 |
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| 作者姓名： | 魏德强 |
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| 作者单位： | 桂林电子工业学院机电与交通工程系,广西,桂林,541004 |
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| 摘 要： | 采用一种新的室温油分级等温淬火工艺获得低合金贝氏体球墨铸铁；研究了硼、铜、锰对贝氏体球墨铸铁组织和性能的影响，并讨论了球墨铸铁的性能滞后现象，即等温淬火后随时问延长硬度增加的现象。结果表明：硼和锰能提高硬度，降低韧性；铜提高韧性。合理加入合金元素有利于提高贝氏体球铁的性能。贝氏体球墨铸铁有性能滞后现象，其实质是溶质类拖曳作用。
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| 关 键 词： | 分级等温淬火 贝氏体 球墨铸铁 |
| 文章编号： | 1000-3738（2005）12-0029-04 |
| 收稿时间： | 2004-09-15 |
| 修稿时间： | 2004-09-152004-11-30 |
Effect of Alloying Elements on Structure and Mechanical Properties of Bainite Ductile Iron in the Step Austempering in Machine Oil at Room Temperature |
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| WEI De-qiang. Effect of Alloying Elements on Structure and Mechanical Properties of Bainite Ductile Iron in the Step Austempering in Machine Oil at Room Temperature[J]. Materials For Mechanical Engineering, 2005, 29(12): 29-32,55 |
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| Authors: | WEI De-qiang |
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| Affiliation: | Guilin University of Electronic Technology, Guilin 541004, China |
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| Abstract: | A low alloy Bainite ductile cast iron had been obtained by using a new heat treatment technique of the step austempering in room temperature machine oil.The effects of elements B,Cu and Mn on structure and mechanical properties of the Bainite ductile cast iron in above-mentioned process were investigated.The phenomenon of hardness lag of the alloyed Bainite ductile cast iron has been discussed.This phenomenon showed that after the step austempering,the hardness increased with the time.Both elements B and Mn could increase the hardness and reduce the impact strength;element Cu could increase the impact strength.Reasonable alloy elements could improve mechanical properties of the Bainite ductile cast iron.Essentially,hardness lag of the alloyed Bainite ductile cast iron resulted from solute drag-like effect. |
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| Keywords: | step austempering Bainite ductile cast iron |
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