Invention Application
- Patent Title: HIGH-STRENGTH BAINITIC STEEL
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Application No.: US15824704Application Date: 2017-11-28
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Publication No.: US20190161838A1Publication Date: 2019-05-30
- Inventor: Jianghuai Yang , Qigui Wang , Daniel J Wilson , James D Cremonesi
- Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Main IPC: C22C38/60
- IPC: C22C38/60 ; C22C38/58 ; C22C38/54 ; C22C38/50 ; C22C38/48 ; C22C38/46 ; C22C38/44 ; C22C38/06 ; C22C38/02 ; C21D1/20

Abstract:
A high-strength steel alloy and automotive components produced therefrom, as well as a method for forming a steel alloy, are provided. The high-strength steel alloy includes iron, about 0.24 to about 0.80 weight percent carbon, about 0.40 to about 2.10 weight percent manganese, about 0.20 to about 1.60 weight percent silicon, about 0.05 to about 0.14 weight percent sulfur; about 0.10 to about 12.0 weight percent chromium, about 0.10 to about 2.50 weight percent nickel, and about 0.02 to about 0.07 weight percent aluminum. The steel alloy may also include boron, molybdenum, titanium, niobium, and/or nitrogen. The method includes air quenching a steel alloy component after mold shakeout until the component reaches a temperature in the range of 420 to 530 degrees Celsius.
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