图书来源:二元合金相图及中间相晶体结构 二元合金相图及中间相晶体结构
作 者:唐仁政 田荣璋
出版时间:2009-05
定 价:320元
图书ISBN:978-7-81105-831-4
出版单位:中南大学出版社
Yong Chen1,2) ,Guo-rong Wu2) ,and Miao-yong Zhu1) 1) Materials and Metallurgy School,Northeastern University,Shenyang 110004,China 2) Department of Material Research,Panzhihua Iron and Steel Research Institute,Panzhihua 617000,China
摘 要:To reduce surface depression of a bloom,the primary cooling intensity was decreased,and the water distribution of mold wide and narrow faces was optimized. The length of secondary cooling zones and the specific water flow were increased,and the water flow distribution among the secondary cooling zones was adjusted to eliminate central defects,such as center looseness,central segregation,and center line cracks. The operation showed that the proportion of surface depression decreased from 37.22% to 2.87%,whereas the proportion of center looseness for ≤1.0 increased from 79.71% to 90.70%,the proportion of central segregation for <0.5 increased from 1.45% to 44.19%,and the proportion of center line cracks that are free increased from 39.13% to 62.79%. The qualified blooms are delivered to produce 310 Z-beam,whose yield strength is greater than 450 MPa.
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