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Low-temperature tempering method

A low-temperature, tempering oil technology, applied in the direction of quenching agent, heat treatment equipment, manufacturing tools, etc., can solve the problems of mismatch, tempering oil does not have the anti-rust performance of the workpiece, poor anti-rust performance, etc., to achieve easy cleaning, good thermal Oxidation stability, heat transfer, oil mist reduction effect

Inactive Publication Date: 2014-03-26
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the tempering oil in the prior art does not have antirust performance on workpieces, and the addition of common antirust agents also has the problem of mismatching with other components in the tempering oil and poor rust resistance. A New Low Temperature Tempering Method

Method used

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Experimental program
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Effect test

Embodiment 1~10

[0022] Pump the base oil into the blending kettle, turn on the agitator and the heating switch, and when the oil is heated to 65°C, add the required amount of each component in turn, and continue to heat and stir at 65°C for 3 hours to obtain a uniform yellow liquid. There are a total of 100 parts of each component in the tempering oil composition, wherein each component and its content are shown in Table 1, and the corresponding performance index results are shown in Table 3 and Table 4.

[0023] In Table 1, T161A is high molecular weight succinimide, which was purchased from the Additive Factory of Jinzhou Petrochemical Company. T511 is 4,4-methylene bis(2,6-di-tert-butylphenol), Beijing Xingpu Fine Technology Development Company. T534 is alkylated diphenylamine, Beijing Xingpu Fine Technology Development Company. L-AN100, total loss system oil, Takahashi Refinery. L-AN150, total loss system oil, Takahashi Refinery. HVI650, lube base stock, Takahashi Refinery. HVI750, lu...

Embodiment 11

[0043] Under the condition of 150°C, the workpiece to be tempered was tempered in the tempering oil composition of [Example 3] for 3 hours. During use, it exhibits good thermal oxidation stability and heat transfer performance, and produces less sludge. The tempering oil composition can be used for 15 hours a day and can be used for one year. At the same time, after tempering, it has a short-term anti-rust effect on the workpiece, and no rust spots will appear for 40 days. It is easy to clean later, and the step of applying anti-rust oil is omitted, which saves production costs.

Embodiment 12

[0045] Under the condition of 200°C, the workpiece to be tempered was tempered in the tempering oil composition of [Example 8] for 2 hours. During use, it exhibits good thermal oxidation stability and heat transfer performance, and produces less sludge. The tempering oil composition can be used for 16 hours a day and can be used for one year. At the same time, after tempering, it has a short-term anti-rust effect on the workpiece, and no rust spots will appear for 30 days. It is easy to clean later, and the step of applying anti-rust oil is omitted, which saves production costs.

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Abstract

The invention relates to a low-temperature tempering method which is mainly used for solving the problems of the prior art that the tempering oil does not have anti-rust property on a workpiece and a common antirust agent added is not matched with other components in the tempering oil and the anti-rust property is bad. The method provided by the invention solves the problems by adopting a technical scheme as follows: a workpiece needing tempering is subjected to tempering treatment in a tempering oil composition for 0.5-8 hours at 130-260 DEG C; and the tempering oil composition comprises the following components in parts by weight: a) 0.5-8 parts of antirust agent; b) 0.1-8 parts of purification dispersant; c) 0.05-3 parts of antioxidant; d) 0.001-3 parts of brightening agent; and e) 75-98 parts of base oil. The method provided by the invention can be applied to the low-temperature tempering process of various parts of the industries of automobiles, bearings and tools.

Description

technical field [0001] The invention relates to a low-temperature tempering method. Background technique [0002] Tempering, also known as tempering, is a metal heat treatment process in which the quenched workpiece is reheated to an appropriate temperature lower than the lower critical temperature, and after a period of heat preservation, it is cooled in air, water or oil. Its purpose is mainly to reduce or eliminate the internal stress generated during quenching, or reduce the hardness and strength of the workpiece to improve its ductility or toughness. The tempering process includes high temperature tempering (500~600°C), medium temperature tempering (300~400°C) and low temperature tempering (160~260°C). The corresponding tempering heating equipment generally adopts electric furnace, salt bath furnace and oil bath stove. Usually, only oil is used as a medium for low temperature tempering, which is called tempering oil. In the industry standard SH / T 0564, tempering oil ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/58C21D1/18
Inventor 郑春燕李谨陈晨黄劲松邓象贤
Owner CHINA PETROLEUM & CHEM CORP
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