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在世界范围内,各国的低合金钢都存在热轧带钢同卷强度差别大的问题,尤以钛钢为甚。 鞍钢1973年开始生产汽车用含钛热轧钢带,限于设备条件,一直采用轧后空冷工艺,因此同卷强度差很大,10Ti钢同卷强度差最高可达25MN/m~2。经使用正确的冷却制度,可显著降低同卷强度差,同卷强度差Δσs≤9MN/m~2。减少同卷强度差可提高板
In the world, low-alloy steel in all countries there is the difference between the strength of hot-rolled strip volume, especially titanium steel is even worse. Angang started producing automotive titanium-containing hot-rolled steel strip in 1973. Due to the limited equipment conditions, Anshan Iron & Steel Co., Ltd. has been using air-cooling after rolling process. Therefore, the strength of the same roll is very poor. The difference in strength between 10Ti steel and the same roll can reach 25MN / m ~ 2. By using the correct cooling system, it can significantly reduce the difference between the same roll strength, the same roll strength difference Δσs ≤ 9MN / m ~ 2. Reduce the same roll strength difference can improve the board