Process for Improving Hydrogen-Induced Delayed Fracture Resistance of Medium Manganese Steel
A process method and delayed fracture technology, applied in the field of medium manganese steel preparation technology, can solve the problems of hydrogen-induced delayed fracture, large deformation resistance, limited application scope and industrialization process, etc., to reduce the sensitivity of hydrogen embrittlement and improve the resistance to delayed fracture. performance effect
Active Publication Date: 2021-10-22
BEIJING JIAOTONG UNIV
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Problems solved by technology
In recent years, although the production and manufacturing technology of medium manganese steel has been greatly developed, it is still necessary to solve the problems faced by the manufacturing technology such as springback, high deformation resistance, and easy cracking due to the increase in strength if it is to be widely used in automobile manufacturing. A series of problems, especially the hydrogen-induced delayed fracture problem caused by high-strength materials
However, there are very few researches on the hydrogen-induced delayed fracture behavior of medium manganese steel. The limited research focuses on the mechanism of austenite content and stability on the hydrogen embrittlement performance, and has not proposed an ideal method to improve the hydrogen embrittlement of medium manganese steel. The process route of hydrogen-induced delayed fracture resistance greatly limits its application range and industrialization process
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[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0025] Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components, and / or groups thereof. It will be unders...
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The invention provides a process method for improving the hydrogen-induced delayed fracture resistance of medium manganese steel. The method includes: step S110: forging medium manganese steel smelting ingots to obtain hot forged medium manganese steel; step S120: hot rolling the hot forged medium manganese steel to obtain hot rolled medium manganese steel; step S130 : performing two-phase zone annealing on the hot-rolled medium-manganese steel to obtain the annealed medium-manganese steel; Step S140: performing warm rolling on the hot-rolled medium-manganese steel and the annealed medium-manganese steel to obtain Warm rolled medium manganese steel. Compared with the existing medium manganese steel preparation process (hot rolling or cold rolling), the process treatment method of the medium manganese steel applied in the embodiment of the present invention can reduce the hydrogen embrittlement susceptibility of the medium manganese steel by more than 50%, thereby significantly Improve the delayed fracture resistance of medium manganese steel.
Description
technical field [0001] The invention relates to the technical field of medium manganese steel preparation technology, in particular to a process method for improving the hydrogen-induced delayed fracture resistance of medium manganese steel. Background technique [0002] Based on the demand for lightweight and improved crash safety, the automotive industry has put forward higher and higher requirements for the performance of automotive steel, which has greatly promoted the development of automotive steel. A large number of practices have shown that the application of advanced high-strength steel is an effective method to reduce the weight of the car body while improving the crash safety. However, with the increase of the strength level of automotive steel, especially when the strength level is increased to more than 1000 MPa, the problem of hydrogen embrittlement or hydrogen-induced delayed fracture will be faced in the actual service process, which seriously limits the appl...
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IPC IPC(8): C21D1/26C21D8/00C22C38/02C22C38/04C22C38/06
CPCC21D1/26C21D8/005C21D2211/001C21D2211/005C22C38/002C22C38/02C22C38/04C22C38/06
Inventor 张永健惠卫军赵晓丽王娇娇
Owner BEIJING JIAOTONG UNIV