%0 Journal Article
%T THE DISSOLUTION AND PRECIPITATION OF BORON CONSTITUENT AND THEIR EFFECTS ON THE PROPERTIES OF 40MnB STEEL<br>
%A Res Gp of Boron Steels
%A Beijing Steel Works
%A Central Iron
%A Steel Research Institute
%A Ministry of Metallurgical Industry
%A <br>
%J 金属学报
%D 1979
%I 
%X The effects of dissolution and precipitation of M_(23)(C,B)_6 during heating athigh temperature and cooling subsequently upon the properties of medium carbonsteel 40MnB containing different amounts of boron have been investigated by meansof quantitative phase analysis and boron-autoradiography. The volume fraction andgrain size of M_(23)(C,B)_6 precipitate may be increased with the increase of boroncontent and with the decrease of cooling rate. Although the steels contained dif-ferent amounts of boron, a same critical cooling rate may be appeared at whichM_(23)(C,B)_6 precipitate reached to saturation. The dissolution and precipitation ofM_(23)(C,B)_6 are deeply affected the hardenability and toughness of the steels. Underthe same condition, M_(23)(C,B)_6 in steels containing less boron may be precipitatedout in smaller size and easily dissolved. Thus, they exhibited better combinedproperties and less sensitivity to the change of heat history. Suggestion on stabi-lizing the properties of the steels has been made.
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=08A16A338D2E199AF2330BE075C2FE04&yid=8C8371356FB4C85C&vid=23CCDDCD68FFCC2F&iid=E158A972A605785F&sid=60E9AACF61B3107F&eid=E543FC2C7CA75C74&journal_id=0412-1961&journal_name=金属学报&referenced_num=0&reference_num=0