Production process of alloy steel material for high-strength internal hexagonal wrench

A hexagonal wrench and production process technology, applied in the field of wire processing, can solve the problems of low plastic deformation ability of products, inability to meet customer bending forming requirements, time-consuming and energy-consuming production process, etc., to improve labor productivity and shorten spheroidizing annealing. Softening time process, the effect of protecting the environment

Inactive Publication Date: 2015-04-22
DONGGUAN KELEE STEEL WIRE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 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 of alloy steel materials for high-strength inner hexagonal wrenches, whi

Method used

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  • Production process of alloy steel material for high-strength internal hexagonal wrench

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Material selection: 50CrVa material is selected as the base material.

[0032] (2) Circular drawing: the base metal is drawn multiple times by a drawing machine to obtain round wires of required specifications and sizes. The compression rate of each drawing is 10%, and the total compression rate is 40%.

[0033] (3) Spheroidizing annealing: hoist the round wire into the atmosphere protection furnace, and the atmosphere protection furnace is added with a protection atmosphere. The protection atmosphere is methanol, and the flow rate of methanol gas is 10ml / min, and then the round wire is heated to Austrian 20°C above the tenite transformation temperature, keep warm for 4 hours, then slowly cool at 10°C / hour to 20°C below the austenite transformation temperature, hold for 3 hours, then cool with the furnace until it comes out of the furnace, the austenite transformation temperature is 720°C .

[0034] (4) Pickling: Use an acid solution to remove the scale on the surf...

Embodiment 2

[0040] (1) Material selection: 50CrVa material is selected as the base material.

[0041] (2) Circular drawing: The base metal is drawn multiple times by a drawing machine to obtain round wires of the required size. The compression rate of each drawing is 15%, and the total compression rate is 44.8%.

[0042] (3) Spheroidizing annealing: hoist the round wire into the atmosphere protection furnace, and the atmosphere protection furnace is added with a protection atmosphere. The protection atmosphere is methanol, and the flow rate of methanol gas is 10ml / min, and then the round wire is heated to Austrian 25°C above the tenite transformation temperature, hold for 5 hours, then slowly cool at 10°C / hour to 25°C below the austenite transformation temperature, hold for 3.5 hours, then cool with the furnace until it comes out of the furnace, the austenite transformation temperature is 720°C .

[0043] (4) Pickling: Use an acid solution to remove the scale on the surface of the wire. ...

Embodiment 3

[0049] (1) Material selection: 50CrVa material is selected as the base material.

[0050] (2) Circular drawing: The base metal is drawn multiple times by a drawing machine to obtain round wires of required specifications and sizes. The compression rate of each drawing is 20%, and the total compression rate is 48.8%.

[0051] (3) Spheroidizing annealing: hoist the round wire into the atmosphere protection furnace, and the atmosphere protection furnace is added with a protection atmosphere. The protection atmosphere is methanol, and the flow rate of methanol gas is 10ml / min, and then the round wire is heated to Austrian 30°C above the tenite transformation temperature, keep warm for 6 hours, then slowly cool at 10°C / hour to 30°C below the austenite transformation temperature, hold for 4 hours, then cool with the furnace until it comes out of the furnace, the austenite transformation temperature is 720°C .

[0052] (4) Pickling: Use an acid solution to remove the scale on the su...

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Abstract

The invention discloses a production process of an alloy steel material for a high-strength internal hexagonal wrench. The production process comprises the following steps of 1, material selecting, wherein a material with the trade mark of 50CrVa is selected as a base material; 2, round drawing; 3, spheroidizing annealing; 4, acid pickling; 5, phosphating; 6, saponifying; 7, hexagon drawing. By selecting specific material and adopting specific matched drawing process and spheroidizing process, a wire made according to the invention has relatively high plastic deformation capability, meets the bending forming requirements of customers, is uniform in annealed structure grains, is high in rate of spheroidization and is free of abnormal structures; the product size is stable, the precision is high, the tolerance of opposite sides is +/-0.02mm, and the tolerance of opposite angles is +/-0.03mm; the material meets the use requirements of the customers, after the material is subjected to quenched-tempered heat treatment, the hardness HRC of the obtained wrench is greater than or equal to 55, the wear resistance is good, and the service life is long; meanwhile, the softening time in the spheroidizing annealing working procedure is shortened by a larger margin, and the goals of shortening the production cycle, reducing energy consumption, raising work productivity, reducing the production cost, protecting the environment and the like are achieved.

Description

technical field [0001] The invention relates to the technology in the field of wire rod processing, in particular to a production process of an alloy steel material for a high-strength hexagonal wrench. Background technique [0002] Allen wrench is also called Allen wrench, the common English names are "Allen key (or Allen wrench)" and "Hex key" (or Hex wrench). The "wrench" in the name means the action of "twisting", which embodies the most important difference between the Allen wrench and other common tools (such as: slotted screwdrivers and Phillips screwdrivers), which apply force to the screw through torque, Greatly reduces the strength of the user. It can be said that among the installation tools involved in the modern furniture industry, although the Allen wrench is not the most commonly used, it is the best. The Allen wrench can be passed down to this day and has become an indispensable part of the industrial manufacturing industry The key to a powerful tool lies i...

Claims

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Application Information

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IPC IPC(8): B21C37/04C21D8/06C21D1/32
CPCB21C37/045C21D1/32C21D8/065
Inventor 王斯华邓之强
Owner DONGGUAN KELEE STEEL WIRE
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