Using the state of the organization for the fine grain ferrite pearlite, strength than ordinary carbon structural steel Q235 about 20% ~ 30%, high atmospheric corrosion resistance of 20% ~ 38%.
使用状态的组织为细晶粒的铁素体—珠光体，强度比普通碳素结构钢Q235高约20%～30%，耐大气腐蚀性能高20%～38%。
It is found that the weld of fine grain steel break apart from heat effect zone in the tensile test.
经实验发现细晶粒碳钢焊接接头拉伸试验断口在远离热影响区的母材上。
With the deeper knowledge of ultra fine grain steel, the process of refinement has became one of the main methods to increase mechanical properties of steel availably nowadays.
随着对超细晶粒钢性能了解的逐渐深入，组织细化技术已经成为当今钢铁行业有效提高钢铁机械性能的重要方法之一。
The microstructure and fine structure of weld fusion zone for high strength fine grain steel were studied.
研究了高强度细晶粒碳素钢焊接接头熔合区附近的显微组织及精细结构。
The coarse grain zones of laser welded joint of super fine grain steel show good toughness.
超细晶粒钢激光焊接接头粗晶区有较好的韧性。
This paper introduces the development and the application of the ultra fine grain C-Mn steel in BAO steel.
本文简要介绍了宝钢碳锰超细晶粒钢的研制及应用。
The results showed that as the content of Ti increasing , fine precipitates distribute dipersely, grain fine and age - hardening enhanced in the steel, so tensile strength in this steel is improved.
研究发现，钛含量增加，使钢中获得细小沉淀物的弥散分布，细化晶粒，增强时效硬化，从而提高该钢的抗拉强度。
In this paper, the grain growth in the HAZ of three kinds of ultra - fine grain steels such as low carbon steel, commercial X65 steel and high purity X65 steel were evaluated.
研究了低碳钢、普通市售x65钢和高洁净度X65钢三种超细晶粒钢焊接haz的晶粒长大倾向。
Ultra steel is characterized by its higher cleanness and ultra-fine grain, thus it has higher strength, toughness and longer life even without addition of more alloying elements.
超级钢的主要特征是高洁净度和超细晶粒组织，在不增加任何合金元素的情况下，其强度、韧性和使用寿命提高一倍。
The grain size of steel is grade of 8 and it attributes to fine grain steel. The grain size and grain uniformity are greatly improved as well.
晶粒度达到8级，属于细晶粒钢，其晶粒度和晶粒均匀性都大大提高。
The simulations of austenite grain growth in HAZ of ultra-fine grain steel make foundation for future research work.
本文的研究结果将有助于新一代钢铁材料焊接HAZ组织模拟的进一步研究。
The results show that adding medium carbon nucleating agents into high carbon steel grade can effectively enlarge equiaxed grain zone and fine grain size;
研究结果表明，向钢液中加入形核剂可有效地扩大等轴晶区。
The results show that adding medium carbon nucleating agents into high carbon steel grade can effectively enlarge equiaxed grain zone and fine grain size;
研究结果表明，向钢液中加入形核剂可有效地扩大等轴晶区。
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