Study on Microstructure and Mechanical Properties of New High Carbon-chromium and Low Nickel Steel
Based on the working condition requirements of wear-resistant and heat-resistant steel,the chemical composition of the steel was designed reasonably.And a new type of high carbon-chromium and low nickel steel was prepared by using common casting process,then the as-cast microstructure and mechanical properties were investigated.The results show that,the as-cast microstructure of the steel is composed of blocky austenite and net carbide distributes along the austenite grain boundary,but no precipitated phase appears in the austenite grain.The steel has good impact resistance with toughness of 5.4 J/cm2,but poor hardness with the value of 36.5 HRC.