论文部分内容阅读
实验中通过测量铸锭的二次晶轴间距、莱氏体网络尺寸及计算局部凝固时间考察了熔化速度、熔池深度对电渣重熔高速钢凝固质量的影响。由热平衡推导将影响局部凝固时间的因素概括为熔速和钢锭直径,并得出了电渣重熔高速钢的局部凝固时间、熔速和钢锭直径间的回归方程 t_r=0.24+1.28×10~(-3)D~2/V_Z~2+2.28×10~(-5)D~4V_Z局部凝固时间取得最小值时的熔速为 V_Z~* =(112.28/D~2)~(13)通过工厂实验得出了控制局部凝固时间,改善高速钢的凝固质量可以提高钢材的质量,通过不同重熔工艺的比较得出在电渣重熔过程中影响熔速的主要因素是输入功率。
In the experiment, the influences of the melting rate and the depth of the weld pool on the solidification quality of the ESR HSS were investigated by measuring the secondary crystal axis spacing of the ingot, the size of the ledeburite network and the calculation of the local solidification time. The factors that influence the local solidification time are summarized as the melt speed and ingot diameter deduced from the thermal balance. The local solidification time of the ESR HSS is obtained. The regression equation between the melt speed and ingot diameter is t_r = 0.24 + 1.28 × 10 ~ (-3) D ~ 2 / V_Z ~ 2 + 2.28 × 10 ~ (-5) D ~ 4V_Z When the local solidification time reaches the minimum, the melt velocity is V_Z ~ * = (112.28 / D ~ 2) The experimental results show that the control of the local solidification time can improve the quality of the steel by improving the solidification quality of high-speed steel. The main factor affecting the melt speed in the ESR process is the input power through the comparison of different remelting processes.