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鞍鋼第二初軋厂和中板厂进行了余热淬火的初步試驗,取得了比較满意的結果。第二初軋厂用三号甲类沸騰鋼、厚18毫米的鋼板进行了試驗。在軋完温度830℃时,立即噴水冷却,一边噴水一边平正矯直,板形合格,其抗拉强度和屈服点比标准規定提高25％左右,延伸率稍有下降,而冷弯仍合格。中板厂用三号甲类沸騰鋼,厚度为6、8、10、12毫米的鋼板进行試驗。在軋完温度800～920℃时,噴水冷却。由于鋼板校薄,噴水后瓢曲較大,但增加矯直次数后,板形仍然合格。其他性能与第二初軋厂試驗結果基本相同。从上述两厂試驗結果看,这两种普通碳素鋼已达到普通低合金鋼09Mn2的水平。从金相組織看,噴水能使晶
Anshan Iron and Steel Company, the first two secondary mill and residual heat quenching of the initial test, and achieved satisfactory results. The second primary rolling mill with a Class A boiling steel, 18 mm thick steel plate was tested. At the finish rolling temperature of 830 ℃, it was sprayed and cooled immediately. While watering, the casting was straightened out and its shape was passed. The tensile strength and yield point increased about 25% compared with the standard, the elongation decreased slightly and the cold bend was still acceptable. Plate factory with three Class A boiling steel, the thickness of 6,8,10,12 mm plate for testing. In the rolling temperature of 800 ~ 920 ℃, spray cooling. As a result of the thinning of the steel sheet, the buckle curvature is larger after the water jetting but the shape of the sheet is still acceptable after increasing the straightening times. Other properties and the results of the second preliminary mill test is basically the same. From the above two plant test results, these two ordinary carbon steel has reached the level of ordinary low-alloy steel 09Mn2. From the metallographic organization, water can make crystal