分析了传统的焊接热影响区（HAZ）晶粒长大模型，在此基础上，介绍了适用于高强度管线钢的奥氏体晶粒长大的耦合模型。
In this paper, the traditional HAZ grain growth model is analyzed. Based on the model, analytical model of austenite grain growth fit to high strength pipe-steel is introduced.
针对传统上高锰钢作为履带板材料在实际应用中的不足，研究了一种新型的铸造m - B低合金高强度耐磨钢。
A kind of new M-B low-alloy wear resistance steel with high strength has been studied to overcome the deficiency of traditional high-manganese steel used in making grippad.
象传统铲斗一样，锥形铲斗也在需要的部位使用高质量的，既具有高强度又耐腐蚀的调质钢。
As with conventional bucket, the taper bucket is manufactured from high quality quench and tempered steels allowing for high strength, as well as high abrasiveness in required areas.
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