Vacuum heat treatment surface modification technology

A technology of vacuum heat treatment and surface modification, applied in the field of heat treatment, can solve the problems of low wear resistance and corrosion resistance, environmental pollution threat, increase scrap rate and other problems, and achieve the effect of strengthening corrosion resistance, high degree of automation and speeding up efficiency.

Inactive Publication Date: 2017-11-07
JIANGSU FENGDONG HEAT TREATMENT & SURFACE MODIFICATION ENG & TECH RES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] High-strength alloys are widely used in the manufacture of aircraft, ships and trucks, etc., which can increase their load capacity and improve operating speed, and have the characteristics of seawater corrosion resistance and magnetic avoidance; the alloys in the prior art have better wear and corrosion resistance. Low, high damage rate, the damage of the alloy often leads to the damage of the whole product, which greatly increases the scrap rate, and also poses a great threat to environmental pollution. In order to improve the utilization rate of the alloy, reduce the scrap rate, save Time-saving and labor-saving, the present invention proposes a vacuum heat treatment surface modification process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment is a vacuum heat treatment surface modification process, which removes the oxide film on the surface of various alloys formed by casting after pre-treatment, forms a layer of coating on the alloy surface and performs the heat treatment process under vacuum conditions. The process includes the following steps:

[0033] (1) Cast the alloy first, then polish the surface of the alloy, immerse the polished smooth alloy in a solvent for rinsing, and the rinsing time is 30 minutes;

[0034] (2) The alloy after rinsing is sent to a chemical solvent tank to remove the surface oil stains, and the alloy is ultrasonically cleaned in the process of removing oil stains, the ultrasonic vibration frequency is 80MHz;

[0035] (3) The cleaned alloy is sent to the vacuum annealing furnace for the first heating. The first heating is preheating. The preheating temperature is 200℃. After the preheating, the temperature continues to increase, and the heating speed is 20 ℃ / min, when ...

Embodiment 2

[0041] This embodiment is a vacuum heat treatment surface modification process, which removes the oxide film on the surface of various alloys formed by casting after pre-treatment, forms a layer of coating on the alloy surface and performs the heat treatment process under vacuum conditions. The process includes the following steps:

[0042] (1) Cast the alloy first, then polish the surface of the alloy, immerse the polished smooth alloy in a solvent for rinsing, and the rinsing time is 40 minutes;

[0043] (2) The alloy after rinsing is sent to the chemical solvent tank to remove the surface oil stains, and the alloy is ultrasonically cleaned in the process of removing the oil stains, the ultrasonic vibration frequency is 120MHz;

[0044] (3) The cleaned alloy is sent to the vacuum annealing furnace for the first heating. The first heating is preheating. The preheating temperature is 220℃, and the temperature is continuously increased after preheating, and the heating speed is 20 ℃ / ...

Embodiment 3

[0050] This embodiment is a vacuum heat treatment surface modification process, which removes the oxide film on the surface of various alloys formed by casting after pre-treatment, and forms a layer of coating on the surface of the alloy and heat treatment under vacuum conditions Process, the process includes the following steps:

[0051] (1) Cast the alloy first, then polish the surface of the alloy, immerse the polished smooth alloy in a solvent for rinsing, and the rinsing time is 35 minutes;

[0052] (2) The alloy after rinsing is sent to the chemical solvent tank to remove the oil on the surface, and the alloy is ultrasonically cleaned in the process of removing the oil. The ultrasonic vibration frequency is 100MHz;

[0053] (3) The cleaned alloy is sent to the vacuum annealing furnace for the first heating. The first heating is preheating. The preheating temperature is 210℃. After preheating, the temperature continues to increase, and the heating speed is 20. ℃ / min, when the h...

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Abstract

The present invention is a vacuum heat treatment surface modification process, which includes the following steps: (1) casting the alloy first, then grinding the surface of the alloy, immersing the smooth polished alloy in a solvent for rinsing; (2) Put the alloy after rinsing into a chemical solvent tank to remove surface oil, and ultrasonically clean the alloy during the process of removing oil; (3) Send the cleaned alloy into a vacuum annealing furnace for the first heating, When the heating temperature reaches 600-650°C, keep it warm for 60-80min, then quickly cool to 300-350°C and then heat it for the second time; (4) Pre-oxidize the alloy sent out of the furnace, and then send the alloy into vacuum (5) Send the alloy into the quenching furnace to complete the quenching; (6) Send the quenched alloy into the tempering furnace, heat it to 200-230°C, and keep it warm for 1- Allow to cool naturally after 3 hours.

Description

Technical field [0001] The invention relates to the technical field of heat treatment, in particular to a vacuum heat treatment surface modification process. Background technique [0002] High-strength alloys are widely used in the manufacture of aircraft, ships and trucks, which can increase their load capacity and speed, and have the characteristics of resistance to seawater erosion and magnetism. The alloys in the prior art have better wear resistance and corrosion resistance. Low, the damage rate is large, the damage of the alloy often causes the overall damage of the product, which greatly increases the scrap rate, and also poses a great threat to environmental pollution. In order to improve the utilization rate of the alloy, reduce the scrap rate, and save It saves time and effort, and the present invention proposes a vacuum heat treatment surface modification process. Summary of the invention [0003] The technical problem to be solved by the present invention is to overco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/773C21D1/76C21D11/00C23C8/24C23G5/036
CPCC21D1/773C21D1/76C21D11/00C23C8/24C23G5/036
Inventor 史有森袁彬
Owner JIANGSU FENGDONG HEAT TREATMENT & SURFACE MODIFICATION ENG & TECH RES CO LTD
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