Zinc coated steel with reduced liquid metal bristing (LME) sensitivity
A liquid metal, sensitive technology, applied in the direction of metal material coating process, solid diffusion coating, gaseous chemical plating, etc., can solve the problems of limited manufacturing methods
Pending Publication Date: 2022-07-01
GM GLOBAL TECH OPERATIONS LLC
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
However, the fabrication method of zinc-coated AHSS is limited because AHSS may undergo liquid metal embrittlement (LME) when exposed to liquid zinc.
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0068] refer to Image 6 , a pre-oxidized steel substrate 610 according to various aspects of the present disclosure is provided. Scale bar 612 is 1 μm. The pre-oxidized steel substrate 610 includes a steel substrate 614 having about 2 wt% chromium and about 1.5 wt% silicon. The pre-oxidized steel substrate 610 also includes an oxide layer 618 having a thickness 622 that varies in the range of 0.2-0.6 μm.
Embodiment 2
[0070] refer to Figure 7 , a pre-oxidized steel substrate 710 is provided in accordance with various aspects of the present disclosure. Scale bar 712 is 2.5 μm. Pre-oxidized steel substrate 710 includes steel substrate 714 and oxide layer 718 . Oxide layer 718 contains chromium, silicon, oxygen and iron.
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Abstract
The invention relates to a zinc coated steel with reduced liquid metal embrittlement (LME) sensitivity. A method of manufacturing zinc coated steel having reduced liquid metal embrittlement (LME) sensitivity in accordance with various aspects of the present disclosure includes providing a steel substrate comprising iron, carbon in an amount of about 0.01-0.45 wt%, chromium in an amount of about 0.5-5 wt%, and silicon in an amount of about 0.5-2.5 wt%. The method includes forming an oxide-containing layer on a surface of a steel substrate by annealing the steel substrate in an oxygen-containing atmosphere. The method further includes applying a zinc layer on the oxide-containing layer by a spray process. In certain aspects, the disclosure also provides a method of forming an assembly having reduced LME sensitivity via resistance spot welding. In various aspects, the disclosure also provides a zinc coated steel component comprising a steel substrate, an oxide-containing layer, and a zinc layer.
Description
technical field [0001] The present application relates to zinc-coated steels with reduced liquid metal embrittlement (LME) susceptibility and methods of making the same. Background technique [0002] This section provides background information related to the present disclosure which is not necessarily prior art. [0003] The present disclosure relates to zinc-coated steels with reduced Liquid Metal Embrittlement (LME) susceptibility, methods of making zinc-coated steels with reduced LME susceptibility, and methods of making high-strength corrosion-resistant assemblies . [0004] Advanced high strength steels (AHSS) can be used to form automotive parts or assemblies due to their high strength and high ductility. AHSS can be coated with zinc to reduce corrosion. However, the fabrication method of zinc-coated AHSS is limited because the AHSS may suffer from liquid metal embrittlement (LME) when exposed to liquid zinc. SUMMARY OF THE INVENTION [0005] This section provid...
Claims
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IPC IPC(8): C21D1/26C23C8/14C23C14/16C23C16/06C23C4/08C25D3/22C22C38/02C22C38/04C22C38/34C22C38/38C22C38/20C22C38/42C22C38/58C22C38/06C22C38/22C22C38/24C22C38/26C22C38/32C22C38/28C22C38/44C22C38/46C22C38/48C22C38/50C22C38/54
CPCC21D1/26C23C8/14C23C14/16C23C16/06C23C4/08C25D3/22C22C38/02C22C38/04C22C38/34C22C38/38C22C38/20C22C38/42C22C38/58C22C38/06C22C38/22C22C38/24C22C38/26C22C38/32C22C38/28C22C38/44C22C38/46C22C38/48C22C38/50C22C38/54C22C38/18C23C14/024B32B15/013C23C28/345C23C28/3225
Inventor 卢琦王建锋
Owner GM GLOBAL TECH OPERATIONS LLC