Production process of tiny chamfering special-shaped line for precise products

A production process and special-shaped wire technology, applied in wire drawing dies and other directions, can solve the problems of large chamfer size, incomplete sharp corners, irregular shapes, etc., and achieve the effects of high plastic deformation capacity, uniform grains, and considerable economic benefits.

Inactive Publication Date: 2016-05-11
DONGGUAN KELEE STEEL WIRE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention aims at the deficiencies in the prior art, and its main purpose is to provide a production process for micro-chamfered special-shaped wires for precision products, which can effectively solve the problems of irregular shapes and sharp corners in existing special-shaped steel wires. Problems with large fill and chamfer sizes

Method used

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  • Production process of tiny chamfering special-shaped line for precise products

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Experimental program
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Effect test

Embodiment 1

[0022] (1) Material selection: Select carbon structural steel material, its chemical composition contains: 0.08% C, 0.20% Si, 0.35% Mn, 0.020% P, 0.028% S, and the rest is Fe.

[0023] (2) Spheroidizing annealing: Put the carbon structural steel material into the atmosphere protection furnace, add a protection atmosphere in the atmosphere protection furnace, raise the temperature to 20°C above the austenite transformation temperature, keep it for 4 hours, and then heat it at 10°C / Hours slowly cooled to 20°C below the austenite transformation temperature, kept for 3 hours, and then cooled with the furnace until it came out of the furnace. The protective atmosphere is methanol, and the flow rate of methanol gas is 2L / min.

[0024] (3) Cold drawing: use a wire drawing machine to draw carbon structural steel materials, select a wire drawing die, the working cone angle of the wire drawing die is 8°, the sizing length is 3 mm, and the rounded corner of the die is 0.1 mm. The princ...

Embodiment 2

[0027] (1) Material selection: Select carbon structural steel material, its chemical composition contains: 0.11% C, 0.29% Si, 0.45% Mn, 0.034% P, 0.038% S, and the rest is Fe.

[0028] (2) Spheroidizing annealing: Put the carbon structural steel material into the atmosphere protection furnace, add a protection atmosphere in the atmosphere protection furnace, raise the temperature to 30°C above the austenite transformation temperature, keep it for 6 hours, and then heat it at 10°C / Slowly cool within 1 hour to 30°C below the austenite transformation temperature, keep the temperature for 4 hours, and then cool with the furnace until it comes out of the furnace. The protective atmosphere is methanol, and the flow rate of methanol gas is 2L / min.

[0029] (3) Cold drawing: use a wire drawing machine to draw carbon structural steel materials, select a wire drawing die, the working cone angle of the wire drawing die is 8°, the sizing length is 3 mm, and the rounded corner of the die ...

Embodiment 3

[0032](1) Material selection: Select carbon structural steel material, its chemical composition contains: 0.095% C, 0.25% Si, 0.41% Mn, 0.028% P, 0.032% S, and the rest is Fe.

[0033] (2) Spheroidizing annealing: Put the carbon structural steel material into the atmosphere protection furnace, add a protection atmosphere in the atmosphere protection furnace, raise the temperature to 26°C above the austenite transformation temperature, keep it for 5 hours, and then heat it at 10°C / Hours slowly cooled to 25°C below the austenite transformation temperature, kept for 3.5 hours, and then cooled with the furnace until it came out of the furnace. The protective atmosphere is methanol, and the flow rate of methanol gas is 2L / min.

[0034] (3) Cold drawing: use a wire drawing machine to draw carbon structural steel materials, select a wire drawing die, the working cone angle of the wire drawing die is 8°, the sizing length is 3 mm, and the rounded corner of the die is 0.1 mm. The pri...

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Abstract

The invention discloses a production process for a tiny chamfering special-shaped line for precision products, comprising the following steps: (1) material selection: selecting a carbon structural steel material which contains the following chemical components in mass percent: 0.08-0.11% of C, 0.20-0.29% of Si, 0.35-0.45% of Mn, 0.020-0.034% of P, 0.028-0.038% of S and the balance of Fe; (2) spheroidizing annealing: putting the carbon structural steel material into an atmosphere protecting furnace, wherein protective atmosphere is added to the atmosphere protecting furnace, heating to the temperature of 20-30 DEG C higher than an austenite transformation temperature, preserving heat for 4-6 hours, then slowly cooling to the temperature of 20-30 DEG C lower than the austenite transformation temperature at the rate of 10 DEG C / h, preserving heat for 3-4 hours, and then cooling together with the furnace until being delivered out; and (3) carrying out cold drawing. A wire rod produced by adopting the production process has relatively high plastic deformation capability, grains of an annealed structure are uniform, no abnormal structure exists, a product angle of chamfer is less than or equal to 0.15mm, and the wire rod can meet various use requirements of clients. Various performances of the product are obviously prior to current like products on the market, and therefore, the product has excellent market prospects and can create considerable economic benefits for companies.

Description

technical field [0001] The invention relates to the technology in the field of wire material processing, in particular to a production process of micro-chamfered special-shaped wires for precision products. Background technique [0002] The special-shaped steel wire is a steel wire with a non-circular cross-section, and its cross-sectional shape is various. It is an important part of the steel wire. The special-shaped steel wire usually has the following characteristics: 1. Shape and functionality. According to different shapes and uses, special-shaped steel wires have functions such as positioning, guiding, stability, practicality, and sealing; 2. Cutting-free and material-saving. The special-shaped steel wires currently produced can usually be used directly in production without further machining, thereby saving materials and reducing costs; 3. High precision. The dimensional accuracy of special-shaped steel wire produced by modern means can reach ±0.02㎜, and those with h...

Claims

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Application Information

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IPC IPC(8): C22C38/04C22C38/02C21D1/32B21C1/02B21C3/02
CPCC22C38/04B21C1/003B21C1/02B21C3/02C21D1/32C22C38/02
Inventor 郝小龙王斯华
Owner DONGGUAN KELEE STEEL WIRE
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