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何谓金属塑性变形件的“纤维组织”?具有“纤维组织”的金属有何特性?何谓“纤维组织”利用原则。
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何谓金属塑性变形件的“纤维组织”?具有“纤维组织”的金属有何特性?何谓“纤维组织”利用原则。
时间:2022-02-27 19:55
关键词:
材料成型工艺学
材料科学
大学试题
理学
答案解析
<p> 纤维组织:铸锭在压力加工中产生塑性变形时,基体金属的晶粒形状和沿晶界分布的杂质形状都发生了变形,它们将沿着变形的方向被拉长,呈纤维形状,这种组织叫纤维组织特性:具有纤维组织的金属各个方向的机械性能不同,顺着纤维方向的机械性能比垂直纤维方向的好。利用原则:使纤维分布与零件的轮廓相符合而不被切断;使零件所受最大拉应力与纤维方向一致,最大切应力与纤维方向垂直。</p>
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金属在塑性变形后产生的纤维组织能使金属具有各向异性。
何谓金属塑性变形件的“纤维组织”?具有“纤维组织”的金属有何特性?何谓“纤维组织”利用原则。
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