Controling conditions of production process to obtain developed isometric dendrite structure is one of the important measures to increase the strength property of gray iron.
控制生产工艺条件，获得发达等轴枝晶组织，是提高灰铸铁强度性能的重要技术措施之一。
2
Based on analyzing the structure of practicable isometric profile, the radius calculating formula of bigger arc and the mathematical model of practicable isometric-trilateral profile are reduced.
从分析实用等距曲线的构成入手，推导出了实用三弧段等距型面的大圆弧半径计算公式和型面曲线的数学模型。
3
The weld nugget had a dynamic recrystallized, fine isometric crystal structure.