Hot-rolled wire rod for manufacturing high-strength container self-tapping screw and production method of hot-rolled wire rod

A hot-rolled wire rod and self-tapping screw technology, which is applied in the direction of manufacturing tools, rolling mill control devices, metal rolling, etc., can solve problems that do not involve the production method of high-strength container self-tapping screws

Active Publication Date: 2014-12-24
MAGANG (GROUP) HOLDING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

None of the above invention patents involves or solves the production method of hot-rolled wire rod for manufacturing high-strength container self-tapping screws

Method used

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  • Hot-rolled wire rod for manufacturing high-strength container self-tapping screw and production method of hot-rolled wire rod
  • Hot-rolled wire rod for manufacturing high-strength container self-tapping screw and production method of hot-rolled wire rod
  • Hot-rolled wire rod for manufacturing high-strength container self-tapping screw and production method of hot-rolled wire rod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] It is used to manufacture hot-rolled wire rods for high-strength container self-tapping screws. Its chemical composition consists of the following substances by weight percentage (%): C: 0.28%, Mn: 0.86%, Si: 0.06%, P: 0.02%, S : 0.011%, Cr: 0.51%, and the rest are Fe, which are listed in Table 1; the diameter φ8.0mm hot-rolled wire rod produced by the production method of the present invention, the wire rod tensile strength, elongation, and area reduction are listed in Table 2 Among them, 1 / 3 cold heading is qualified, and it has good cleaning performance, which meets the production requirements of high-strength self-tapping screws.

[0079] 1. Smelting

[0080] Using converter or electric furnace for smelting, tapping endpoint control: [C]0.06~0.10%, [P]≤0.015%, [S]≤0.018%. Tapping temperature: 1640-1690°C; implement double slag blocking process: add slag blocking plug before tapping, and add slag blocking rod or slag blocking cone when tapping 4 / 5; alloy and recarbu...

Embodiment 2

[0125] With the method of Example 1, the chemical composition is listed in Table 1, the properties are listed in Table 2, and the rolling process parameters are listed in Tables 3-22 respectively.

Embodiment 3

[0127] With the method of Example 1, the chemical composition is listed in Table 1, the properties are listed in Table 2, and the rolling process parameters are listed in Tables 3-22 respectively.

[0128] Schedule:

[0129] Table 1 Chemical composition (%) table of the embodiment of the present invention

[0130] Example

C

Si

mn

P

S

Cr

Fe

1

0.28

0.06

0.86

0.020

0.011

0.51

margin

2

0.29

0.06

0.88

0.017

0.010

0.54

margin

3

0.27

0.07

0.90

0.019

0.010

0.57

margin

[0131] Table 2 performance table of the embodiment of the present invention

[0132]

[0133]

[0134] Table 3 Roll Diameter (mm) of Roughing Mill

[0135] Example

CF1

CF2

CF3

CF4

CF5

CF6

1

548

548

548

467

467

467

2

548

548

548

467

467

467

3

536

536

536...

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Abstract

The invention discloses a hot-rolled wire rod for manufacturing a high-strength container self-tapping screw and a production method of the hot-rolled wire rod, belonging to the hot-rolled wire rods. The hot-rolled wire rod consists of chemical components including the following substances in percentage by weight: 0.26-0.30% of C, 0.80-1.0% of Mn, less than or equal to 0.08% of Si, less than or equal to 0.025% of P, less than or equal to 0.015% of S, 0.45-0.65% of Cr and the balance of Fe. According to the phi8.0mm hot-rolled wire rod produced by using the production method disclosed by the invention, the tensile strength of the wire rod is more than or equal to 590Mpa, the percentage of elongation is more than or equal to 25%, the area reduction rate is more than or equal to 50%, and 1 / 3 of cold upsetting is qualified. The hot-rolled wire rod has the advantages that the hot-rolled wire rod is reasonable in process equipment and parameter configuration, the longstanding problems can be solved, the product quality can be significantly improved, and the drawing processing and cold upsetting properties of the wire rod can be improved; and the hot-rolled wire rod is excellent in comprehensive performance, and can completely meet the requirements of large-scale containers.

Description

technical field [0001] The invention belongs to hot-rolled wire rods, in particular to a hot-rolled wire rod for manufacturing high-strength container self-tapping screws and a production method thereof. Background technique [0002] At present, the production of self-tapping screws for containers is usually made of SWRCH22A, φ8mm hot-rolled wire rods, which are processed by pickling, scaling, drawing, cold heading, thread rolling, and heat treatment. The tensile strength of SWRCH22A hot-rolled wire rod is usually 490-530Mpa. With the development of large-scale container production, the self-tapping screws for containers are required to increase the strength. At present, the use of SWRCH22A hot-rolled wire rod can no longer meet the requirements, and there is an urgent need Solve the production method of hot-rolled wire rods for manufacturing high-strength container self-tapping screws, produce hot-rolled wire rods for manufacturing high-strength container self-tapping screw...

Claims

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Application Information

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IPC IPC(8): C22C38/60C22C38/18C22C33/04C21D8/00C21D11/00B21B37/00
Inventor 宋强孙维于同仁许玉山王步更华刚程鼎汤寅波孙山
Owner MAGANG (GROUP) HOLDING CO LTD
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