公开(公告)号：WO1995024514A1

公开(公告)日：1995-09-14

申请号：PCT/US1995002705

申请日：1995-03-10

Applicant: REYNOLDS METALS COMPANY

Inventor： REYNOLDS METALS COMPANY ,  ANDERSON, Kevin, R.

IPC: C22F01/04

CPC classification number: C22F1/053

Abstract: A method for the heat treatment of thick 7000 series aluminum alloy products which results in superb corrosion resistance and strength is disclosed. The inventive method consists of processing a 7000 series aluminum alloy to a semi-finished product in the quenched (-W) condition and then aging by: controlled heating to a high elevated temperature (from about 335 degrees to 450 degrees F); holding at this elevated temperature; cooling to a lower elevated temperature (from about 235 degrees to 310 degrees F); holding at this lower elevated temperature; and finally cooling to room temperature. The resulting product has exfoliation and stress corrosion resistance vastly superior to -T6X tempered products at strength levels much greater than conventional -T7X tempered products. The figure is a schematic illustration of the thermal history for prior art aging practices and aging practices in accordance with the present invention.

Abstract translation: 公开了一种用于热处理厚7000系列铝合金产品的方法，其具有极好的耐腐蚀性和强度。 本发明的方法包括在淬火（-W）条件下将7000系列铝合金加工成半成品，然后通过以下方式老化：控制加热到高的高温（从约335度至450华氏度）; 在这个高温下保持; 冷却至较低的升高温度（约235度至310华氏度）; 保持在较低的高温; 最后冷却至室温。 所得产品的剥离和抗应力腐蚀性能优于-T6X回火产品，其强度远远高于常规-T7X回火产品。 该图是根据本发明的现有技术的老化实践和老化实践的热历史的示意图。