Quenching medium and quenching method for steel cord

A technology of cooling medium and cooling method, applied in the direction of quenching agent, quenching device, furnace type, etc., can solve the problems of endangering human health, easy slagging of lead liquid, high labor intensity, etc., and achieve good product performance, low cost, and reduced The effect of energy consumption

Active Publication Date: 2016-09-07
NANJING KERUN LUBRICANTS
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Problems solved by technology

[0004] Although lead bath quenching has been widely used in many enterprises, there are many defects, mainly manifested as lead polluting the environment a

Method used

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  • Quenching medium and quenching method for steel cord
  • Quenching medium and quenching method for steel cord
  • Quenching medium and quenching method for steel cord

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[0023] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings, but the scope of protection of the present invention is not limited to this.

[0024] The quenching cooling medium for steel cord of the present invention is composed of the following components in mass percentage: 2 to 5% sodium carboxymethyl cellulose, 15 to 20% sodium polyacrylate, 3 to 5% additives and the balance is water .

[0025] The additives of the quenching cooling medium of the present invention include defoamers, rust inhibitors, bactericides and the like.

[0026] The quenching cooling medium of the present invention has a slow cooling rate in the high temperature zone (500°C-800°C), about 10°C / s, and a fast cooling rate in the low temperature zone (below 500°C), about 50°C / s.

[0027] The physical and chemical properties of the quenching cooling medium used in the steel cord of the present invention are shown in Table 1:

[0028] Table 1

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Abstract

The invention discloses a quenching medium for a steel cord. The quenching medium comprises the following components in percentage by mass: 2-5% of sodium carboxymethyl cellulose, 15-20% of sodium polyacrylate, 3-5% of additives and water in balancing amount. The invention further discloses a quenching method for the steel cord. The quenching method comprises the following steps: placing the steel cord, which naturally cools in air to 800 DEG C, in the quenching medium provided by the invention; and taking the steel cord out of the quenching medium at 450-550 DEG C by adjusting the size of a quenching region and a core feeding speed. After being taken out of the quenching medium, the steel cord is subjected to sorbite structural transformation in air by virtue of waste heat. The quenching medium provided by the invention is free of pollution, is environment-friendly, can replace high-pollution lead bath to perform sorbite structural transformation heat treatment of the steel cord, and also has favorable stability and cooling uniformity above 500 DEG C; and the quenching technology provided by the invention not only improves the operation environment on a production field, but also effectively reduces the energy consumption and is low in cost.

Description

technical field [0001] The invention relates to a heat treatment medium for steel cords, in particular to a quenching cooling medium for steel cords, and also to a method for quenching and cooling steel cords by the cooling medium. Background technique [0002] Steel cord is an ideal skeleton material for rubber products, especially car radial tires. Tires with steel cord as reinforcing material have the characteristics of high strength, low noise, long service life and high refurbishment rate. The construction of highways and the production of steel cords have also achieved rapid development. [0003] In order to improve the strength of the steel cord, the steel wire needs to be heat-treated, but the wire breakage is easy to occur during the heat treatment, which will greatly reduce the production efficiency. After continuous exploration by experts and scholars, it was found that the sorbite structure can be obtained by quenching in an isothermal lead bath. Such a structu...

Claims

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Application Information

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IPC IPC(8): C21D1/60C21D1/18C21D9/52C21D1/63
CPCC21D1/18C21D1/60C21D1/63C21D9/0062C21D9/525
Inventor 聂晓霖薛剑鸣左永平刘昊王涛
Owner NANJING KERUN LUBRICANTS
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