%0 Journal Article
%T MICROSTRUCTURE OF LASER MELTED-RESOLIDIFIED LAYER ON HIGH SPEED TOOL STEEL
%A LI Chenglao SHEN Lian LIU Junhai Xi''''an Jiaotong University
%A Xi''''an
%A China
%A <br>LI Chenglao SHEN Lian LIU Junhai Xi''''an Jiaotong University
%A Xi''''an
%A China
%J 金属学报(英文版)
%D 1992
%I 
%X The laser melted-resolidified processing on W18Cr4V high speed tool steel has been made us-ing a 1 kW CO_2 continuous wave laser device.The microstructure of the laser melted-resolidified layer has been examined by optical microscopy and transmission electronmicroscopy(TEM).It was characteristic of extremely fine dendrite in the laser melted-resolidified layer and δ-ferrite in bulk form in the center of dendrite.The predominant twinmartensite and a little dislocation martensite existed in the dendrite.The thin plate-likeM_(213)C_6 carbide precipitated coherently on the twin martensites along their twin plane.Therewere both austenite rich in W,V and Cr and M_6C carbide in the interdendritic regions.
%K high speed tool steel
%K laser surface modification
%K microstructure<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=C19B08D052F5FD8445F4BB80A1A5D7BF&aid=2CA71EB7B98784A4EC0E94E9F726F18F&yid=F53A2717BDB04D52&vid=94C357A881DFC066&iid=CA4FD0336C81A37A&sid=FC0714F8D2EB605D&eid=23CCDDCD68FFCC2F&journal_id=1006-7191&journal_name=金属学报(英文版)&referenced_num=0&reference_num=5