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二步冷轧对铁素体不锈钢深冲性能和织构的影响
  • 期刊名称：东北大学学报(自然科学版), 2010, 31(3): 366-369.
  • 时间：0
  • 分类：TG335.1[金属学及工艺—金属压力加工]
  • 作者机构：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110004, [2]宝山钢铁股份有限公司研究院,上海200431
  • 相关基金：国家自然科学基金资助项目（50734002）.
  • 相关项目：超纯铁素体不锈钢微合金化机理
关键词： 深冲性能, 二步冷轧, 织构, 铁素体不锈钢, deep drawability, two-step cold rolling, texture, ferritic stainless steel
中文摘要：

比较了一步冷轧和二步冷轧对铁素体不锈钢深冲性能和织构的影响.结果显示,采用一步冷轧（冷轧压下率90%）后,获得了高的平均r值（rm=1.92）,且45°方向的r值要大于轧向和横向的r值,导致了材料的Δr呈负值（Δr=-0.31）;在总压下率一定的情况下,采用二步冷轧后,薄板的平均r值变化不大（rm=1.90）,但材料的平面各向异性很小（Δr=0.14）.对两种工艺的再结晶织构分析表明,一步冷轧后薄板生成了强烈的γ织构,但是织构的峰值明显偏离了{111}轴,位于{223}〈582〉处;二步冷轧后薄板则生成了均匀的γ再结晶织构.

英文摘要：

The effects of one-step and two-step cold rolling schedule on deep drawability and texture of ferritic stainless steel were investigated comparatively.The results showed that the high average plastic strain ratio rm=1.92,especially the diagonal r-value at 45°which is higher than either longitudinal or transverse r-value were achieved after the one-step cold rolling with a percentage reduction up to 90%.Thus,the value of planar anisotropy parameter Δr becomes negative,i.e.,Δr=-0.31.With the total reduction kept constant,the average r-value of the sheet as the products from the two-step cold rolling fluctuates little（rm=1.90）with Δr=0.14,a very small value.The analysis results of recrystallization texture revealed that in the sheet from one-step cold rolling an intensified γ texture forms,and its peak value deviates from {111} axial orientation but shift to the orientation {223}〈582〉.However,in the sheet from two-step cold rolling a homogeneous γ recrystallization texture forms.

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超纯铁素体不锈钢微合金化机理
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