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Spray quenching medium

A technology of quenching medium and mass ratio, applied in the direction of quenching agent, heat treatment equipment, manufacturing tools, etc., can solve the problems of high rapid quenching efficiency, low production efficiency, small deformation, etc., achieve efficiency improvement, cost saving, and increase convection The effect of thermal velocity

Inactive Publication Date: 2014-10-08
武汉永正科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing quenching techniques include austempering, graded quenching, rapid quenching, etc. In comparison, austempering and graded quenching have good hardenability, but high energy consumption and low efficiency; rapid quenching has high efficiency and low energy consumption
In the rapid quenching process, oil quenching has the advantages of moderate cooling speed and small deformation. It controls the quenching oil at a certain temperature in advance, immerses the workpiece heated to the rated temperature into the quenching oil, and cools the workpiece with the quenching oil to achieve The purpose of quenching, its high cost, high energy consumption, low production efficiency

Method used

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  • Spray quenching medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Preparation of spray quenching medium 1: first dissolve 3kg of antioxidant and 2kg of brightener in 650kg of No. 32 mechanical oil, then add 300kg of No. 100 mechanical oil, and finally add 45kg of refrigerant, and stir evenly. Wherein the antioxidant is composed of p-phenylenediamine, 6-tertiary butyl-4-methylphenol, thiodipropionate diester with a mass ratio of 1:1:2, p-phenylenediamine is 1.5kg, 6 - 1.5 kg of tertiary butyl-4-methylphenol and 3 kg of diester thiodipropionate. The brightener is composed of sodium benzoate, nicotinic acid, nonylphenol polyoxyethylene ether and benzylidene acetone with a mass ratio of 3:1:1:1.

[0024] Add the spray quenching medium 1 into the spray oil tank on the spray quenching furnace, open the pressurization equipment to pressurize the spray quenching medium; set the quenching temperature to 850°C and the fuel injection time to 12s according to the quenching material 65Mn. The flow rate of spray quenching medium is 30L / s; heat the...

Embodiment 2

[0027] Preparation of spray quenching medium 2: first dissolve 5kg of antioxidant and 3kg of brightener in 700kg of No. 32 mechanical oil, then add 250 kg of No. 100 mechanical oil, and finally add 42 kg of refrigerant, and stir evenly. Wherein the antioxidant is composed of p-phenylenediamine and 2,6-tertiary butyl-4-methyl-2 with a mass ratio of 1:1, and the brightener is composed of sodium benzoate and benzylidene acetone with a mass ratio of 1:1 .

[0028] Add the spray quenching medium 2 into the spray oil tank on the spray quenching furnace, open the pressurization equipment to pressurize the spray quenching medium; The flow rate of spray quenching medium is 20L / s; heat the workpiece to be quenched and perform quenching treatment.

[0029] The surface of the obtained quenched workpiece is quickly hardened, and there are individual soft spots after complete hardening, and the energy consumption is small.

Embodiment 3

[0031] Preparation of spray quenching medium 3: first dissolve 2kg of antioxidant and 3kg of brightener in 750kg of No. 32 mechanical oil, then add 200kg of No. 100 mechanical oil, and finally add 45kg of refrigerant, and stir evenly. The antioxidant is composed of p-phenylenediamine, 6-tertiary butyl-4-methylphenol and thiodipropionate diester with a mass ratio of 1:1:1. The brightener is composed of sodium benzoate, nicotinic acid, nonylphenol polyoxyethylene ether and benzylidene acetone with a mass ratio of 1:1:1:1.

[0032] Add the spray quenching medium 3 into the spray oil tank on the spray quenching furnace, open the pressurization equipment to pressurize the spray quenching medium; set the quenching temperature to 850°C and the fuel injection time to 18s according to the quenching material 30CrMo The flow rate of spray quenching medium is 25L / s; heat the workpiece to be quenched and perform quenching treatment.

[0033] The resulting quenched workpiece is quickly har...

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Abstract

A spray quenching medium comprises, by mass, 20-35% of No.100 machine oil, 60-75% of No.32 machine oil, 0.2-0.5% of an antioxidant, 0.2-0.3% of a brightener and 2-5% of a cooling accelerant. The spray quenching medium can be used in spray quenching of metal heat treatment, and can be normally used in a range from normal temperature to 150DEG C without heating or cooling; the spray quenching medium can be sprayed on a workpiece to greatly increase the convection heat transfer speed, the cooling time is 10-20s only, and the efficiency increases 3-5 times; and the oil spraying time and the oil spraying amount can be conveniently adjusted, so the best cooling performance and the best quenching quality are guaranteed.

Description

technical field [0001] The invention relates to the field of metal heat treatment, in particular to a spray quenching medium. Background technique [0002] Machine transmission parts, hardware tools and precision instruments must be quenched to increase their hardness and wear resistance. Existing quenching techniques include austempering, graded quenching, rapid quenching, etc. In comparison, austempering and graded quenching have good hardenability, but high energy consumption and low efficiency; rapid quenching has high efficiency and low energy consumption . In the rapid quenching process, oil quenching has the advantages of moderate cooling speed and small deformation. It controls the quenching oil at a certain temperature in advance, immerses the workpiece heated to the rated temperature into the quenching oil, and cools the workpiece with the quenching oil to achieve The purpose of quenching, its cost is high, energy consumption is big, and production efficiency is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/58
Inventor 张才勇付挽得
Owner 武汉永正科技发展有限公司
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