公开(公告)号：US20140076471A1

公开(公告)日：2014-03-20

申请号：US14028588

申请日：2013-09-17

Applicant: ATI PROPERTIES, INC.

Inventor： Robin M. Forbes Jones ,  John V. Mantione ,  Urban J. DeSouza ,  Jean-Philippe Thomas ,  Ramesh S. Minisandram ,  Richard L. Kennedy ,  R. Mark Davis

IPC: C22F1/18

CPC classification number: C22F1/183 ,  B21J1/003 ,  B21J1/025 ,  B21J1/06 ,  C22C14/00

Abstract: Methods of refining the grain size of titanium and titanium alloys include thermally managed high strain rate multi-axis forging. A high strain rate adiabatically heats an internal region of the workpiece during forging, and a thermal management system is used to heat an external surface region to the workpiece forging temperature, while the internal region is allowed to cool to the workpiece forging temperature. A further method includes multiple upset and draw forging titanium or a titanium alloy using a strain rate less than is used in conventional open die forging of titanium and titanium alloys. Incremental workpiece rotation and draw forging causes severe plastic deformation and grain refinement in the titanium or titanium alloy forging.

Abstract translation: 精炼钛和钛合金晶粒尺寸的方法包括热管理的高应变率多轴锻造。 高应变率在锻造期间绝热加热工件的内部区域，并且使用热管理系统将外表面区域加热到工件锻造温度，同时使内部区域冷却至工件锻造温度。 另外的方法包括使用小于用于钛和钛合金的常规开模锻造中的应变速率的多个镦锻和拉伸锻造钛或钛合金。 增加的工件旋转和拉伸锻造会导致钛或钛合金锻造中严重的塑性变形和晶粒细化。