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公开(公告)号：US20190177818A1
公开(公告)日：2019-06-13
申请号：US16302122
申请日：2016-06-10
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Abstract: An aluminum-magnesium alloy is disclosed which provides superior properties for casting in steel dies and good ductility for forming castings of complex shapes, including thin-wall portions. The aluminum-based alloy contains, in weight percent, about 2-15 percent magnesium, 0.2 to 3 percent silicon, 0.05 to 0.5 percent chromium, 0.05 to 0.5 percent manganese, 0.05 to 0.2% titanium, and a minimal content of iron. In its molten state this aluminum-magnesium-chromium alloy can be pushed into the molding cavities of iron-based dies in a high pressure die casting procedure and conform to complexly-shaped die surfaces with thin cavity portions without dissolving appreciable amounts of iron or experiencing die soldering on the die surfaces. The resulting castings display good strength and ductility and can be further enhanced by an artificial aging process after solution heat treatment.
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公开(公告)号：US20190024226A1
公开(公告)日：2019-01-24
申请号：US16070699
申请日：2016-01-22
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Abstract: A method of manufacturing a pin (46) for a o mold (28) includes forming the pin (46) to include a substantially uniform initial hardness throughout the entire structure of the formed pin (46). The formed pin (46) is then processed with a hardening process, such that the processed pin(46) exhibits a hardness defining a hardness gradient that gradually increases from the initial hardness at a central interior region (56) of the pin (46) to an increased surface hardness at an exterior surface (60) of the pin (46). After processing the pin (46) with the hardening process, a coating (64) maybe deposited onto the exterior surface (60) of the pin (46) with a physical vapor deposition process. The coating (64) exhibits a hardness that is greater than the hardness of the increased surface hardness of the exterior surface (60) of the pin (46). The pin (46) may include, for example, a core pin, a squeeze pin, or an ejector pin.
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3.发明申请公开(公告)号：US20200325558A1
公开(公告)日：2020-10-15
申请号：US16426811
申请日：2019-05-30
Applicant: GM Global Technology Operations LLC
Abstract: An aluminum alloy having about 0.03 wt % to about 0.50 wt % Niobium (Nb); about 0.03 wt % to about 0.50% Vanadium (V); about 0.03 wt % to about 0.50% Titanium (Ti), greater than 0 wt % to about 0.50 wt % Boron (B); and the balance is Aluminum (Al) and impurities. The alloy includes a weight percent ratio of (Nb+V)/Ti from about 1 to about 5, preferably from about 2 to about 3. The alloy may include a weight percent ratio (Nb+V+Ti)/B from about 1 to about 15, preferably from about 5 to about 10. The aluminum alloy may be form by incorporating 1 part master alloy, grain refiner, having about 1.5 wt % to about 4.0 wt % Niobium (Nb); from about 0.5 wt % to about 2.0% Titanium (Ti), and from about 0.2 wt % to about 0.8 wt % Boron (B) to about 27 to 80 part conventional aluminum alloy, by weight.
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公开(公告)号：US20180127859A1
公开(公告)日：2018-05-10
申请号：US15346699
申请日：2016-11-08
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Abstract: In an example of a method for increasing strength of an aluminum alloy, the aluminum alloy is formed in a molten state. The aluminum alloy includes from about 4 wt % to about 11 wt % silicon, from greater than 0.2 wt % to about 0.5 wt % chromium, from about 0.1 wt % to about 0.5 wt % magnesium, from about 0.01 wt % to about 0.1 wt % titanium, equal to or less than about 0.5 wt % iron, equal to or less than about 0.5 wt % manganese, and a balance of aluminum. The aluminum alloy is subjected to a solution heat treatment. The aluminum alloy is quenched, and the aluminum alloy is age hardened at an age hardening temperature ranging from about 140° C. to 175° C. for a time period ranging from about 3 hours to about 35 hours.
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