MICROSTRUCTURES AND MECHANICAL PROPERTIES OF SPRAY FORMED H13 TOOL STEEL
Received date: 2013-12-17
Revised date: 2014-04-22
Online published: 2014-07-20
Supported by
National Basic Research Program of China (No.2011CB606303)
分别采用传统铸造与喷射成形工艺制备了H13钢并对其进行了锻造和传统热处理. 利用OM, SEM和XRD研究了铸造与喷射成形H13钢在不同工艺状态下组织的差异, 并且在相同的热处理制度下测试了两者的常温与高温力学性能. 结果表明: 与传统铸造H13钢相比, 喷射成形H13钢具有更好的回火稳定性、更高的室温与高温拉伸强度, 室温冲击韧性提高了2倍, 并且消除了带状偏析, 提高了组织的等向性. 喷射成形H13钢力学性能的提高主要归因于沉积态H13钢组织均匀细小, 消除了宏观偏析, 更没有粗大的一次碳化物, 这使得淬火后基体含有更多的合金元素, 分布也更均匀, 从而在回火时析出的二次碳化物更弥散并且晶粒也更细.
Key words： spray forming; H13 steel; microstructure; mechanical property
Jinxiang ZHANG , Jinfeng HUANG , Hebin WANG , Lin LU , Hua CUI , Jishan ZHANG . MICROSTRUCTURES AND MECHANICAL PROPERTIES OF SPRAY FORMED H13 TOOL STEEL[J]. Acta Metall Sin, 2014 , 50(7) : 787 -794 . DOI: 10.3724/SP.J.1037.2013.00820
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