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％，各项经济技术指标都得到进一步提高。 In order to increase the weight loss rate of 14 # I-beam, Shiheng Special Steel Middle Company Workshop has successively improved finished hole, finished front hole and finished front hole to make the weight loss rate reach -4.2% Improve the finished product quality, stabilize the size of the finished product, reduce the hole wear, reduce the roll consumption, the process is reasonable, the intermediate rolling reduction rate is reduced from 1.2% to 0.27%, various economic and technical indexes have been further improved.