Refinement of austenite grain using uniform experiment design for AISI H13

来源期刊：中南大学学报(英文版)2002年第4期

论文作者：张斌 柳建韬 张鸿冰 阮雪榆

文章页码：239 - 245

Key words：grain refinement; deformation parameter; dynamic recrystallization; uniform design experiment

Abstract: The uniform experiment design is an effective way of optimizing technology scheme for refining the grain size during multistage deformation. In this paper, it is adopted to evaluate the effect of each technology parameter on final grain size ofAISIH13 hot-work tool steel during multistage deformation. It has been verified that the technology scheme for refining the final grain size can be determined rapidly and efficiently with the aid of the uniform design. The results show that the deformation parameters and the intermission time after deformation of the first stage affect the final grain size remarkably. For AISI H13 hot-work tool steel, the final grain size can be refined notably when deformation parameters for the first stage are set as follows: a deformation temperature range of 1 025-1 085℃; a true strain of above 0.26 and the interpass time between the first and the second stage of deformation less than 10 s.