Forming process of hexagonal alloy tool steel s2

A hexagonal alloy and forming process technology, which is applied in the field of tool steel, can solve the problems of affecting the surface hardness of finished products, strong decarburization sensitivity, cumbersome process, etc., and achieve the effects of reducing quenching deformation, prolonging wear resistance, and stabilizing the quenching hardness

Active Publication Date: 2021-09-21
昆山正通铭金属有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing tool steel S2 has high content of carbon, silicon and manganese, which is highly sensitive to decarburization, and it is easy to produce a thick decarburization layer, or even a full decarburization layer, which will seriously affect the surface hardness of the finished product after heat treatment.
At present, the hexagonal tool steel is prepared by the following processes: annealing - pickling - phosphating - cold drawing deformation - annealing - pickling - phosphating - cold drawing forming, so multiple annealing and other processing procedures are required, and the process is very cumbersome

Method used

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  • Forming process of hexagonal alloy tool steel s2
  • Forming process of hexagonal alloy tool steel s2

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] Step 1: Sand blasting treatment: sandblasting the tool steel S2 with a raw material size of 8 mm, and the sand blasting treatment is used to remove the oxide layer on the surface of the raw material tool steel S2;

[0087] Step 2: Spheroidizing annealing treatment:

[0088] Two (a): Transport the wire rack loaded with the tool steel S2 after sandblasting to the supporting plate of the base, cover the inner cover, lock the inner cover through hydraulic clamps, and then start filling nitrogen, and load the heating cover ;

[0089] Two (a): Carry out the first stage of temperature rise in the furnace, raise the temperature in the furnace to 593°C, and keep it at 593°C for two hours, use N 2 To purge, N 2 The purging volume is: 80m 2 / h, and replace all the original gas in the furnace;

[0090] Two (c): Carry out the second stage of temperature rise in the furnace, raising the temperature in the furnace from 593°C to 775°C, with a heating rate of 88.5°C / h. During the he...

Embodiment 2

[0096] Step 1: Sand blasting treatment: sandblasting the tool steel S2 with a raw material size of 8 mm, and the sand blasting treatment is used to remove the oxide layer on the surface of the raw material tool steel S2;

[0097] Step 2: Spheroidizing annealing treatment:

[0098] Two (a): Send the tool steel S2 after the blasting treatment into the bell annealing furnace;

[0099] Two (b): Carry out the first stage of temperature rise in the furnace, raise the temperature in the furnace to 596 ° C, and keep it at 596 ° C for two hours, use N 2 To purge, N 2 The purging volume is: 75m 2 / h-85m 2 / h, and replace all the original gas in the furnace;

[0100] Two (c): Carry out the second stage of temperature rise in the furnace, raising the temperature in the furnace from 596°C to 778°C, with a heating rate of 85°C / h, during the heating process, N 2 The purge volume is 65m 2 / h, and maintained at 778°C for four hours, N 2 The purge volume is 55m 2 / h;

[0101] Two (d): ...

Embodiment 3

[0106] Step 1: Sand blasting treatment: sandblasting the tool steel S2 with a raw material size of 8 mm, and the sand blasting treatment is used to remove the oxide layer on the surface of the raw material tool steel S2;

[0107] Step 2: Spheroidizing annealing treatment:

[0108] Two (a): Send the tool steel S2 after the blasting treatment into the bell annealing furnace;

[0109] Two (b): Carry out the first stage of temperature rise in the furnace, raise the temperature in the furnace to 600°C, and keep it at 600°C for two hours, use N 2To purge, N 2 The purging volume is: 85m 2 / h, and replace all the original gas in the furnace;

[0110] Two (c): Carry out the second stage of temperature rise in the furnace, raising the temperature in the furnace from 600°C to 780°C, with a heating rate of 90°C / h. During the heating process, N 2 The purge volume is 75m 2 / h, and maintained at 780°C for four hours, during the heat preservation process, N 2 The purge volume is 65m 2 ...

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Abstract

The invention relates to a molding process of hexagonal alloy tool steel S2, the steps of which are sand blasting: the raw material tool steel S2 is subjected to sand blasting, and the sand blasting is used to remove the oxide layer on the surface of the raw material tool steel S2; spheroidizing annealing treatment: The tool steel S2 after sand blasting treatment is sent to the bell annealing furnace for spheroidizing annealing treatment. The spheroidizing annealing softens the tool steel S2 to facilitate subsequent stretching and forming; pickling and phosphating treatment: use hydrochloric acid to spheroidizing annealing The finished tool steel S2 is pickled, and then the tool steel S2 is phosphated by phosphate, so that the surface of the tool steel S2 is covered with a phosphating film, which prevents rust and has a lubricating effect; drawing forming: pickling phosphorus The melted tool steel S2 is drawn into hexagonal alloy tool steel S2. In this molding process, by optimizing the spheroidizing annealing process and the surface phosphating process, only one degradation process and phosphating process are used, thereby shortening the construction period, reducing the cost, and stabilizing the quality of the product.

Description

technical field [0001] The invention relates to tool steel, in particular to a forming process of hexagonal alloy tool steel S2. Background technique [0002] Tool steel is a type of alloy steel, and S2 is a type of tool steel, which is a high-grade steel for making tools. S2 tool steel is used as a steel material for making tools. It is used to manufacture various high-quality power tools such as hexagonal bits, hexagonal wrenches, screwdrivers and other special tools. However, the existing tool steel S2 has high content of carbon, silicon and manganese, and is highly sensitive to decarburization. It is easy to produce a thick decarburization layer, or even a full decarburization layer, which will seriously affect the surface hardness of the finished product after heat treatment. At present, the hexagonal tool steel is prepared by the following processes: annealing - pickling - phosphating - cold drawing deformation - annealing - pickling - phosphating - cold drawing formi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/20C22C38/22C22C38/24C22C38/60C21D1/32C21D1/74C23C22/73B21C1/00
CPCB21C1/003C21D1/32C21D1/74C22C38/002C22C38/02C22C38/04C22C38/20C22C38/22C22C38/24C22C38/60C23C22/73
Inventor 李柏翰
Owner 昆山正通铭金属有限公司
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