Influence of Tungsten and Cobalt Contents on the Microstructure Changes and Fracture Behavior of New Carbon-Free Steel-alloy Composites  

作　　者：W.S.Elghazaly O.Elkady 

机构地区：[1]Steel Technology Dept.,CMRDI,PO Box 87,Helwan,Cairo,Egypt [2]Manufacturing Sector,CMRDI,Cairo,Egypt

出　　处：《材料科学与工程（中英文B版）》2018年第5期181-187,共7页Journal of Materials Science and Engineering B

摘　　要：The ever increasing demand for steel materials that have good combinations between strength and toughness urged all researchers working in the field of material science to find new alloys that can approach that requirement.Unfortunately strength and toughness of materials are always counter acting properties.However,carbon contents in the steel define to a great extent its strength and toughness.In this research an effort is paid to produce steel alloy composites that can give higher strength together with good toughness without alloying with carbon.The mechanism of strengthening in Iron-Cobalt-Tungsten composite alloys with variations in Co and W contents is investigated.The fracture toughness and hardness,are measured for all alloy composites under investigation.The changes in microstructures after heat treatment are emphasized using metallurgical microscopy and SEM-aided with EDX analyzing unit.

关 键 词：STEEL ALLOYS precipitation HARDENING carbon-free ALLOYS fracture TOUGHNESS microstructure strengthening composite materials 

分 类 号：TB[一般工业技术]