Hot working process for lowering hydrogen embrittlement
A process method and thermal processing technology, applied in the direction of metal material coating process, liquid chemical plating, coating, etc., can solve the problems of material toughness reduction, decarburization, easy oxidation, etc., and reduce the possibility of hydrogen embrittlement. Effect
Active Publication Date: 2012-10-03
HANGZHOU BRANCH ZHEJIANG GEELY AUTOMOBILE RES INST +2
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Problems solved by technology
Most of the key parts of automobiles are made of high-strength steel. The selection of high-strength steel reduces the weight of the car, but the increase in strength reduces the toughness of the material, and it is more sensitive to problems such as gaps, hydrogen embrittlement, and stress corrosion.
[0003] At present, the heat treatment process of high-strength steel is carried out in ordinary box furnaces, and the surface is easily oxidized and decarburized
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[0018] In order to further explain the technical means and effects that the present invention adopts to achieve the intended purpose of the invention, below in conjunction with the accompanying drawings and preferred embodiments, the specific implementation, structure, Features and their functions are described in detail below.
[0019] The key point and the protection point of the present invention are new technological methods of vacuum heat treatment purification, electroless nickel plating and post-plating vacuum heat treatment.
[0020] figure 1 Shown is the flow chart of the thermal processing method for reducing hydrogen embrittlement of the present invention. Such as figure 1 Shown, the thermal processing method that reduces hydrogen embrittlement of the present invention comprises the steps:
[0021] Cleaning with absolute ethanol, dissolve the organic impurities on the surface of the parts in absolute ethanol, and wash away the organic impurities on the surface of...
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The invention relates to a hot working process for lowering hydrogen embrittlement, which comprises the steps of cleaning with absolute alcohol, oven-drying at 100 DEG C, vacuum heat treatment purification, ultrasonic cleaning with multipurpose concentrate, cleaning with hot water, cleaning with tap water for three times, ultrasonic wave activation with sodium chloride aqueous solution, cleaning with pure water for three times, chemical nickel-plating, cleaning with tap water for three times, spin-drying, oven-drying, vacuum heat treatment after plating, and solidification by solid lubricant dip coating. During the hot working process of the invention, vacuum heat treatment purification, solvent degreasing, neutral salt activation, chemical nickel-plating and vacuum heat treatment after plating are used, so that the traditional processes easily causing hydrogen evolution such as degreasing with strong alkaline, cleaning with strong acid, electrochemical plating are completely avoided, thereby reducing the possibility of hydrogen embrittlement.
Description
technical field [0001] The invention relates to a thermal processing technology, in particular to a thermal processing method for reducing hydrogen embrittlement. Background technique [0002] Hydrogen embrittlement is a phenomenon in which metal damage occurs due to the infiltration of hydrogen into the interior of the metal, so that the metal material undergoes delayed fracture under the action of a static stress lower than the yield strength of the material. Most of the key parts of automobiles are made of high-strength steel. The selection of high-strength steel reduces the weight of the car, but the increase in strength reduces the toughness of the material, and it is more sensitive to problems such as gaps, hydrogen embrittlement, and stress corrosion. [0003] At present, the heat treatment process of high-strength steel is carried out in ordinary box furnaces, and the surface is easily oxidized and decarburized. If the grease on the surface cannot be completely clea...
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Login to View More IPC IPC(8): C23F17/00C23C18/36C21D1/773C21D1/68
Inventor 黄艳灵吴建波高朝乾刘强杨安志赵福全
Owner HANGZHOU BRANCH ZHEJIANG GEELY AUTOMOBILE RES INST