Research on Rolling Process with Planar Arc Flat Steel
Developing multi-dimension Planar Arc Flat Steel(PAFS)without changing the equipment for rolling round steel in the No.3 wire factory which belongs to Xiangtan Iron & Steel CO.,LTD.of Hunan,consisted of three series,adop-ting a circular-flat-flat-vertical-flat mode.In this mode,the same series only shares the vertical rolling pass of the adjusted material type.Different series only replace a small number of rolling stands to maximize production capacity advantages.The thickness of PAFS is controlled within±0.2 mm,the width is controlled within±0.4 mm,side bending is ≤2 mm/m,and the plane bending is 2～3 mm/m.There is no folding defect caused by rolling in PAFS.The 51CrV4 PAFS with a decarburization layer of ≤0.30 mm is obtained,due to the heating process controls the heating section at 1030±20 ℃,and after a total in reheating furnace time of ≤300 minutes.And the matrix structure is mainly composed of sorbite,pearli-te,and a small amount of ferrite in the 51CrV4 PAFS,with Hot Rolled Hardness ≤300 HB,Yield Strength of 1650 MPa,Elongation After Fracture of 9.7％,and Section Elongation of 43.64％.
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