A kind of environment-friendly water-based quenching fluid composition and its preparation and use method

Abstract

The invention discloses an environment-friendly type water-based quenching liquid composition as well as a preparation method thereof and a using method thereof. The environment-friendly type water-based quenching liquid composition consists of the following raw materials: water-soluble low-molecular polyether compositions, an anti-rust agent, a bactericide, a pH stabilizer, a complexing agent, ade-foaming agent and water. According to the environment-friendly type water-based quenching liquid composition disclosed by the invention, two water-soluble low-molecular polyether compositions are taken as the principal things, and components such as boron, secondary amine, heavy metal, inorganic salt, diethanol amine and triethanolamine, which are harmful on a human body and the environment areavoided, so that the environment-friendly type water-based quenching liquid composition is safe and environmentally friendly. Using concentration is controlled, so that the environment-friendly typewater-based quenching liquid composition has correct cooling parameters and a correct quenching rate, and meets quenching process requirements of a steel ball; and moreover, the composition has excellent anti-rust ability for multiple metals (steel, copper, zinc and aluminum), and excellent antibacterial ability, and guarantees the performance and the service life of a quenching solution. The quenching solution does not affect surface quality and precision (especially higher than level G10) of a steel ball, is convenient for cleaning and water treatment, saves cost, and meets thermal treatmentrequirements and anti-rust requirements of the steel ball made of steel based materials such as carbon steel and stainless steel.

Description

technical field [0001] The invention relates to a water-based quenching liquid composition, in particular to an environment-friendly water-based quenching liquid composition and a preparation and use method. Background technique [0002] The quenching process is the most important process key point to improve the comprehensive performance of steel balls. The quenching medium used in this process must ensure that the austenite can be cooled at a rate exceeding the critical cooling rate. It must be cooled rapidly at 550-650°C, and must be cooled slowly below 300°C, so as to obtain the best martensite structure and Reduce internal stress. Therefore, the cooling parameters of the quenching medium are particularly important to the microstructure and macroscopic properties of steel balls, and at the same time, stability, economy and environmental protection must also be taken into account. Usually, the selection of quenching medium is mainly based on quenching oil, which is main...

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Problems solved by technology

[0004] Published patents or containing inorganic salts (including nitrite), low hardenability, easy to oxidize and corrode the substrate, easy to crystallize and precipitate at low temperatures and soft points; or water-containing glass (SiO 2 ), easy to adhere to jelly and penetrate into the matrix, difficult to clean and affect surface accuracy; or contain polyvinyl alcohol, poor hardenability, unstable cooling rate and large changes; or contain diethanolamine, triethanolamine harmful to the human body; or super molecular weight (Molecular weight > 30000) polyalkylene glycol (PAG) and ethylene oxide and propylene oxide random copolymer (the main synthetic component of PAG), high viscosity, large fluctuations in cooling parameters, high cost; or containing polypropylene (Amide) type, the cooling curve is almost straight, the cooling speed is slow, and it is not suitable for martensitic quenching

Therefore, the cooling medium, cooling parameters and quenching rate of the patented quenching liquid cannot meet the quenching process requirements of steel balls (especially >G10 grade steel balls)

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