Reliability evaluation of hardness test methods of hardfacing coatings with hypoeutectic and hypereutectic microstructures  

作　　者：Nilay Comez Can Civi Hulya Durmus 

机构地区：[1]Department of Metallurgical and Materials Engineering,Manisa Celal Bayar University,Manisa 45140,Turkey [2]Department of Mechanical Engineering,Manisa Celal Bayar University,Manisa 45140,Turkey

出　　处：《International Journal of Minerals,Metallurgy and Materials》2019年第12期1585-1593,共9页矿物冶金与材料学报（英文版）

摘　　要：Hardfacing coatings involve hard carbide/boride phases dispersed in a relatively soft steel matrix.For the hardness measurements of hardfacing coatings,depending on the microstructure,both the hardness test method and the applied load affect the hardness results;therefore,they affect the wear performance predictions of the coating.For this reason,the proper hardness test method should be determined according to the microstructure of the coating,and the reliability of the obtained hardness data should be established.This study aimed to determine the most suitable hardness test method for hypoeutectic and hypereutectic microstructures of hardfacing coatings by analyzing the reliability of Rockwell-C and Vickers hardness test results.Reliability analyses showed that Rockwell-C is not a suitable hardness test method for hypereutectic hardfacing coatings.Based on the relationship between wear resistance and hardness,Vickers hardness method was found more suitable for the considered materials.Hardfacing coatings involve hard carbide/boride phases dispersed in a relatively soft steel matrix. For the hardness measurements of hardfacing coatings, depending on the microstructure, both the hardness test method and the applied load affect the hardness results; therefore, they affect the wear performance predictions of the coating. For this reason, the proper hardness test method should be determined according to the microstructure of the coating, and the reliability of the obtained hardness data should be established. This study aimed to determine the most suitable hardness test method for hypoeutectic and hypereutectic microstructures of hardfacing coatings by analyzing the reliability of Rockwell-C and Vickers hardness test results. Reliability analyses showed that Rockwell-C is not a suitable hardness test method for hypereutectic hardfacing coatings. Based on the relationship between wear resistance and hardness, Vickers hardness method was found more suitable for the considered materials.

关 键 词：HARDFACING HARDNESS measurement reliability CARBIDE BORIDE wear 

分 类 号：TG1[金属学及工艺—金属学]