Effects of TiC Volume Fraction on the Microstructure and Friction Properties of In-Situ Titanium Matrix Composites

Zheng Bowen; Dong Fuyu; Zhang Yue; Sun Liang; Yuan Xiaoguang; Huang Hongjun; Zuo Xiaojiao

doi:10.15980/j.tzzz.2018.07.003

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Effects of TiC Volume Fraction on the Microstructure and Friction Properties of In-Situ Titanium Matrix Composites
Vol. 38, Issue 7, Pages: 705-708(2018)
Published： 2018 ，
DOI： 10.15980/j.tzzz.2018.07.003

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[1]郑博文,董福宇,张悦,孙亮,袁晓光,黄宏军,左晓姣.TiC含量对原位钛基复合材料组织与摩擦性能的影响[J].特种铸造及有色合金,2018,38(07):705-708.

Zheng Bowen, Dong Fuyu, Zhang Yue, et al. Effects of TiC Volume Fraction on the Microstructure and Friction Properties of In-Situ Titanium Matrix Composites. [J]. Special Casting & Nonferrous Alloys 38(7):705-708(2018)
[1]郑博文,董福宇,张悦,孙亮,袁晓光,黄宏军,左晓姣.TiC含量对原位钛基复合材料组织与摩擦性能的影响[J].特种铸造及有色合金,2018,38(07):705-708. DOI： 10.15980/j.tzzz.2018.07.003.

Zheng Bowen, Dong Fuyu, Zhang Yue, et al. Effects of TiC Volume Fraction on the Microstructure and Friction Properties of In-Situ Titanium Matrix Composites. [J]. Special Casting & Nonferrous Alloys 38(7):705-708(2018) DOI： 10.15980/j.tzzz.2018.07.003.

摘要

采用原位自生熔铸法制备以纯钛和石墨粉为原料

TiC增强相含量分别为2%、4%、6%、8%、10%的钛基复合材料。研究了TiC增强相体积分数对钛基复合材料组织形貌及摩擦性能的影响。结果发现

随着增强相含量的增加

TiC形态由纤维状

短棒状逐渐生长为枝晶状形态

硬度（HRC）从30.8提高到46.2。当TiC增强相的含量为6%时

硬度达到最大值。在载荷为100N、转速为100r/min条件下

与Cr12MoV钢对磨的平均摩擦因数从0.46下降到0.37。钛基复合材料与Cr12MoV钢的干滑动摩擦磨损机制随着TiC增强相含量增加

由严重的粘着磨损、氧化磨损逐渐转变为轻微粘着磨损

磨粒磨损和氧化磨损。

Abstract

The TiC particulate-reinforced titanium matrix composites（TMCs）were fabricated by in situ synthesis using pure titanium and graphite powder.The calculated volume fraction of reinforced phase TiC was 2%

10%

respectively.The effect of the TiC volume fraction on the microstructure and friction properties of titanium matrix composites were investigated.The results show that with TiC content increase

the morphology of TiC in the matrix alloy is transformed from fibous

short rod structre into dendritic structure

and hardness is increased from 30.8 HRC to 46.2 HRC.When the volume fraction of TiC is 6%

the hardness reaches the maximum and the average friction coefficient of wearing against Cr12MoV steel is decreases from 0.46 to 0.37 at 100 Nand 100 r/min.The main mechanism of dry sliding friction and wear against Cr12MoV steel is transformed from severe adhesion wear and oxidation wear to slight abrasive wear

adhesion wear and oxidation wear with increasing in TiC content.