A kind of preparation method of two-phase isomerism strengthened non-welded box body

A welding seam-free, manufacturing method technology, applied in manufacturing tools, heat treatment equipment, furnaces, etc., can solve the problems of low toughness, decreased corrosion resistance at the weld bead position, poor fatigue performance, etc., achieving good strength, easy industrial production, Simple to use effects

Active Publication Date: 2022-03-08
NANJING UNIV OF SCI & TECH
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  • Application Information

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Problems solved by technology

However, the welded structure inevitably forms a hot-melt joint zone at the weld, which has the disadvantages of low toughness and poor fatigue performance
In addition, welding can easily lead to the formation of carburized chromium-poor nickel-poor areas of stainless steel, resulting in a decrease in the corrosion resistance of the weld bead

Method used

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  • A kind of preparation method of two-phase isomerism strengthened non-welded box body
  • A kind of preparation method of two-phase isomerism strengthened non-welded box body
  • A kind of preparation method of two-phase isomerism strengthened non-welded box body

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Embodiment Construction

[0025] With reference to each accompanying drawing, the embodiments of the present invention will be described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention does not Limited to the following examples.

[0026] The device of the present invention includes: stamping forming device (stamping motor, upper die holder, punch fixed plate, punch, hydraulic column, positioning plate, fixed bolt, die, lower die holder, etc.), reciprocating hydraulic deformation device (hydraulic press, fixed block, upper mold, lower mold, top block, pressure head and hydraulic pump, etc.).

[0027] The present invention takes the stamped and formed non-welded box as an example, and provides detailed implementation and specific operations. The following examples involve four steps including: box stamping,...

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Abstract

The invention relates to a method for manufacturing a two-phase heterogeneous strengthened non-welded box body, comprising: box body stamping forming, stress relief annealing treatment, installation of a reciprocating hydraulic deformation device, and reciprocating hydraulic deformation. It is characterized in that: Stamping forming technology, punching stainless steel sheet to obtain the main part of the box part; annealing stress relief treatment to eliminate the residual deformation structure in the part after stamping, and the deformation stress can be restored; reciprocating hydraulic deformation, the strain induces the box in the loaded area The martensite transformation of the austenite structure in some parts, the martensite structure increases the strength of the box, and retains the austenite structure in other parts, so that the box has good toughness at the same time.

Description

technical field [0001] The invention relates to the field of manufacturing box parts, in particular to a method for preparing a two-phase isomerism strengthened non-welded box. Background technique [0002] Box parts are often used as storage containers for liquids or gases. Such parts usually need to withstand internal or external pressure, and have high requirements for safety and airtight performance. During container transportation and transfer, materials need to have a certain ability to resist external shock or vibration loads. In addition, tanks used to store water or other corrosive liquids also need to have excellent corrosion resistance. Therefore, the most widely used material for making box parts is stainless steel. However, the strength of traditional stainless steel is low, and the thickness of the steel plate usually needs to be increased to meet the force requirements, resulting in an increase in the weight of the box parts, which brings inconvenience to it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D35/00B21D22/02B21D26/02C21D9/00C21D1/30
CPCB21D35/001B21D22/02B21D26/02C21D9/0068C21D1/30
Inventor 肖礼容刘亿周浩陈雪飞魏康高波曹阳聂金凤李玉胜
Owner NANJING UNIV OF SCI & TECH
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