The microstructures and abrasion wear resistance of directional solidification Fe-B alloy have been investigated using optical microscopy, X-ray diffraction, scanning electron microscopy and laser scanning microscopy....The microstructures and abrasion wear resistance of directional solidification Fe-B alloy have been investigated using optical microscopy, X-ray diffraction, scanning electron microscopy and laser scanning microscopy. The results show that the microstructure of as-cast Fe-B alloy consists of ferrite, pearlite and eutectic boride. After heat treatment, the microstructure is composed of boride and martensite. The plane which is perpendicular to the boride growth direction possesses the highest hardness. In two-body abrasive wear tests, the silicon carbide abrasive can cut the boride and martensite matrix synchronously, and the wear mechanism is micro cutting mechanism. The worn surface roughness and the wear weight loss both increase with the increasing contact load. Moreover, when the boride growth direction is perpendicular to the worn surface, the highest hardness plane of the boride can effectively oppose abrasion, and the martensite matrix can surround and support borides perfectly.展开更多
基金financially supported by the National Natural Science Foundation of China(51641105)the Natural Science Basic Research Plan in Shaanxi Province of China(2014JQ2-5028)+4 种基金the Scientific Research Program Funded by Shaanxi Provincial Education Department(15JK1486)the Open Research Subject of Key Laboratory of Special Materials and Manufacturing Technology in Sichuan Provincial Universities(szjj2016-089)the Huozhou Coal Electricity Group Co.,Ltd.of China(HZMDJSHT20007)the International S&T Cooperation Projects of China(2015DFR50990)the International S&T Cooperation Projects of Qinghai Province(2014HZ819 and 2015HZ811)
文摘The microstructures and abrasion wear resistance of directional solidification Fe-B alloy have been investigated using optical microscopy, X-ray diffraction, scanning electron microscopy and laser scanning microscopy. The results show that the microstructure of as-cast Fe-B alloy consists of ferrite, pearlite and eutectic boride. After heat treatment, the microstructure is composed of boride and martensite. The plane which is perpendicular to the boride growth direction possesses the highest hardness. In two-body abrasive wear tests, the silicon carbide abrasive can cut the boride and martensite matrix synchronously, and the wear mechanism is micro cutting mechanism. The worn surface roughness and the wear weight loss both increase with the increasing contact load. Moreover, when the boride growth direction is perpendicular to the worn surface, the highest hardness plane of the boride can effectively oppose abrasion, and the martensite matrix can surround and support borides perfectly.
基金supported by grants from the National Natural Science Foundation of China(No.81772595)the Sun Yat-sen University Clinical Research 5010 Program(No.2015024)+2 种基金the Natural Science Foundation of Guangdong Province(No.2017A030310204)the Medical Scientific Research Foundation of Guangdong Province(No.A2017545)the Science and Technology Planning Project of Guangdong Province(No.2013B021800146).
基金The present study was funded by grants from the National Natural Science Foundation of China[No.81772595]the Sun Yat-sen University Clinical Research 5010 Program[No.2015024 and 2013013]。
