MICROSTRUCTURES AND MECHANICAL PROPERTIES OF SPRAY FORMED H13 TOOL STEEL

doi:10.3724/SP.J.1037.2013.00820

Acta Metall Sin

2014, Vol. 50

Issue (7): 787-794 DOI: 10.3724/SP.J.1037.2013.00820

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MICROSTRUCTURES AND MECHANICAL PROPERTIES OF SPRAY FORMED H13 TOOL STEEL

ZHANG Jinxiang¹, HUANG Jinfeng¹(

), WANG Hebin¹, LU Lin¹, CUI Hua², ZHANG Jishan¹

1 State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083
2 School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083

Cite this article:

ZHANG Jinxiang, HUANG Jinfeng, WANG Hebin, LU Lin, CUI Hua, ZHANG Jishan. MICROSTRUCTURES AND MECHANICAL PROPERTIES OF SPRAY FORMED H13 TOOL STEEL. Acta Metall Sin, 2014, 50(7): 787-794.

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Abstract

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

Received: 17 December 2013

ZTFLH:

TG142.1

Fund: National Basic Research Program of China (No.2011CB606303)

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	Jinxiang ZHANG
	Jinfeng HUANG
	Hebin WANG
	Lin LU
	Hua CUI
	Jishan ZHANG

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https://www.ams.org.cn/EN/10.3724/SP.J.1037.2013.00820 OR https://www.ams.org.cn/EN/Y2014/V50/I7/787

Fig.1

铸态与喷射沉积态H13钢微观组织的OM和SEM像

Fig.2

铸态与喷射沉积态H13钢的XRD谱

Fig.3

铸造与喷射成形H13钢退火态的纵向组织

Fig.4

铸造与喷射成形H13钢淬火态的纵向组织

Fig.5

铸造与喷射成形H13钢回火硬度曲线

Fig.6

铸造与喷射成形H13钢在不同温度回火的显微组织

Fig.7

铸造与喷射成形H13钢冲击试样回火组织的OM和SEM像

Fig.8

铸造与喷射成形H13钢600 ℃回火碳化物的XRD谱

Fig.9

铸造和喷射成形H13钢的冲击断口形貌

Fig.10

喷射成形H13钢的韧窝粒子形貌及其EDS

表1 铸造与喷射成形H13钢的室温力学性能

表2 铸造与喷射成形H13钢的高温拉伸性能

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