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Hex screw and manufacturing method thereof

A hexagonal screw and external thread technology, which is applied in the direction of screws, mechanical equipment, threaded fasteners, etc., can solve the problem of easy slipping between the nut and the inner hexagonal wrench, poor wear resistance and corrosion resistance, and difficulty in turning the hexagonal screw. Convenience and other issues, to achieve the effect of speeding up the sintering reaction speed, clean and pollution-free interface, and optimizing performance

Active Publication Date: 2016-11-09
NINGBO YINZHOU HAISHENG MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current hexagonal screw, which is compatible with the hexagonal wrench, drives the screw to rotate by turning the hexagonal nut of the hexagonal screw, but the hexagonal screw on the market is easy to slip between the nut and the hexagonal wrench (metal parts The friction force between them is small), it is very inconvenient when turning the hexagonal screws, so there is a certain room for improvement
[0004] And the screws in the prior art are generally made of simple alloy steel, and the wear resistance and corrosion resistance are often poor in the long-term use process, causing larger waste

Method used

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  • Hex screw and manufacturing method thereof
  • Hex screw and manufacturing method thereof
  • Hex screw and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] a kind of like figure 1 , figure 2 The shown hexagonal screw includes a main body and a connecting bolt arranged at one end of the main body, the other end of the main body is provided with a connecting hole, the connecting bolt has an external thread structure, the connecting hole has an internal thread structure, the connecting bolt, The connection holes are arranged coaxially with the main body in its extending direction. The hexagonal screws are made of alloy steel composite material, and the alloy steel composite material includes an alloy steel matrix and a ceramic layer clad on the surface of the alloy steel matrix by laser cladding. The alloy steel matrix is ​​composed of the following components (by mass percentage): C: 0.40%, Si: 0.35%, Mn: 0.50%, Cr: 0.60%, Ni: 0.12%, Cu: 0.05%, Mo: 0.10% , Mg: 0.30%, Ti: 0.08%, W: 0.3%, V: 0.22%, RE: 0.12%, P≤0.018%, S≤0.015%, the balance is Fe and unavoidable impurity elements. The ceramic layer is SiC / Si 3 N 4 Composi...

Embodiment 2

[0034] The difference between this example and Example 1 is that the alloy steel matrix is ​​composed of the following components (by mass percentage): C: 0.35%, Si: 0.40%, Mn: 0.40%, Cr: 0.70%, Ni: 0.08%, Cu: 0.06%, Mo: 0.08%, Mg: 0.35%, Ti: 0.05%, W: 0.4%, V: 0.12%, RE: 0.16%, P≤0.018%, S≤0.015%, balance Fe and inevitable impurity elements; the ceramic layer is SiC / Si 3 N 4 Composite ceramics, SiC / Si 3 N 4 The composite ceramic includes the following components in mass percentage: 3.0% C, 26% N, 5% Cu, 5% Fe, 5% Y, and the balance is Si. Others are the same as in Example 1 and will not be repeated here.

Embodiment 3

[0036] The difference between this example and Example 1 is that the alloy steel matrix is ​​composed of the following components (by mass percentage): C: 0.45%, Si: 0.30%, Mn: 0.60%, Cr: 0.55%, Ni: 0.15%, Cu: 0.04%, Mo: 0.12%, Mg: 0.25%, Ti: 0.12%, W: 0.25%, V: 0.25%, RE: 0.08%, P≤0.018%, S≤0.015%, balance Fe and inevitable impurity elements; the ceramic layer is SiC / Si 3 N 4 Composite ceramics, SiC / Si 3 N 4 The composite ceramic includes the following components in mass percentage: 2.0% C, 27% N, 2.5% Cu, 6% Fe, 4% Y, and the balance is Si. Others are the same as in Example 1 and will not be repeated here.

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Abstract

The invention relates to a hex screw and belongs to the technical field of alloy materials. The hex screw comprises a main body and a connecting bolt arranged at one end of the main body, a connecting hole is formed in the other end of the main body, the connecting bolt is provided with an external thread structure, and the connecting hole is provided with an internal thread structure. The connecting bolt, the connecting hole and the main body are coaxial in the extending direction of the main body. The hex screw is made of an alloy steel composite which comprises an alloy steel base body and a ceramic layer arranged on the surface of the alloy steel base body in a laser cladding mode. According to the hex screw, the surface of the alloy steel base body is coated with the ceramic layer in a laser scanning mode, and the mechanical properties, such as strength, abrasion resistance and corrosion resistance, of the hex screw are further improved.

Description

technical field [0001] The invention relates to a hexagonal screw and a preparation method thereof, belonging to the technical field of alloy materials. Background technique [0002] The hexagon screw is a commonly used hardware accessory, which is used to connect two components together by screwing. [0003] The current hexagonal screw, which is compatible with the hexagonal wrench, drives the screw to rotate by turning the hexagonal nut of the hexagonal screw, but the hexagonal screw on the market is easy to slip between the nut and the hexagonal wrench (metal parts The friction between them is small), and it is very inconvenient when turning the hexagonal screws, so there is a certain room for improvement. [0004] And the screws in the prior art are generally made of simple alloy steel, and the wear resistance and corrosion resistance are often poor during long-term use, causing larger waste. Contents of the invention [0005] The object of the present invention is t...

Claims

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Application Information

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IPC IPC(8): F16B35/04C22C38/02C22C38/04C22C38/18C22C38/08C22C38/16C22C38/12C22C38/14C22C29/00C23C24/10
CPCC22C29/00C22C38/002C22C38/005C22C38/02C22C38/04C22C38/08C22C38/12C22C38/14C22C38/16C22C38/18C23C24/103F16B35/041
Inventor 李建忠
Owner NINGBO YINZHOU HAISHENG MACHINERY
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