Heat treatment and rust and oil prevention method for surfaces of steel and iron parts

A technology for steel and steel parts, applied in heat treatment baths, heat treatment equipment, manufacturing tools, etc., can solve problems such as incomplete removal of oxide scales, incomplete removal of oxide scales, low stability of descaling solution, etc. , to achieve the effect of increased added value, low cost and high toughness

Inactive Publication Date: 2015-01-21
WUXI HUAYE IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sandblasting rust removal requires large investment, high cost, high labor intensity, and pollutes the environment; and strong acid pickling is prone to over-corrosion, and secondary rust often occurs after pickling, and a large number of steel equipment is exposed to the air for a long time. It is corroded at a very fast speed; in some rust removal and anticorrosion methods, the rust removal solution used contains unstable sodium sulphate, so the stability of the rust removal solution is not high, and the rust removal speed is not fast; In addition, it is better to use methods such as cleaning and brushing to remove the rust on the metal surface, but it is not thorough to remove the oxide scale, especially it is more difficult to remove the ...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Electrolyte quenching is carried out on steel parts, and then soaked in 10% dilute hydrochloric acid solution for 20 minutes to observe whether the surface turns black. If there are no black spots, there are soft spots, and then repeat the quenching treatment, and the steel Soak in a solution of benzotriazole sodium: 7%, fatty alcohol polyoxyethylene ether: 8%, calcium hydroxide: 11%, heating temperature is 40°C, keep warm for 30 minutes, rinse with water, and then place the steel Magnesium hydroxide: 5%, chromium hydroxide: 10%, mix the two evenly into an aqueous solution for 35 minutes, then soak in clean water for 10 minutes, rinse, put in a high-temperature furnace and heat it to 700°C in an alkali bath, and put the following The solution is sprayed on the steel surface, the coating thickness is 35μm, and the percentages are as follows: HNO 3 1.7%, Hcl5%, H 2 SO 4 2%, NCl2.7%, NaNO 3 6.1%,Ni(NO 3 ) 2 1%, 3% alkyl alcohol phthalamide, 0.1% hexamethylenetetramine...

Embodiment 2

[0016] Electrolyte quenching is carried out on steel parts, and then soaked in 13% dilute hydrochloric acid solution for 40 minutes to observe whether the surface turns black. If there are no black spots, there are soft spots, and then repeat the quenching treatment, and the steel Soak in a solution of benzotriazole sodium: 10%, fatty alcohol polyoxyethylene ether: 10%, calcium hydroxide: 15%, heating temperature is 50°C, keep warm for 50 minutes, rinse with water, and then place the steel Magnesium hydroxide: 10%, chromium hydroxide: 15%, mix the two evenly into an aqueous solution for 45 minutes, then soak in clean water for 20 minutes, put it in a high-temperature furnace and heat it to 750°C, and then spray the following solutions Brush on the surface of steel parts, the thickness of the coating is 46μm, and the percentages are as follows: HNO 3 3.2%, Hcl7%, H 2 SO 4 3%, NCl4.2%, NaNO 3 7.5%,Ni(NO 3 ) 2 3%, 5% alkyl alcohol phthaloamide, 0.2% hexamethylenetetramine, a...

Embodiment 3

[0018] Electrolyte quenching is carried out on steel parts, and then soaked in 12% dilute hydrochloric acid solution for 35 minutes to observe whether the surface turns black. If there are no black spots, there are soft spots, and then repeat the quenching treatment, and the steel Soak in sodium phenylacryltriazole: 9% fatty alcohol polyoxyethylene ether: 9% calcium hydroxide: 12% solution, heat at 48°C, keep warm for 42 minutes, then place the steel in magnesium hydroxide: 8%, chromium hydroxide: 12%, mix the two evenly into an aqueous solution for 40 minutes, soak in clean water for 13 minutes, put it in a high-temperature furnace and heat it to 730°C, then put it into an alkali bath, and spray the following solutions on the surface of the steel parts, The thickness of the coating is 42 μm, and the percentages are as follows: HNO 3 2.4%, Hcl6%, H 2 SO 4 2.4%, NCl3.4%, NaNO 3 6.5%,Ni(NO 3 ) 2 2.4%, 3.5% alkyl alcohol phthaloamide, 0.05% hexamethylenetetramine, and the re...

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Abstract

The invention discloses a heat treatment and rust and oil prevention method for surfaces of steel and iron parts, and belongs to the technical field of steel and iron. Firstly, the quenching treatment is performed for the steel and iron parts; the rust and oil prevention treatment is performed after the pretreatment; and then, the electroplating treatment is performed, so that the rust and oil prevention time is longer, and the surfaces of steel and iron materials can be prevented from forming rust spots again; and an antirusting agent contains no phosphate, and contains no nitrite harmful to human bodies and environment, so that the discharge treatment of the antirusting agent is convenient, the environment is not polluted, the antirusting agent is green and environment-friendly, is suitable for the coating pretreatment of steel parts with various shapes and sizes, can enable the surfaces of steel products to have good wear resistance and improved corrosion resistance, and enable the heart parts to have high roughness, good flexibility and strong insulativity, high-temperature impact resistance and bending resistance, therefore, the service life of the steel products is largely prolonged, and the added value and the industrial benefit of the steel products are largely improved.

Description

technical field [0001] The invention relates to steel, and its anti-rust, anti-corrosion and anti-oil. Especially the surface heat treatment of iron parts and the anti-rust and anti-oil treatment methods. Background technique [0002] A single physical or chemical method is often used to remove rust on the surface of steel. In the past, sandblasting and strong acid pickling were mainly used for rust removal. Sandblasting rust removal requires large investment, high cost, high labor intensity, and pollutes the environment; and strong acid pickling is prone to over-corrosion, and secondary rust often occurs after pickling, and a large number of steel equipment is exposed to the air for a long time. It is corroded at a very fast speed; in some rust removal and anticorrosion methods, the rust removal solution used contains unstable sodium sulphate, so the stability of the rust removal solution is not high, and the rust removal speed is not fast; In addition, it is better to us...

Claims

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Application Information

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IPC IPC(8): C23F17/00C21D1/18C21D1/38C21D1/44C23C22/50C23F11/06C25D3/12
Inventor 张明
Owner WUXI HUAYE IRON & STEEL
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