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Water-based coolant

A coolant and water system technology, applied in the directions of additives, quenching agents, heat treatment equipment, etc., can solve the problems of long steam film stage and uneven cooling, and achieve the effect of high cooling performance and not easy to corrode

Inactive Publication Date: 2014-11-05
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the steam film stage of this water-based heat treatment liquid composition is long, so it has the disadvantage of easily causing uneven cooling.

Method used

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  • Water-based coolant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～13、 comparative example 1～8

[0040] As shown in Table 1, various additives (inorganic acid salts, etc.) were dissolved in ion-exchanged water to prepare a water-based coolant as a sample solution. The concentrations of the additives were all set to 10% by mass based on the sample solution unless otherwise specified. In Examples 12 and 13, sodium bicarbonate was added in an amount exactly as described in Table 1.

[0041] Keep each sample solution at 50°C, conduct a cooling test according to JIS K2242B method, and measure the characteristic seconds

[0042] number. Specifically, the time (number of seconds) until the cooling curve reaches the temperature (characteristic temperature) at which the vapor film stage ends is measured. The results are shown in Table 1. In addition, the pH of each aqueous solution is also described in Table 1 together.

[0043] [Table 1]

[0044]

[0045] 1) The additive concentration was set to 5% by mass. the

[0046] 2) No additives. the

[0047] 3) 30% by mass of ...

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PUM

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Abstract

This water-based coolant is characterized by being obtained by mixing at least one of each of the following inorganic acid salts: phosphate, phosphite, sulphate, sulphite, borate, molybdate, tungstate, carbonate, hydrogen carbonate, and sesquicarbonate. This water-based coolant exhibits excellent cooling performance, and excellent anti-corrosion properties towards metal materials to be cooled therewith, and thus is suitable for use as a cutting fluid and a quenching fluid for metal materials.

Description

technical field [0001] The present invention relates to a water-based coolant, and specifically relates to a water-based coolant used for quenching of metal parts and the like. Background technique [0002] Coolants (heat treatment liquids) used for quenching of metal parts are broadly classified into oil-based and water-based (aqueous solutions), and oil-based heat-treatment liquids are widely used. This is because the oil-based heat treatment liquid has moderate cooling performance, and the quenching strain is small, so there is no need to worry about the occurrence of quenching cracks. [0003] On the other hand, in the case of extremely large metal parts and metal parts with poor hardenability, the oil-based heat-treatment liquid has a slow cooling rate and insufficient cooling performance, so a water-based heat-treatment liquid is used. However, since the cooling performance of water-based heat treatment liquid is higher than that of oil-based heat treatment liquid, un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/60
CPCC10N2230/12C10M173/02C10M2201/085C10M2201/084C10N2240/401C10M2201/062C21D1/60C10M2201/087C10M2201/08C10M125/10C10M125/22C10M125/24C10M129/40C10M129/42C10M129/48C10M2207/126C10M2207/127C10M2207/14C10M2215/221C10M2215/223C10M2219/106C10M125/26C10N2010/12C10N2030/08C10N2030/12C10N2010/02C10N2040/22C09K5/10
Inventor 长谷川真由后藤雅久市谷克实野口贤郎
Owner IDEMITSU KOSAN CO LTD
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