张婷,魏明安,陈经华.纳米改性对含碳化物的等温淬火球墨铸铁磨球金相组织的影响[J].矿冶,2019,28(3):.
纳米改性对含碳化物的等温淬火球墨铸铁磨球金相组织的影响
The Nano-Modification Effect of Microstructure of CADI Grinding Ball
投稿时间:2018-05-18  修订日期:2018-05-28
DOI:
中文关键词:  半自磨  磨球  纳米改性  球墨铸铁  金相组织
英文关键词:SAG  Grinding Balls  Nano-modification technique  CADI  Microstructure
基金项目:丰台区科技型中小企业创新基金
        
作者单位
张婷 北京环磨科技有限公司
北京耐磨标准技术有限公司
魏明安 北京环磨科技有限公司
北京环磨矿冶能效技术研究院有限公司
陈经华 北京环磨矿冶能效技术研究院有限公司
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中文摘要:
      针对大型半自磨机现用磨球磨耗高、破碎率高的现状,研究了纳米改性和高温预处理对含碳化物的等温淬火球墨铸铁磨球金相组织的影响。试验结果表明:随着纳米改性剂加入量的增加,石墨球趋向圆整化、细小化和分布均匀化;碳化物趋向细小化和分布均匀化;高温预处理使碳化物数量减少,边界钝化,短杆状向球形过渡。优化后的金相组织细小均匀,对提高磨球的耐磨性及抗破碎能力极为有利。
英文摘要:
      According to the high metal consumption of large-scale semi-autogenous grinding (SAG) system, the modification effect of nano-modification technique on the microstructure of carbidic austempered ductile iron (CADI) grinding ball have been investigated. The results indicate that with the increase of the nano-modifier, the size of the graphite ball in CADI grinding ball is reduced, circularity increased, the number of graphite spheres are increased; similarly the carbide has highr dispersion degree, finer size. High-temperature pretreatment reduce the number of carbides, passivate boundary, transform short rods into round. The optimized microstructure is fine and uniform, which is very beneficial to improving abrasion resistance and crushing resistance of grinding balls.
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