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A kind of low-consumption environment-friendly spring steel water-soluble quenching liquid and quenching process

An environmentally friendly, quenching liquid technology, applied in the direction of quenching agent, manufacturing tools, heat treatment equipment, etc., can solve the problems of harsh working environment in the workshop, affecting the quenching effect, cracking of workpieces, etc., and achieve excellent oxidation resistance. Effect

Active Publication Date: 2018-06-01
陕西雷帕得悬架系统有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the traditional heat treatment process of spring steel, ordinary quenching oil is commonly used as the quenching medium. This traditional oil medium quenching method has low cooling speed and low hardened thickness, high oil consumption, harsh working environment in the processing workshop, and slightly difficult operation. If you are not careful, it will cause fire hazards, which is not conducive to energy saving and environmental protection. Although the choice of water-soluble quenching fluid is more environmentally friendly, it often has too fast cooling speed, which is easy to crack the workpiece and consumes a lot of quenching fluid. It is difficult to keep the active ingredients reasonable for a long time. concentration, so as to affect the quenching effect

Method used

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  • A kind of low-consumption environment-friendly spring steel water-soluble quenching liquid and quenching process
  • A kind of low-consumption environment-friendly spring steel water-soluble quenching liquid and quenching process
  • A kind of low-consumption environment-friendly spring steel water-soluble quenching liquid and quenching process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) Material: 50CrVA spring steel, the chemical composition (Wt%) is shown in Table 1, which meets the standard requirements. Material specification 500mm X24mm X90mm, 500mmX 25mmX 90mm. The single-leaf spring weighs 20-25Kg, and the total weight of the test material is 80 tons.

[0034] Table 1 Chemical composition of experimental materials (mass fraction, %)

[0035]

[0036] 2) In the continuous furnace, uniformly heat the material to the quenching temperature of 800±10°C, and the quenching and heating holding time is 30-45 minutes.

[0037] Prepare the quenching liquid according to the following mass fraction ratio:

[0038] Phenothiazine (or tert-butylhydroquinone), 0.6%; triethanolamine, 1.5%%; preservatives, 0.1%%; methyl silicone oil, 0.2%%; the rest: methoxypolyethylene glycol.

[0039] The quenching liquid and liquid water are proportioned according to the ratio of mass fraction 2:8, and the solution temperature is 20°C. The maximum cooling rate of the q...

Embodiment 2

[0042] 1) Material: 50CrVA steel, the chemical composition (Wt%) is shown in Table 2, which meets the standard requirements. Material specification 500mmX20mmX90mm, 500mmX24mmX90mm, 500mmX25mmX90mm. The single leaf spring weighs 10-20Kg, and the total weight of the test material is 200 tons.

[0043] Table 2 Chemical composition of experimental materials (mass fraction, %)

[0044] C

mn

Cr

V

Impurities

0.49

0.60

0.99

0.14

According to standard requirements

[0045] 2) In the continuous furnace, uniformly heat the material to the quenching temperature of 750±10°C, and the quenching plus holding time is 30-40 minutes.

[0046] Prepare the quenching liquid according to the following mass fraction ratio:

[0047]Phenothiazine (or tertiary butyl hydroquinone), 0.61%; triethanolamine, 1.8%; preservatives, 0.2%; methyl silicone oil, 0.25%; the rest: methoxypolyethylene glycol.

[0048] The quenching liquid and liquid water are mixed a...

Embodiment 3

[0051] 1) Material: 50CrVA steel, the chemical composition (Wt%) is shown in Table 2, which meets the standard requirements. Material specification 500mmX16mmX90mm, 500mmX18mmX90mm, 500mmX20mmX90mm. The single leaf spring weighs 10-20Kg, and the total weight of the test material is 200 tons.

[0052] Table 3 Chemical composition of experimental materials (mass fraction, %)

[0053]

[0054] 2) In the continuous furnace, uniformly heat the material to the quenching temperature of 950±10°C, and the quenching holding time is 30-40 minutes.

[0055] Phenothiazine (or N,N'-di-sec-butyl-p-phenylenediamine), 0.65%; triethanolamine, 2.5%; preservative, 0.35%; methyl silicone oil, 0.3%; diol.

[0056] The quenching liquid and liquid water are proportioned according to the ratio of mass fraction 3:7, and the solution temperature is 40°C. The maximum cooling rate of the quenching liquid is 120°C / s. After the workpiece is heated to 950±10°C and released from the furnace, put the s...

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Abstract

The invention discloses low-consumption environment-friendly spring steel water-soluble quenching liquid and a quenching process and belongs to the technical field of common spring steel heat treatment quenching liquid and processes. The quenching liquid is characterized in that the quenching liquid is composed of, by mass, an antioxidant, an anti-rust agent, a preservative, a defoaming agent and the balance methoxy polyethylene glycol. According to the low-consumption environment-friendly spring steel water-soluble quenching liquid and the quenching process, all the components are organically combined together, and the quenching performance of the quenching liquid can be played to the limit with the synergistic effect, namely, the defects of the quenching liquid are overcome through other functional components while the requirements for the good solubilizing performance and solubility inversing performance of basic solvent are met. When rapid oil or diesel oil quenching is replaced by the low-consumption environment-friendly spring steel water-soluble quenching liquid, the production cost is reduced and the production environment and natural resources are protected while resources are saved.

Description

technical field [0001] The invention belongs to the technical field of spring steel heat treatment quenching liquid and technology, and in particular relates to a low-consumption and environment-friendly spring steel water-soluble quenching liquid and a quenching process. Background technique [0002] Spring steel needs to be quenched before processing and use, that is, the steel is heated above the critical temperature, and after a period of heat preservation to make the structure austenitized, it is cooled at a cooling rate greater than the critical cooling rate to transform austenite into martensite , so as to improve the processing technology of steel's hardness, wear resistance, toughness and elasticity and other organizational properties. [0003] In the traditional heat treatment process of spring steel, ordinary quenching oil is commonly used as the quenching medium. This traditional oil medium quenching method has low cooling speed and low hardened thickness, high o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/60C21D1/18
CPCC21D1/18C21D1/60C21D2211/008
Inventor 孟宪芸李帅秦立富赵昱王宁
Owner 陕西雷帕得悬架系统有限公司
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