钛对非调质塑料模具钢奥氏体晶粒长大规律的影响<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.08.017

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Abstract The demand of automotive and appliance industry for high-quality large section plastic mold steel is gradually increased. However, with the increase of the thickness of plastic mold steel, the possibility of the occurrence of coarse grain is also increased, which calls for a reasonable design of heat treatment process. The austenite grain growth behavior during high temperature treatment was hindered by adding titanium, and the effects of Ti addition on austenite grain growth behavior of non-quenched and tempered (NQT) plastic mold steel were emphatically studied. The results show that the NQT plastic mold steel containing 0.03% Ti has better resistance to grain coarsening when the homogenization temperature is higher than 1 050 ℃, due to the Ti(C, N) precipitation disperse around the grain boundaries. Based on the experimental results, the mathematical models of grain growth were established, which can be used to predict the austenite grain growth of NQT plastic mold steel during high temperature homogenization.

Key words： micro-alloying non-quenched and tempered steel austenization precipitation

Published: 02 May 2018

CLC number:

TG142.1

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	Articles by authors
	ZHENG Yafeng
	LI Xiaocheng
	WU Riming
	WU Xiaochun

Cite this article:

ZHENG Yafeng,LI Xiaocheng,WU Riming, et al. Influence of Ti on Grain Growth Behavior of Non-quenched and Tempered Plastic Mold Steel[J]. Materials Reports, 2017, 31(8): 82-87.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.08.017 OR http://www.mater-rep.com/EN/Y2017/V31/I8/82

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