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.
The results show that mechanical properties of the pipe were improved greatly by new technique, and grain size refined, microstructure improved, residual stress and energy consumption reduced.
结果表明，新工艺可明显提高产品的力学性能、细化晶粒、改善组织、减小应力，并降低了能耗。
3
The forces of the main fixed support in water pipe system and items of selection of metal wave grain tube were introduced.