How can the inner hole of the heat treated workpiece be cleaned if there is oil stains

After the metal workpiece is processed, a large amount of lubricating oil, cutting oil, anti-rust oil, etc. will remain on the metal surface, and it is easy to clean it with alkaline degreaser. However, some parts are more difficult to clean, such as soybean oil and other oil stains when drilling the workpiece, so after drilling, part of the drilling oil will remain in the screw hole. Due to the special cylindrical structure and internal thread structure of the screw hole, bubbles will form in the screw hole during cleaning, which will hinder the entry of cleaning agent and affect the degreasing effect in the screw hole.

Heating and ultrasonic cleaning can help remove some of the air bubbles, but they still can't completely expel the air bubbles. Therefore, the cleaning agent needs to be based on a surfactant with strong wetting, which strongly wets the screw hole to burst the air bubbles, and at the same time emulsifies to remove the oil stain in the screw hole.

TexEnt629A has excellent wettability and degreasing properties, and can be used with ultrasonic cleaning to completely wet the screw holes and discharge air bubbles. Texent629A is compounded with other surfactants, additives, etc., which can completely immerse the screw hole with the cleaning agent to exert the degreasing performance of the cleaning agent, completely clean the remaining oil stain in the hole, and then enter the next processing process.

Removal method: 2 oxalic acid solution can be washed in about 50 warm water to remove, and then rinsed with water.

After grinding 3 4 vitamin C tablets into a powder, sprinkle on the soaked stain and then scrub with water several times to remove rust stains.

If it is rust stains, you can use 10 oxalic acid and citric acid to add water mixture to soak the rust area, then soak it in concentrated salt water, and wash it after 1 day.

Summary. Cleaning of residual oil on the surface of the workpiece after quenching in heat treatment oil.

Alkaline water cleaning method. The simplest alkaline water cleaning is a direct or indirect heating bath, and the cleaning solution is (3% 10%) Na2CO3 or NaOH aqueous solution. Carburizing (carbonitriding) workpieces, tempered.

How to clean the oil on the surface of the workpiece after heat treatment and quenching?

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Cleaning of residual oil on the surface of the workpiece after quenching in heat treatment oil.

Alkaline water cleaning method. The simplest cleaning of hidden air alkaline water is the cleaning tank of direct heating or indirect heating of the jujube, and the cleaning solution is (3% 10%) Na2CO3 or NaOH aqueous solution. Carburizing (carbonitriding) workpieces, tempered.

After cleaning, the product should be tempered with what to clean.

Tempering without cleaning will produce a lot of smoke.

That's right, because if I don't temper it, it will produce a lot of smoke, and it will be harmful to the body.