公开(公告)号：US20190118251A1

公开(公告)日：2019-04-25

申请号：US16092355

申请日：2016-04-20

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Bin HU ,  Pan WANG

IPC: B22D21/00 ,  C22F1/043 ,  C22C21/04

Abstract: Methods of casting lightweight, high-strength aluminum cast structural components are provided wherein the casting is accomplished by low-pressure die casting or gravity casting. The aluminum cast structural component is preferably composed of an aluminum-based alloy comprising silicon at ≥about 4 to ≥about 7 wt. %; iron at ≥about 0.15 wt. %; manganese at ≥about 0.5 wt. %; chromium at ≥about 0.15 to ≥about 0.5 wt. %; magnesium at ≥about 0.8 wt. %; zinc at ≥about 0.01 wt. %; titanium at ≥about 0.05 to ≥about 0.15 wt. %; phosphorus at ≥about 0.003 wt. %; strontium at ≥about 0.015 wt. % and a balance of aluminum.

公开(公告)号：US20190276919A1

公开(公告)日：2019-09-12

申请号：US16348864

申请日：2016-12-09

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Bin HU ,  Pan WANG

IPC: C22F1/043 ,  C22C21/04

Abstract: Provided is a method of heat treating a die cast aluminum alloy component. A die cast component has at least one thin walled region with a thickness of ≤5 mm. The alloy has silicon at ≥6.5 mass % to ≤15.5 mass %, copper at ≥0.1 mass % to ≤3.5 mass %, magnesium at ≤0.5 mass %, manganese at ≤0.6 mass %, and chromium at ≤0.6 mass %. The method includes quenching the die cast component at a cooling rate of ≥ about 100° C./second to a first temperature of less than 50° C. and age hardening by heating the die cast component to a second temperature of ≥ about 150° C. for a predetermined duration of time to facilitate formation of particles of Mg2Si in an aluminum alloy matrix. The aluminum alloy treated by the method can form lightweight, high strength, high ductility components.

公开(公告)号：US20200002788A1

公开(公告)日：2020-01-02

申请号：US16486397

申请日：2017-03-09

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Bin HU

IPC: C22C21/02 ,  C22F1/043

Abstract: An aluminum alloy consisting essentially of from greater than 6 wt % to about 12.5 wt % silicon; iron present in an amount up to 0.15 wt %; from about 0.1 wt % to about 0.4 wt % chromium; from about 0.1 wt % to about 3 wt % copper; from about 0.1 wt % to about 0.5 wt % magnesium; from about 0.05 wt % to about 0.1 wt % titanium; less than 0.01 wt % of strontium; and a balance of aluminum and inevitable impurities. The aluminum alloy contains no vanadium. A method for increasing ductility and strength of an aluminum alloy without using vacuum and a T7 heat treatment, the method comprising: casting the molten aluminum alloy by a high pressure die-cast process to form a cast structure. The structural castings formed of the aluminum alloy composition disclosed herein exhibit desirable mechanical properties, such as high strength and high ductility/elongation.

公开(公告)号：US20180057913A1

公开(公告)日：2018-03-01

申请号：US15557001

申请日：2015-03-19

Applicant: Bin Hu ,  GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Bin HU

IPC: C22C21/02 ,  B22D17/00

CPC classification number: C22C21/02 ,  B22D17/00 ,  C22F1/043

Abstract: An alloy composition includes from about 4 wt % to about 11 wt % of silicon based on a total wt % of the alloy composition; from about 0.1 wt % to about 0.5 wt % of chromium based on the total wt % of the alloy composition; from about 0.1 wt % to about 0.5 wt % of magnesium based on the total wt % of the alloy composition; from about 0.01 wt % to about 0.05 wt % of titanium based on the total wt % of the alloy composition; equal to or less than 0.5 wt % of iron based on the total wt % of the alloy composition; equal to or less than 0.5 wt % of manganese based on the total wt % of the alloy composition; and a balance of aluminum.