锻压技术

高耐蚀型耐候钢S450EW热轧工艺及腐蚀性能

英文标题：Hot rolling process and corrosion properties for high corrosion resistant weathering steel S450EW

作者：张慧菊李春辉

单位：厦门工学院

分类号：TG335

出版年,卷(期):页码：2020,45(7):198-202

摘要：

制定了S450EW高耐蚀型耐候钢的热轧工艺，具体为：加热—粗轧—精轧—层流冷却—卷取，粗轧材料厚度控制值为40 mm，温度控制在（1050±20） ℃范围内，精轧材料厚度控制值为7 mm，温度控制在（870±20） ℃范围内，并对不同热轧工艺的样品进行金相试验及力学性能检测，以确定各工艺参数的设定范围。同时，完成S450EW钢的腐蚀性能验证，将试验钢的轧制成品径线切割为70 mm×50 mm×3.5 mm的板状，并在Fl-65型干湿周期浸润腐蚀试验机内进行试验。结果表明，S450EW钢的两种试验样品的平均腐蚀率分别为1.770和1.839 g·m-2·h，明显小于参比钢Q345试样的平均腐蚀率2.909 g·m-2·h。

The hot rolling process of high corrosion resistant weathering steel S450EW was made with heating-rough rolling-finishing rolling-laminar cooling-coiling. The thickness control value of rough rolling material was 40 mm with the temperature of (1050±20) ℃, and the thickness control value of finishing rolling material was 7 mm with the temperature of (870±20) ℃. Then, the samples of different hot rolling processes were subjected to metallographic test and mechanical property test to determine the setting range of each process parameter. Meanwhile, the corrosion property verification of S450EW steel was completed, the rolled product of test steel was cut into a plate shape with 70 mm×50 mm×3.5 mm by wire cutting, and the test was made in the FL-65 dry and wet periodic infiltration corrosion testing machine. The results shows that the average corrosion rates of two test samples of S450EW steel are 1.770 and 1.839 g·m-2·h respectively, which is significantly lower than the average corrosion rate of 2.909 g·m-2·h for reference Q345 steel sample.

基金项目：

福建省教育厅中青年教师教育科研项目（JAT160630）

张慧菊（1987-），女，硕士，讲师 E-mail：307787273@qq.com

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