The Use Of Rolling And Controlled Cooling Technology Research And Application Of The Production Of High Strength Ribbed Bars

Due to there are so many domestic manufactures of small section steel bars that they are faced the crucial market competition. How to produce high performance bars with the lower cost technology became the key to participate in market competition for these enterprises. Moreover, continuous technology progress of steel rolling also accelerated the development on direction to large-scale, high-quality and high efficiency for the production of small section steel bars. It has been become the main tendency to improve products property by means of control cooling, the technology to improve property of ribbed reinforced bar through control cooling has been applied widely. It seems much more important to determine the reasonable and feasible technology of control cooling and rolling base on study the effects of control cooling systematically on property and structure.In this paper, on the basis of combination domestic research with overseas', using laboratorial instruments include infrared thermo-scope, microscope, SEM and tension test machine and so on, the author put up technology design of control cooling after the finishing mill train in No. 1 Small Section Mill of Jigang, furthermore, through the systematical study newly constructed equipment of control cooling after rolling, the author founded the relativity between this process parameters and rebar structure and property, the following results and conclusions can be drawn:1.With designed rebar water cooling device after the finishing mill train, by controlling parameters, such as rolling speed, cooling water flux, hydraulic pressure, and so on, can realize control cooling in rolling process; water cooler adopted turbulent tubes, its characteristic is high cooling efficiency and good uniformity; in the form of collocation, water cooling device should correspond to separate rolling process, and determine relevant cooling regulations; the amount of water tank, water flux and hydraulic pressure etc should be determined to meet different technical needs for diverse steel and specification.2. After the finishing mill train, the produce process of rebar water control cooling heightens mechanics property of ribbed reinforced bar evidently, and the production cost depresses obviously. Under the idiographic process, the trial results show that if the same rolling speed, the rebar mechanical property with water cooling is obvious excelled the rebar mechanical property without...