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Technology for producing fastener for aerospace

An aerospace and fastener technology, which is applied in the technological field of producing aerospace fasteners, can solve the problems of low work efficiency, difficulty and high production cost, and achieves improved work efficiency, strong oxidation resistance and corrosion resistance. strong effect

Inactive Publication Date: 2017-05-17
江苏佳杰特种螺钉有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, fasteners are usually mass-produced, and it is extremely difficult to produce fasteners with high performance requirements for the aforementioned special industries in the existing production process, and at the same time, the production cost is extremely high and the work efficiency is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A process for producing aerospace fasteners, characterized in that it comprises the steps of:

[0025] (1) Steel billet preparation: Prepare raw materials for smelting molten steel, and use the molten steel to continuously cast steel billets; the mass parts of the components of the steel billet are as follows: 0.5 parts of C, 0.3 parts of Si, 0.8 parts of Mn, 0 parts of P, and 0 parts of S 0 part, 0.1 part of Cr, 0.1 part of Ni and the rest of Fe and impurities;

[0026] (2) Billet heating: heat the billet to 900°C, and start rolling at 900°C on the high-line roughing mill;

[0027] (3) Wire rod preparation: the billets are processed into wire rods through high-speed intermediate rolling mills, pre-finishing mills, finishing mills, and reducing and sizing mills, and then spun into coils, and the spinning temperature is controlled at 650°C;

[0028] (4) Adjust the intake pressure of the pinch roller to 7bar, and the clamping force to 5bar;

[0029] (5) Wire rod and wir...

Embodiment 2

[0038] A process for producing aerospace fasteners, characterized in that it comprises the steps of:

[0039] (1) Steel billet preparation: Prepare raw materials for smelting molten steel, and use the molten steel to continuously cast steel billets; the mass parts of the components of the steel billet are as follows: 0.75 parts of C, 0.4 parts of Si, 0.9 parts of Mn, 0.025 parts of P, and 0.025 parts of S 0.025 parts, 0.3 parts of Cr, 0.15 parts of Ni and the rest of Fe and impurities;

[0040] (2) Billet heating: heat the billet to 950°C, and start rolling at 950°C on the high-line roughing mill;

[0041] (3) Wire rod preparation: the steel billet is processed into wire rod through the high-speed intermediate rolling mill, pre-finishing mill, finishing mill, and reducing sizing mill, and then spun into coils, and the spinning temperature is controlled at 675°C;

[0042] (4) Adjust the intake pressure of the pinch roller to 7.5bar, and the clamping force to 6bar;

[0043] (5...

Embodiment 3

[0052] A process for producing aerospace fasteners, characterized in that it comprises the steps of:

[0053](1) Steel billet preparation: Prepare raw materials for smelting molten steel, and use the molten steel to continuously cast steel billets; the mass parts of the components of the steel billet are as follows: 1 part of C, 0.5 part of Si, 1 part of Mn, 0.05 part of P, and 1 part of S 0.05 parts, 0.5 parts of Cr, 0.2 parts of Ni and the rest of Fe and impurities;

[0054] (2) Billet heating: the billet is heated to 1000°C, and the rolling temperature is 1000°C on the high-line roughing mill;

[0055] (3) Wire rod preparation: the billets are processed into wire rods through high-speed intermediate rolling mills, pre-finishing mills, finishing mills, and reducing sizing mills, and then spun into coils, and the spinning temperature is controlled at 700°C;

[0056] (4) Adjust the intake pressure of the pinch roller to 8bar, and the clamping force to 7bar;

[0057] (5) Wire...

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PUM

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Abstract

The invention discloses a technology for producing a fastener for aerospace. A coil rod is prepared through steel blank preparation, steel blank heating, and air inlet pressure and clamping force adjustment of a clamping roller, after cooling, a wire coil rod is obtained, through annealing, acid pickling, wire pulling, forging rolling or tapping, a formed product is formed, and finally through heat treatment and surface coating treatment, packaging is carried out. The fastener obtained through the production technology can be widely applied to special industries of the nuclear power industry, the high-speed rail transport industry, the car transport industry, the aerospace industry, the petrochemical industry and the like, the properties of high hardness, high strength, high corrosion resistance, oxidability resistance and the like are achieved, the production cost is reduced, work efficiency is improved, and batched production can be achieved.

Description

technical field [0001] The invention relates to the production of fasteners, in particular to a process for producing fasteners used in aerospace. Background technique [0002] As a common part, fasteners are usually used in various fields, but when fasteners are applied to special industries, their hardness, strength, corrosion resistance, oxidation resistance and other performance requirements are extremely high, such as nuclear power industry, high-speed rail Transportation industry, automobile transportation industry, aerospace industry, petrochemical industry, etc. In the prior art, fasteners are usually mass-produced, and it is extremely difficult to produce fasteners with high performance requirements for the aforementioned special industries in the existing production process, while the production cost is extremely high and work efficiency is low. Contents of the invention [0003] In view of the deficiencies in the prior art, the object of the present invention i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/02C22C38/40C22C38/60C21D8/00C21D9/00
CPCC22C38/04C21D8/065C21D9/0093C21D2211/009C22C38/002C22C38/02C22C38/40C22C38/60
Inventor 王长玉张卫华张冬萍范军平
Owner 江苏佳杰特种螺钉有限公司