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通过测定化学成份和箱式退火条件对铝镇静钢烘烤硬化性和 Snoek 峰值高度的影响,采用箱式退火工艺,生产了抗压痕性极好的作汽车外壳用的烘烤硬化冷轧薄板。发现采用箱式退火工艺,将总碳含量降到0.02%以下,退火温度提高到α/γ临界范围就能生产烘烤硬化薄板。同时发现,添加硅和磷。减少锰含量也能提高烘烤硬化性,烘烤硬化性是由大约10ppm 的固溶碳引起的应变时效产生的,而且表明钢厂能够成功地生产非时效性的,γ值高的烘烤硬化薄板。
The box-type annealed process was used to produce a bake-hardenable cold-rolled sheet for automobile shell with excellent indentation resistance by measuring the effect of chemical composition and box annealing conditions on bake hardenability and Snoek peak height of the aluminum killed steel . The box annealing process was used to reduce the total carbon content to less than 0.02% and to increase the annealing temperature to the critical range of α / γ to produce a bake hardened sheet. Also found that adding silicon and phosphorus. Reduction of the manganese content also enhances bake hardenability, which is caused by strain aging caused by about 10 ppm of solid solution carbon and shows that mills can successfully produce non-aging, high-bake bake hardenability sheet.