Pilot run process of 20MnVB bar with continuous cast—rolling by one time heating, results of pilot run were introduced.

In order to realize the roll in one heat in Small Section Plant of Nanchang Iron and Steel Co ,the Φ540mm roughing was added and the heavy reduction was applied The processing parameters design and pass system were introduced as well as the obtained good effect

Reformation of roll in one heat of continuous casting billet for open train mill has been done in the No.

According to present equipment condition Shiheng special steel plant produces 50kg/m jointing clamping plate used of 150mm×150mm continuous casting billet and “roll in one heat” process Through reasonable collocating pass and rolling process the rolling production is stable,the product accords with the standard TB/T2342-93 and G13 699-88,and the production cost is decreased by 200 yuan/t(RMB

The technique reformation of double due wire mill for rolling without reheating;

This paper introduces the practical experience that more thirty varieties and specifications of spring flat are produced using semi-continuous rolling and rolling without reheating from 140mm ×140mm cast square billets.

The design of direct rolling process in the Shanghai Pudong Iron and Steel Co., Ltd;

As the raw material of 75mm×75mm square billet is changed into 100mm×100mm continuous casting billet in rolling plant of Tai Mountain iron and steel group general corporation,the production process of “once heating into product” is achieved by reasonable roll passesdesign,reforming rolling mill,adding disc shearer and reforming throwing mechanism of cold beds,etc.

The reforming of once heating into product of continuous casting billet is done in 400mm×2/250mm×5 small section plant of Shiheng special steel works.