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添加TiC對高鉻鑄鐵性能的影響
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北京交通大學(xué)

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國家自然科學(xué)基金資助(項目號51772020)


Effects of added TiC on properties of high chromium white iron
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Beijing Jiaotong University

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    摘要:

    以TiC粉和高鉻鑄鐵粉(high chromium white iron, 簡稱HCWI)為原料通過熱壓燒結(jié)制備了TiC增強(qiáng)高鉻鑄鐵(TiC/HCWI)復(fù)合材料,研究了TiC增強(qiáng)相對HCWI的微觀組織、物相組成、力學(xué)性能、抗磨性能的影響。結(jié)果表明,添加的TiC顆粒抑制了HCWI材料中M7C3(M=Fe, Cr)碳化物的生長,細(xì)化了HCWI的微觀結(jié)構(gòu)。隨著TiC含量的增加,TiC/HCWI復(fù)合材料的洛氏硬度、斷裂韌性、彎曲強(qiáng)度和抗磨性能增加。利用x-射線衍射和電子掃描電鏡分別對復(fù)合材料的物相組成和微觀結(jié)構(gòu)進(jìn)行了表征；對復(fù)合材料的增強(qiáng)機(jī)制進(jìn)行了分析。

    Abstract:

    High chromium white iron composites reinforced with TiC (TiC/HCWI) were prepared by hot pressing of TiC and high chromium white iron (HCWI) powders. The effects of TiC on microstructure, phase composition, mechanical properties and wear resistance of TiC/HCWI were studied. Results showed that the growth of M7C3(M = Fe, Cr) in HCWI was effectively inhibited by TiC grains, refining the microstructure of HCWI. Rockwell hardness, fracture toughness, flexural strength and wear resistance of the fabricated composites increased with increasing the content of TiC. X-ray diffraction analysis and scanning electron scope were used to characterize the phase composition and microstructure of composites. The reinforcing mechanism of TiC was analyzed.

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姜吉鵬,李世波,胡樹郡,張京,姚伯祥,陸曉剛,于文波,周洋.添加TiC對高鉻鑄鐵性能的影響[J].稀有金屬材料與工程,2020,49(2):701~704.[Jiang Jipeng, Li Shibo, Hu Shujun, Zhang Jing, Yao Boxiang, Lu Xiaogang, Yu Wenbo, Zhou Yang. Effects of added TiC on properties of high chromium white iron[J]. Rare Metal Materials and Engineering,2020,49(2):701~704.]
DOI：10.12442/j. issn.1002-185X. QH20190013

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  • 收稿日期:2019-03-08
  • 最后修改日期:2019-03-08
  • 錄用日期:2019-04-19
  • 在線發(fā)布日期: 2020-03-12
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