改进孔型设计 提高14＃工字钢减重率

为提高14＃工字钢的减重率，石横特殊钢厂中型材车间先后对成品孔、成品前孔和成品再前孔进行改进，使其减重率达到－4．2％以上，并且提高了成品质量，稳定了成品尺寸，孔型磨损减轻，降低了轧辊消耗，工艺合理，中间轧废率由1．2％降至0．27％，各项经济技术是到进一步提高。

Reforming Pass Design Increasing Reducing Weight Ratio of No.14 I Steel

In order to increase the reducing weight ratio of No.14 I steel,the medium section rolling steel workshop of Shiheng special steel plant has done many times reformation to finishing pass,former pass,etc Thus,reducing weight ratio is up to above 4 2%,the product quality is increased,the size of finished product is stabilized,the wear of pass is reduced,and the rolling waste product ratio in production process is decreased from 1 2% to 0 27%