In order to get uitrafine grain ferrite, the iron and steels must have a great distortion.
要想得到超细晶铁素体组织,必须对钢铁材料进行较大程度的变形。
参考来源 - 铁素体不锈钢晶粒细化及耐腐蚀性研究·2,447,543篇论文数据，部分数据来源于NoteExpress
N-PLURAL shares and bonds of steel companies 钢铁公司股票 [stock exchange]
The resulting steel appears to achieve a combination of strength and toughness that is comparable to that of modern steels that are very rich in alloy content and, therefore, very expensive.
由此产生的钢似乎达到了强度和韧性的结合，这与合金含量非常高因而非常昂贵的现代钢相当。
Specifications frequently state that capped steels may be used in certain fabrications.
规范经常表明，在某些制造中可以使用加盖钢。
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