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A method to improve the Singer effect of non-quenched and tempered bolt ladle

A non-quenched and tempered, bolt steel technology, applied in the field of deep processing of long products, can solve the problems of large mold loss, easy bolt cracking, high cold deformation strength, reduce deformation strength, solve large mold loss, and solve the problem of easy cracking of heading heads. Effect

Active Publication Date: 2021-05-25
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the deficiencies of the above-mentioned prior art, the present invention provides a method for improving the Singer effect of the non-quenched and tempered bolt ladle to solve the problem of large die loss and Bolts are easy to crack, etc.

Method used

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  • A method to improve the Singer effect of non-quenched and tempered bolt ladle
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  • A method to improve the Singer effect of non-quenched and tempered bolt ladle

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[0027] The present invention will be described in detail below in conjunction with specific embodiments and examples, and the advantages and various effects of the present invention will be presented more clearly. Those skilled in the art should understand that these specific implementations and examples are used to illustrate the present invention, not to limit the present invention.

[0028] Throughout the specification, unless otherwise specified, terms used herein should be understood as commonly used in the art. Therefore, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, this specification shall take precedence.

[0029] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present invention can be purchased from the market or prepared by existing methods.

[0030] The ...

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Abstract

The invention discloses a method for improving the Singer effect of a non-quenched and tempered bolt ladle. The method includes: performing cold drawing pre-deformation on the hot-rolled bolt steel; the amount of cold-drawing pre-deformation is γ 1 ; The steel wire after the cold drawing is carried out heading; The deformation of the heading is γ 2 ; the gamma 1 with gamma 2 Satisfy the relational expression: where δ is the volume percentage of MA components in the metallographic structure of the bolt steel. Adopting a method for improving the Singer effect of the non-quenched and tempered bolt steel ladle provided by the present invention can maximize the Bauschinger effect of the bolt steel, reduce the deformation strength of the heading head after cold drawing of the material, and solve the mold loss in the heading process Big and easy to crack the heading head.

Description

technical field [0001] The invention belongs to the technical field of long material deep processing, and in particular relates to a method for improving the Singer effect of a non-quenched and tempered bolt ladle. Background technique [0002] The fastener industry traditionally produces 800Mpa and above high-strength bolts, all of which are quenched and tempered by medium carbon steel or alloy steel to obtain high strength, but this traditional quenching and tempering process pollutes the environment, high cost, surface decarburization and deformation And other issues. Using cold-strengthened non-quenched and tempered steel to manufacture high-strength bolts can save the annealing heat treatment before cold drawing of the steel and the quenching and tempering treatment after bolt forming, which reduces production costs, simplifies the production process, shortens the production cycle, and reduces energy consumption. Consumption; at the same time, it also avoids surface ox...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/18C22C38/38C22C38/06C22C38/26C22C38/24C21D8/06
CPCC21D8/065C22C38/02C22C38/04C22C38/06C22C38/18C22C38/24C22C38/26C22C38/38
Inventor 罗志俊李舒笳孙齐松王晓晨徐士新马跃吕迺冰周洁佟倩
Owner SHOUGANG CORPORATION
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