Blackening process of the hottest clean and enviro

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Clean and environment-friendly steel blackening process

Jinhu brand steel blackening agent adopts the principle of polymer organic polymerization and uses the tempering waste heat during the heat treatment process to form a film and blacken. The prepared working fluid can be recycled and easy to operate. It is a new type of steel surface treatment process material with environmental protection, energy saving and water saving, and is the best plan to reduce production costs. Under the cycle of demographic dividend, it is widely used in the blackening of the surface of standard parts, fasteners, screws, nuts, chains, gears, springs, spring pads, bicycle parts, auto parts, machine tool parts, hydraulic parts, engineering machinery parts, railway equipment and other steel parts made of carbon structural steel, alloy structural steel, cast iron, powder metallurgy and other steel materials

I. product advantages

1. Water soluble emulsion, environmental protection and safety

2. Supporting production with heat treatment belt furnace, high efficiency and energy saving

3. The heat treatment process forms a continuous operation to complete tempering and blackening at one time

4. After blackening, the workpiece has luster, corrosion resistance and strong rust resistance

5. Reduce labor intensity and improve production environment

6. Save energy, reduce costs and improve productivity

7. No pickling before blackening, no washing after blackening, and no discharge of three wastes

8. The workpiece is free of hydrogen embrittlement pinholes and burrs after blackening

9. Completely replace the traditional alkaline cooking to eliminate pollution

II. Application example of blackening process flow in belt furnace:

III. application method

1. Preparation of blackening solution

A. preparation of blackening agent working solution: the original solution should be fully shaken or stirred evenly, and the concentration and which type of blackening agent should be used should be determined according to the size of the workpiece and the tempering temperature. Generally, the percentage of blackening agent in water is 350%, and the concentration of 200 is%

the principle of use is that the large concentration of workpiece is low, and the small concentration of workpiece is high

b. Addition of blackening agent working solution: when adding in the middle of work, be sure to dilute it before adding it, and never add the original solution

c. Temperature control of working fluid: cooling and circulating devices must be added to the working fluid tank, and the temperature should be maintained at 40 ℃ -45 ℃, and the maximum should not exceed 60 ℃

2. Fazhong Zhongwang is a member of the upstream and downstream cooperation mechanism of civil aircraft aluminum. 1. The processing of black workpieces

assembly line operation. Workpieces cannot bring other chemicals into the tempering furnace. Before entering the tempering furnace, whether the quenching medium is water or oil, we can use the "W-20 intermediate cleaning rust inhibitor" or other rust inhibitor produced by our factory for cleaning and treatment before entering the tempering furnace. When the workpiece successively enters the working fluid, the liquid inlet temperature of the workpiece shall not be lower than 350 ℃ for 350 type and not lower than 200 ℃ for 200 type. In a word, the higher the temperature, the better the effect of different types of blackening agents, but the maximum temperature should not exceed 600 ℃ to ensure the adhesion between the blackening film and the matrix. After the workpiece is raised from the working fluid, it should be dried. The drying temperature is ℃. If the primary blackening effect is poor, the secondary blackening can also be carried out

3. Concentration analysis and addition adjustment of working fluid

during the use of the prepared working fluid, it is constantly impregnated by hot workpieces. 5. The oil collector of the horizontal tension oil pump is not pressed on the pump body. The fascinating characteristics of film-forming material make graphene a promising preparation material in various practical applications. The substance is constantly deposited on the surface of the workpieces. With the consumption of the solution, the composition of the liquid is gradually changing, The concentration of the analytical solution should be tested regularly, and a new blackening agent should be added regularly in combination with the amount of production to keep the working solution within the specified concentration range. (end)

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