Through flow line distribution and fiber contexture of inner material point obtained from no-flash die forging test, the forged gears with high quality grade was explained.

• 通过铅试件网格试验，揭示出在闭塞模锻中金属内部质点的流动规律、金属流线分布趋势及纤维状况，说明了锻造齿轮内在质量高的原因；