公开(公告)号：US20160138122A1

公开(公告)日：2016-05-19

申请号：US14038229

申请日：2013-09-26

Applicant: Bell Helicopter Textron Inc.

Inventor： Colin Fletcher

IPC: C21D6/02 ,  C22C38/40 ,  C21D1/18 ,  C21D1/74 ,  C21D6/00 ,  C21D9/00

CPC classification number: C21D6/02 ,  C21D1/18 ,  C21D1/74 ,  C21D6/004 ,  C21D6/04 ,  C21D9/0068 ,  C21D2211/008 ,  C22C38/40

Abstract: In some aspects, a heat treatment process is described for precipitation hardening steel. The heat treatment process can include a solution treatment for a precipitation hardening steel part. The solution treatment includes heating the precipitation hardening steel part to an austenitizing temperature. The heat treatment process can also include a quenching or cooling treatment, in which the precipitation hardening steel part is cooled to a martensitizing temperature. The heat treatment process can also include an aging treatment, in which the precipitation hardening steel part is heated to a temperature of 1000° F. and held at that temperature for five or more hours until a fracture toughness of the precipitation hardening steel part is greater than 120 ksi√in.

Abstract translation: 在一些方面，描述了用于沉淀硬化钢的热处理工艺。 热处理工艺可以包括沉淀硬化钢部件的固溶处理。 固溶处理包括将沉淀硬化钢部分加热至奥氏体化温度。 热处理工艺还可以包括淬火或冷却处理，其中沉淀硬化钢部分被冷却至马氏平
坦化温度。 热处理工序也可以包括时效处理，其中将析出硬化钢部分加热到1000°F的温度，并在该温度下保持5小时以上，直到析出硬化钢部分的断裂韧性更大 超过120ksi√in。