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我国现有二辊式叠轧薄板轧机,只能轧出宽度在1米以下的薄钢板,即使在鞍钢的半连续式轧板机上也只能轧出宽度为1.5米以下的薄钢板。而近代制造汽车、铁路车辆,以及国防工业需用较宽的薄钢板,国内目前还不能生产。据国外杂志报道,近年来美国采用“夹心轧制法”(即以几层中板叠在一起,焊成一块中板坯,轧成钢板后再分层剥离成薄钢板),在现有中板轧机上成功地生产出宽度较大的各种钢号的热轧薄钢板。1963年下半年上钢某厂根据黑色冶金设计总院的建议,在2300中板轧机上试验“夹心轧制法”,取得了初步成功。他们采用的“夹心板叠”是:外面二块厚为25毫米的普通炭素三号钢板,中间夹四块厚为8毫米的30铬锰硅合金结构钢板,在钢板的表面上涂2毫米厚的涂料以防止粘结。他们试轧了8个“夹心板叠”,经过加热、轧制、剪边、剥离后得到厚度为0.6～1.0毫米,宽度为1.3～1.8米的薄钢板32张。经过检验,钢板的表面质量:若只经过横轧的较为平直;若经过纵轧(为
China’s existing two-roll sheet-metal rolling mill, only rolling out the width of 1 meter below the plate, even in Anshan Iron and Steel semi-continuous rolling mill can only roll out a width of 1.5 meters below the sheet. The modern manufacturing of cars, rail vehicles, and defense industries need to use a wider sheet of steel, the current domestic production can not yet. According to foreign magazines, in recent years, the United States adopted the “sandwich rolling method” (that is, stacked in several layers of plates, welded into a slab, rolled into steel and then delaminated into thin steel sheets) Plate mills have successfully produced hot rolled sheets of various steels with wider widths. In the second half of 1963, according to the proposal of the Black Metallurgical Design Institute, a certain mill in Shanghai Steel Co., Ltd. experimented with the “sandwich rolling method” on 2300 medium plate mill and achieved initial success. They used the “sandwich stack” is: outside the two 25 mm thick plain carbon steel No. 3, sandwiching the middle of the thickness of 8 mm thick 30 chromium manganese silicon alloy steel plate, the surface of the steel plate coated with 2 mm thick Paint to prevent sticking. After a series of eight “sandwich panels”, they were heated, rolled, cut, and stripped to yield 32 sheets of steel with a thickness of 0.6-1.0 mm and a width of 1.3-1.8 m. After testing, the surface quality of steel plate: if only after a relatively straight rolling; if after vertical rolling (as