低应变速率下锰硫比对低碳钢高温塑性的影响

Effect of the Mn/S Mass Ratio on the High Temperature Ductility of the Low Carbon Steel under Low Strain Rate

研究了在低应速率下锰硫比对低碳钢高温塑性的影响，实验结果表明，不同测试温度下锰硫比对钢的高温塑性的影响不同。按其影响规律，可分为４个温度区域即：（１）１３５０－１４００℃，锰硫比越高，塑性越差；（２）１０００－１３５０℃，锰硫比对塑性无影响；（３）８００－１０００℃，锰硫比越高，塑性越好；（４）６００－８００℃，锰硫比越高，塑性越差，同时还对锰硫比对高温塑性的影响机理进行了分析。

The effect of the Mn/S mass ratio on the high temperature ductility of the low carbon steel under low strain rate was researched. The result of the experiments shows that the Mn/S mass ratio has different effect on the high temperature ductility of steel under different temperatures. The effect can be classified into four categories: (1 )1 350~1 400℃, the greater the Mn/S mass ratio is, the poorer the ductility is; (2)1 000~1 350℃,the Wn/S mass ratio has no effect on the duchlity; (3)800~1 000℃, the greater the ratio of the Mn versus S is,the better the ductility is; (4)600~800 ℃, the greater the mass ratio of the Mn versus S is, the poorer the ductility is. The mechanism of the effect of the Mn/S mass ratio on the high-temperature ductility is also analyzed.