Oil Compsition for heat treatment of gear and gear treated therewith

A technology for heat treatment of oil and composition, applied in heat treatment furnace, heat treatment equipment, lubricating composition, etc., can solve the problems of increased treatment cost, complicated treatment operation, time-consuming and the like

Inactive Publication Date: 2003-10-22
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current countermeasures for this kind of bump damage have various problems such as complicated processing operations, increased processing costs, and time-consuming in practice. In fact, their applicable objects are limited to gears with extremely heavy loads and high-end automotive gears.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0045] Embodiment 1-4 and comparative example

[0046] The respective components were blended into the base oil at the ratios shown in Table 1 to prepare the heat treatment oil compositions (quench oils) of Examples and Comparative Examples. Using the quenching oil (fresh oil) of these Examples and Comparative Examples, the brightness, cooling performance and FZG gear test of the test sheet were carried out according to the following methods. The results are shown in Table 2.

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PUM

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Abstract

An oil composition for the treatment of gears which comprises as a base oil a mineral oil having a dynamic viscosity at 100 deg.C of 5 to 40 mm2/sec and incorporated therein (a)0.01 to 5 wt% phosphoric ester compound based on the whole composition. It optionally further contains, based on the whole composition, (b) 0.5 to 10 wt% alkenylsuccinimide compould, alkylsuccinimide compound, or boron adduct of either and (c) 0.5 to 10 wt.% at least one member selected among the salicylates, phenates, and sulfonates of alkaline earth metals. The oil composition is used in a gear hardening step, in which the composition forms a surface coating film simultaneously with gear hardening. Thus, it can impart pitching resistance to the gear.

Description

technical field [0001] The present invention relates to a heat treatment oil composition for gears and gears treated with the same, more specifically, the present invention relates to a gear quenching process that can form a surface film while the gears are hardening, so that the gears have anti-turbulence (Pitting) heat treatment oil composition, and gears hardened with this heat treatment oil composition. Background technique [0002] Automotive gears are usually manufactured by cutting or plasticizing materials such as SCR415, 420, 430 and SMC415, 420, 430, carburizing, quenching, and tempering to harden them. The quenching oil used in the cooling process of the quenching process is generally the so-called martensitic austempering oil or modified martensitic austempering oil. [0003] However, such gears for automobiles are subject to increased loads due to reductions in the size and thickness of automobiles due to weight reduction in recent years, and increases in horse...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M137/04C10M169/04C21D1/58C21D9/32
Inventor 中村英一
Owner IDEMITSU KOSAN CO LTD
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