Heat treatment technology of lock case mold base

A technology of locking shell mold base and process, applied in heat treatment baths, heat treatment furnaces, heat treatment equipment and other directions, can solve the problems of uneven hardness of upper and lower mold surfaces, quenching failures, etc., to reduce quenching soft spots, ensure quenching effect, and use effect. Good results

Inactive Publication Date: 2019-01-04
JIANGSU LEAP MACHINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a heat treatment process for the lock case formwork to solve the problem that the hardness of the upper and lower mold surfaces is prone to be uneven after the heat treatment and quenching of the lock case formwork, which leads to the problem of quenching failure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A heat treatment process for a shell-locking mold base, wherein the outer contour of the shell-locking mold base is a rectangular block structure, and the heat treatment process includes heating and heat preservation, annealing, quenching, and tempering. Wash, polish, repair damage, and dry it for later use.

[0016] Wherein the heating and heat preservation treatment is carried out in the mixed solution of sodium hydroxide, bamboo charcoal and nitrous acid whose mass ratio is 1:1:1, and the heating temperature is 1450 ° C; , the quenching medium used for quenching is brine with a concentration of 10% and a temperature of 60 °C, the quenching heat treatment process parameters are 1100 °C for 0.8h, oil cooling; Oil cooling; after complete tempering, put the mold base into ionized water for cooling, and the ionized water is a mixture of water, zinc, titanium, magnesium and nickel, and the And the molar mass ratio of nickel element is 1:0.01:0.01:0.01:0.01, and then it is...

Embodiment 2

[0019] A heat treatment process for a shell-locking mold base, wherein the outer contour of the shell-locking mold base is a rectangular block structure, and the heat treatment process includes heating and heat preservation, annealing, quenching, and tempering. Wash, polish, repair damage, and dry it for later use.

[0020] Wherein the heating and heat preservation treatment is carried out in the mixed solution of sodium hydroxide, bamboo charcoal and nitrous acid whose mass ratio is 1:1:1, and the heating temperature is 1400 ° C; , the quenching medium used for quenching is brine with a concentration of 9% and a temperature of 80 ° C, the quenching heat treatment process parameters are 1000 ° C for 1 h, oil cooling; Oil cooling; after complete tempering, put the mold base into ionized water for cooling, and the ionized water is a mixture of water, zinc, titanium, magnesium and nickel, and the And the molar mass ratio of nickel element is 1: 0.01: 0.01: 0.01: 0.01, and then i...

Embodiment 3

[0022] A heat treatment process for a shell-locking mold base, wherein the outer contour of the shell-locking mold base is a rectangular block structure, and the heat treatment process includes heating and heat preservation, annealing, quenching, and tempering. Wash, polish, repair damage, and dry it for later use.

[0023] Wherein the heating and heat preservation treatment is carried out in the mixed solution of sodium hydroxide, bamboo charcoal and nitrous acid whose mass ratio is 1:1:1, and the heating temperature is 1500 ° C; , The quenching medium used for quenching is salt water with a concentration of 8%-12% and a temperature of 50 ° C. The quenching heat treatment process parameters are 1200 ° C for 0.5 h, oil cooling; then tempering, and the tempering heat treatment process parameters are at 550 ° C. Heat preservation for 1.5h, oil cooling; after complete tempering, put the mold base into ionized water for cooling, the ionized water is a mixture of moisture, zinc, ti...

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PUM

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Abstract

The invention discloses a heat treatment technology of a lock case mold base. The outer contour of the lock case mold base is of a cuboid structure, the heat treatment process of the lock case mold base comprises steps of heating insulation, annealing, quenching and tempering, the heating insulation treatment is performed in a mixed solution of sodium hydroxide, bamboo charcoal and nitrous acid, heating temperature is 1400-1500 DEG C, a quenching medium adopted for quenching after the heating insulation is saline water with concentration being 8%-12% and temperature being 50-80 DEG , the moldbase after tempering is completed is put in deionized water for cooling, and then the mold base is taken out and air-cooled to the room temperature. The saline water with concentration being 8%-12% isadopted as the quenching medium, bubbles produced when the mold base enters the quenching medium can be broken quickly, so that quenching soft spots are reduced, consistency of cooling speeds of upper and low mold surfaces is guaranteed, and consistency of hardness of the upper and lower mold surfaces is guaranteed; meanwhile, the lock case mold base is placed in the quenching medium at an inclined angle larger than 45 degrees, the bubbles can be further broken and flow away, therefore, the quenching effect is ensured, and hardness of the upper and lower mold surfaces is in the hardness range.

Description

technical field [0001] The invention relates to the application field of hot forging, in particular to a heat treatment process for a shell-locking die set. Background technique [0002] The lock shell matched with the lock bolt is usually a casting, and later changed to a forging due to customer needs, while the lock shell die set is a special die set for the lock shell forging. Surface hardness is not uniform, resulting in quenching failure. And due to the complex structure and uneven wall thickness, there are thermal stress and tissue stress during heat treatment. This internal stress can be superimposed or partially canceled, which is complex and changeable, because it can change with the heating temperature and heating speed. , cooling method, cooling rate, mold shape and size change, so deformation or cracks tend to occur during heat treatment. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a heat treatment process for the shel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/18C21D1/26C21D1/46C21D1/60C21D9/00
CPCC21D1/18C21D1/26C21D1/46C21D1/60C21D9/0068
Inventor 蒋波何天成
Owner JIANGSU LEAP MACHINE
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