%0 Journal Article
%T EFFECT OF W ON MECHANICAL PROPERTIES OF 12%Cr HEAT-RESISTANT STEEL
%A LIU Xingyang Northeast University of Technology
%A Shenyang
%A China FUJITA Toshio The University of Tokyo
%A Tokyo
%A Japan
%A <br>FUJITA
%A Toshio
%J 金属学报(英文版)
%D 1992
%I 
%X The effect of W on mechanical properties of 12% Cr-W-V-Nb heat resistant steel at hightemperatures and room temperature is reported.The experimental results indicated that if theW content was about 2.2—3.0 wt-%,there was no obviously change of R.T.tensile strength,but impact toughness decreased with the rise of W content.On the other hand,the increase ofW content enhanced the short time stress rupture strength,but did not for the long time one.The increase of W have two effects on the precipitation behavior,promoting Laves formationof type Fe_2W,increasing the precipitated phase amount and speeding up the coarsening pro-cess of precipitated phase at high temperatures.The effect of W on the mechanical propertiesis closely associated with precipitation behaviors.When the rupture life is short,there has noenough time to coarsen the precipitated phases,so the increase of precipitated phases results instrengthening effect,i.e.the W increases the high temperature strength.After prolonged expo-sure,the evident coarsening took plaee,that decreased the effect of precipitation.
%K 12%Cr-W-V-Nb steel
%K martensitic heat-resistant steel
%K Laves phase
%K precipitation behavior<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=C19B08D052F5FD8445F4BB80A1A5D7BF&aid=A56A425BC475FFC703A5519464025235&yid=F53A2717BDB04D52&vid=94C357A881DFC066&iid=0B39A22176CE99FB&sid=C36EC077A8A90308&eid=8C83C265AD318E34&journal_id=1006-7191&journal_name=金属学报(英文版)&referenced_num=0&reference_num=5