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Machining technology of high-strength die steel

A processing technology and die steel technology, applied in the field of die steel processing, can solve problems such as short service life, achieve stable service life, eliminate residual compressive stress, and improve service life.

Inactive Publication Date: 2021-05-28
ANHUI HUANGSHAN HENGJIU CHAIN TRANSMISSION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the service life of the die steel, especially the die steel on the loader is relatively short. In order to prolong its service life, only by eliminating its residual compressive stress and improving its impact strength can the service life on the loader be effectively extended. Service life of die steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A processing technology for high-strength die steel, specifically as follows:

[0020] (1) pickling

[0021] Place the mold steel billet in the pickling solution and vibrate for 40 minutes at 60 degrees Celsius for pickling, with an oscillation frequency of 50 Hz; the pickling solution consists of 5 parts by mass of nitric acid, 1 part of hydrofluoric acid, citric acid 15 parts were mixed and prepared;

[0022] (2) heat treatment

[0023] Heat the steel billet after pickling to 450 degrees Celsius at a heating rate of 50 degrees Celsius / hour in a vacuum furnace, and keep it warm for 60-80 minutes; 120 minutes, and finally use an oil quenching solution with a temperature of 120 degrees Celsius to cool the billet to a temperature of 150-200 degrees Celsius, and then it can be taken out of the furnace and cooled to room temperature;

[0024] (3) Machining can be done after tempering treatment.

[0025] Further, the preparation method of described citric acid is specifi...

Embodiment 2

[0032] A processing technology for high-strength die steel, specifically as follows:

[0033] (1) pickling

[0034] Place the mold steel billet in the pickling solution and vibrate and pickle it at 65 degrees Celsius for 60 minutes, the oscillation frequency is 60Hz; the pickling solution consists of 8 parts by mass of nitric acid, 3 parts of hydrofluoric acid, citric acid Prepared after 20 parts were mixed;

[0035] (2) heat treatment

[0036] Heat the steel billet after pickling to 450 degrees Celsius at a heating rate of 50 degrees Celsius / hour in a vacuum furnace, and keep it warm for 60-80 minutes; 120 minutes, and finally use an oil quenching solution with a temperature of 120 degrees Celsius to cool the billet to a temperature of 150-200 degrees Celsius, and then it can be taken out of the furnace and cooled to room temperature;

[0037] (3) Machining can be done after tempering treatment.

[0038] Further, the preparation method of described citric acid is specific...

Embodiment 3

[0045] A processing technology for high-strength die steel, specifically as follows:

[0046] (1) pickling

[0047] Place the mold steel billet in the pickling solution and vibrate and pickle it at 62 degrees Celsius for 50 minutes, the oscillation frequency is 55Hz; the pickling solution is composed of 6 parts of nitric acid, 2 parts of hydrofluoric acid, citric acid 18 parts were mixed and prepared;

[0048] (2) heat treatment

[0049] In a vacuum furnace, heat the steel billet after pickling to 450 degrees Celsius at a heating rate of 50 degrees Celsius / hour and keep it warm for 60-80 minutes; 120 minutes, and finally use an oil quenching solution with a temperature of 120 degrees Celsius to cool the billet to a temperature of 150-200 degrees Celsius, and then it can be taken out of the furnace and cooled to room temperature;

[0050] (3) Machining can be done after tempering treatment.

[0051] Further, the preparation method of described citric acid is specifically as...

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Abstract

The invention relates to the technical field of die steel machining, in particular to a machining technology of a high-strength die steel. The machining technology specifically comprises the following steps of (1) pickling, placing a die steel blank in a pickling solution, and carrying out oscillation pickling at 60-65 DEG C for 40-60 minutes at the oscillation frequency of 50-60 Hz; (2) heat treatment, heating the acid-washed steel blank to 450 DEG C at a heating rate of 50 DEG C per hour in a vacuum furnace, and keeping the temperature for 60 -80 minutes; then continuously heating the steel blank to 1000 DEG C at a heating rate of 80 DEG C per hour, keeping the temperature for 90-120 minutes, and finally cooling the steel blank to the temperature of 150-200 DEG C by using an oil quenching liquid with the temperature of 120 DEG C, and then discharging the steel blank to room temperature; and (3) machining after tempering treatment. According to the machining technology of the high-strength die steel, the die steel machined by the machining technology has the advantages that the impact strength is greatly improved, the service life of the application on the loader is prolonged by 50% or above, the market competitiveness of the product is greatly improved, and the effect is remarkable.

Description

technical field [0001] The invention relates to the technical field of die steel processing, in particular to a processing technology of high-strength die steel. Background technique [0002] Strength refers to one of the mechanical properties that represent the resistance of engineering materials to fracture and excessive deformation. Commonly used strength performance indicators are tensile strength and yield strength (or yield point). Cast iron and inorganic materials have no yield phenomenon, so only tensile strength is used to measure their strength properties. When subjected to bending load, compressive load or torsional load, the strength performance of the material should be expressed by the bending strength, compressive strength and shear strength of the material. [0003] In the prior art, the service life of the die steel, especially the die steel on the loader is relatively short. In order to prolong its service life, only by eliminating its residual compressiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/08C21D1/18C21D1/58C21D1/773
CPCC23G1/088C21D1/18C21D1/58C21D1/773
Inventor 邵坚张林周成双王州陈炀程腾飞谢勇邵名元
Owner ANHUI HUANGSHAN HENGJIU CHAIN TRANSMISSION CO LTD
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