连续挤压成型包覆机挤压轮用钢的热处理工艺.pdf

34 4 Vol34 No4 2009 4 HEAT TREATMENT OF METALS April 2009 , , (武汉科技大学理学院, 湖北武汉 430081) : , NbT iH 13, NbTi, 1 050 30 m i 550 2 h, : ; ; ; : TG17444 : A :2009 Heat treatment of steel for extrusionwheel of ONFORM cladmachine LIU H o gyu, LI Zhe gtao, HUANG Ga g ( College of Scie ce, W uha U iversity of Scie ce a d Tech ology, Wuha H ubei430081, Ch i a) Abstract:The effects of heat treatm e t parameters o m icrostructure a d mecha ical properties of H 13 steel w ith m icroelem e ts of iob ium a d tita ium were i vestigated bym ea s of m icrostructure observatio a d hard ess testThe grai size u iform ity a d fu ctio of iob ium a d tita ium w ere also discussedThe results show that the process of auste itizi g at 1050 for 30m i a d oil que chi g a d tw ice temperi g at 550 2 h ca make the m icrostructure a d mecha ical properties of the test steel comparable to that of steel used i mi ported extrusio wheel K ey words: hot work die steel; heat treatm e t; m icrostructure; m echa ical property ( CONFORM, Co ti uous , , Extrusio Form i g), , , H 13 1 试验材料及方法 CONFORM, 30mm NbT iH 13 [ 1] , [ 2] , H 13 1 1, GB /T 1299! 2000∀ , # 4Cr5MoSVi 1, [ 3] , , 4Cr5MoSVi 1 005% Nb 001% T,i Cr, , NbT iH 13 4Cr5MoSVi 1 1 (, %) Table 1 hem ical composition of the experimental steel(wt%) C Si M P S Cr Mo V Nb T i