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	等温淬火含硼高硅铁基合金的韧化研究
	陈祥 ; 胡潇 ; 李言祥 ; CHEN Xiang ; HU Xiao ; LI Yan-xiang
	2016-03-30 ; 2016-03-30
关键词	等温淬火 硼化物 变质处理 高硅 austempering boride modification high silicon TG156.3
其他题名	Toughness Improvement of Austempered Boron Alloyed High Silicon Ferrous Alloy
中文摘要	等温淬火含硼高硅合金是一种新型的金属耐磨材料,它以高硬度的硼化物耐磨相代替传统的碳化物耐磨相,是在高硅铸钢合金成分的基础上添加一定量的硼元素并经由等温淬火的热处理而得到的。通常含硼高硅合金在铸态下由枝晶状基体与沿晶界分布的网状共晶硼化物组成,基体为层片状的珠光体和一定量的沿硼化物周围生长的层状铁素体,但网状分布的硼化物严重降低了其韧性。本研究在去除合金元素铬、钼的情况下通过添加钛元素进行变质,使得硼化物的形态由连续网状转变为粒状,合金在硬度基本不变的前提下冲击韧性从4 J/cm2提高至30 J/cm2。; Austempered boron alloyed high silicon cast alloy is a new kind of wear resistant material which chemical composition comes from that of the high silicon cast steel with right amount of boron. It takes eutectic borides as the hard phase instead of eutectic carbides. The common microstructure of this alloy is comprised of dendritic matrix and interdendritic eutectic borides which mostly distributed in a form of continuous network at grain boundaries in the as-cast condition. Lamellar pearlite and certain amount of ferrite around the borides can be found in the matrix. According to the previous work of the authors,the impact toughness of the alloy is relatively low due to the formation of continuous network borides at grain boundaries which can deteriorate the toughness. In this paper,the austempered boron alloyed high silicon cast alloy was developed with modification with Ti and removing of Cr and Mo in the alloys,the impact toughness could increase from 4 J/cm2 to 30 J/cm2 while the hardness keeps unchanged. The alloy with modification exhibits obvious grain refining in borides,improved the morphology of boride into discontinuous network and small particles.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/141642]
专题	清华大学
推荐引用方式 GB/T 7714	陈祥,胡潇,李言祥,等. 等温淬火含硼高硅铁基合金的韧化研究[J],2016, 2016.
APA	陈祥,胡潇,李言祥,CHEN Xiang,HU Xiao,&LI Yan-xiang.(2016).等温淬火含硼高硅铁基合金的韧化研究..
MLA	陈祥,et al."等温淬火含硼高硅铁基合金的韧化研究".(2016).

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