Method for improving plate shape of quenched and tempered high-alloy medium plate

• Main Authors: GU ZIYOU, WU YANYANG, ZHAO ZIJUAN, LI YANGBING, YUE XINXIN, YIN WEIJIANG, LIU SHENG, ZHAO GUOCHANG, LONG JIE, NIU HONGXING, YUAN JINCHENG, CHEN QI, PANG HUIYONG, HOU JINGCHAO
• Format: Patent
• Language: Chinese; English
• Published: 10.01.2023
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; PERFORMING OPERATIONS; PUNCHING METAL; ROLLING OF METAL; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a method for improving the plate shape of a quenched and tempered high-alloy medium plate, and belongs to the technical field of ferrous metallurgy. The method comprises the steps of quenching, rolling, straightening and heating. In the quenching process of the steel plate, the ratio of lower water to upper water of a quenching machine is 1.35-1.45, and the roller speed of the quenching machine is 2-7 m/min; in the rolling process, the initial rolling temperature of finish rolling is 900-960 DEG C. The steel plate produced by the invention has no defects of edge waves and head and tail warping; the unevenness of the steel plate is controlled within 6 mm/1 m and 10 mm/2 m; the steel plate is good in performance, the impact property at-196 DEG C is larger than or equal to 100 J, the yield strength is 600-630 MPa, and the tensile strength is 710-740 MPa. 本发明公开了一种改善高合金中板调质处理后板型的方法，属于钢铁冶金技术领域。方法包括淬火、轧制、矫直、加热工序；淬火工序：钢板淬火过程中淬火机下上水比1.35～1.45，淬火机辊速为2～7m/min；所述轧制工序：精轧开轧温度为900～960℃。本发明生产的钢板，钢板无边浪