共查询到16条相似文献,搜索用时 125 毫秒
1.
2.
3.
4.
5.
高铬铸铁中碳化物相抗磨作用的“尺寸效应” 总被引:10,自引:3,他引:7
在以显微切削为主要机制的二体磨制磨损系统中,研究了不同铸型条件下碳化物尺寸的变化对高铬铸铁耐磨性的影响。结果表明,高铬铸铁中碳化物相的抗磨作用具有“尺寸效应”,即在碳化物数量一定时,过小的碳化物尺寸将影响碳化物相抗磨作用的发挥,大幅度地降低高铬铸铁的耐磨性。 相似文献
6.
7.
高铬铸铁基体组织对冲击磨损的影响 总被引:3,自引:0,他引:3
研究了具有一定碳化物体积分数而基体组织不同的高铬铸铁在不同冲击磨损条件的磨损特性,结果表明,磨料改变引起磨损失重,磨损次序和磨损失效机制的变化。 相似文献
8.
9.
10.
11.
研究高铬铸铁-碳钢固-液复合铸造锤头的组织及硬度分布特征。结果表明,固-液复合铸造高铬铸铁锤头部分具有较高的硬度,远离复合面高铬铸铁硬度增加,碳钢硬度降低。远离复合面高铬铸铁组织为M7C3型碳化物+回火马氏体+残余奥氏体,固-液复合铸造高铬铸铁组织中碳化物有定向分布的趋势,有利于提高锤头的耐磨性;远离复合面碳钢部分的组织为珠光体和较多的铁素体,复合面附近碳钢组织珠光体数量明显增加,铁素体数量明显减小,高铬铸铁中的碳通过复合界面向碳钢进行扩散。 相似文献
12.
13.
Effects of RE,V, Ti and B composite modification on the microstructure and properties of high chromium cast iron containing 3% molybdenum 总被引:1,自引:0,他引:1
The effects of RE, V, Ti and B on the microstructure and properties of high chromium cast iron containing 3% molybdenum under
as-cast and heat treatment conditions were investigated with the method of comparing experiments. The results show that with
the increase of RE content, the primary austenite of high chromium cast iron is obviously refined. The morphology of carbide
is changed from netlike and lath to small multiangular isolated blocks or massive blocks, the isolated degree of carbide is
improved obviously, and the size is significantly refined. The addition of V and B into high chromium cast iron can refine
the microstructure, reduce coarse columnar crystals and make the carbide smaller and uniform. Through composite modification
with RE, V, Ti and B, the hardness, wear resistance and impact toughness of high chromium cast iron are increased conspicuously.
After heat treatment, the hardness of high chromium iron is increased significantly, but the toughness and wear resistance
do not show great improvement. 相似文献
14.
15.