非调质易切削钢38MnVS连铸坯的高温延塑性  

Elevated Temperature Ductility of Cast Bloom of Non-Quenched and Tempered Free Cutting Steel 38MnVS

作　　者：赵艳宇[1] 李国忠[1,2] 王福明[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]兴澄特钢公司,江阴214429

出　　处：《特殊钢》2009年第4期17-18,共2页Special Steel

摘　　要：应用Gleeble 1500D热模拟试验机,研究了非调质易切削钢38MnVS(%:0.42C、1.29Mn、0.09V、0.067S)370 mm×490 mm连铸坯的高温延塑性及变形断裂机理。结果表明:38MnVS钢的零强度温度(ZST)为1 370℃和零塑性温度(ZDT)为1335℃;38MnVS钢在熔点(T_S)到600℃的温度区间内存在2个脆性区,第Ⅰ脆性温度区为T_S～1250℃,第Ⅲ脆性温度区为875～600℃,因此,该钢连铸坯的矫直温度应在875℃以上。Elevated temperature ductility and deformed fracture mechanism of 370 mm × 490 mm cast bloom of nonquenched and tempered free cutting steel 38MnVS （% ： 0. 42C, 1.29Mn, 0. 09V, 0. 067S） have been studied by Gleeble 1500D thermal simulator. Results showed that the Zero Strength Temperature （ZST） and Zero Ductility Temperature （ZDT） of steel 38MnVS were respectively 1 370 ℃ and 1 335 ℃ ; there were two brittle zones for steel 38MnVS in temperature range from melting point Ts to 600 ℃ i.e. brittle zone Ⅰ - Ts - 1 250 ℃ and brittle zone Ⅲ 875 - 600 ℃ , therefore the straightening temperature of cast bloom of the steel should be more than 875 ℃.

关 键 词：非调质钢38MnVS 连铸坯 高温延塑性 

分 类 号：TF777[冶金工程—钢铁冶金]