NbC、VC对泵用KMTBCr20铸铁组织与性能的影响

张忠诚; 张枫霞; 秦森; 王忠民; 刘宁; 刘宇

doi:10.15980/j.tzzz.2015.04.006

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NbC、VC对泵用KMTBCr20铸铁组织与性能的影响
Effect of NbC and VC Particles on Microstructure and Properties of KMTBCr20Cast Iron Used for Pump
2015年35卷第4期页码：354-356
纸质出版日期： 2015 ，
DOI： 10.15980/j.tzzz.2015.04.006

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[1]张忠诚,张枫霞,秦森,王忠民,刘宁,刘宇.NbC、VC对泵用KMTBCr20铸铁组织与性能的影响[J].特种铸造及有色合金,2015,35(04):354-356.

Zhang Zhongcheng, Zhang Fengxia, Qin Sen, et al. Effect of NbC and VC Particles on Microstructure and Properties of KMTBCr20Cast Iron Used for Pump[J]. Special Casting & Nonferrous Alloys, 2015,35(4):354-356.
[1]张忠诚,张枫霞,秦森,王忠民,刘宁,刘宇.NbC、VC对泵用KMTBCr20铸铁组织与性能的影响[J].特种铸造及有色合金,2015,35(04):354-356. DOI： 10.15980/j.tzzz.2015.04.006.

Zhang Zhongcheng, Zhang Fengxia, Qin Sen, et al. Effect of NbC and VC Particles on Microstructure and Properties of KMTBCr20Cast Iron Used for Pump[J]. Special Casting & Nonferrous Alloys, 2015,35(4):354-356. DOI： 10.15980/j.tzzz.2015.04.006.

摘要

以洗煤泵用KMTBCr20抗磨白口铸铁为研究对象

研究了NbC、VC外加颗粒对铁水的作用效果。结果表明

外加颗粒可抑制晶体长大

显著细化组织和提高材料的力学性能。当添加0.1%的VC时

效果最佳

碳化物得以细化、钝化

使材料具有高硬度的同时还具有高的韧性。材料的硬度（HRC）和冲击韧度（αk）比未添加外加颗粒时分别提高了14.5%和92.5%

使得洗煤泵的有效工作时间由2 800h增至4 200h。

Abstract

Effects of NbC

VC particle additions on KMTBCr20 cast iron for pump were investigated.Experimental results show that the added particles can inhibit the grain growth and significantly refine microstructure and improve the mechanical properties of the cast iron.With adding 0.1%VC

carbides are refined and blunted

which takes the cast iron high hardness and toughness.The hardness（HRC）and impact toughness（αk）of the cast iron with adding VC particles are increased by 14.5% and by 92.5%

respectively

compared with that without particles addition.Product assessment shows that the service life caused by failure（fracture and wear）is improved

and working time is increased from 2 800hto4 200 hunder the coal washing condition.