Magnesium alloy cutting fluid and preparation method thereof

Abstract

The invention discloses magnesium alloy cutting fluid, which comprises the following raw materials in percentage by mass: 20 to 30 percent of water, 3.0 to 5.0 percent of EDTA4 sodium, 3.0 to 7.0 percent of isopropanolamine, 30 to 50 percent of naphthenic base oil, 5.0 to 7.0 percent of T702, 4.0 to 8.0 percent of phosphate ester, 3.0 to 6.0 percent of AEO-9, 2.0 to 5.0 percent of disinfectant and 4.0 to 8.0 percent of span 80. Specific bacterial inhibitors and mold inhibitors are added into the magnesium alloy cutting fluid respectively, so that the magnesium alloy cutting fluid avoids corrosion of magnesium alloy materials, can control bacterial reproduction effectively, and extend the service life of the cutting fluid greatly by synergizing with an extraordinary hard water resistance capability.

Description

technical field [0001] The invention belongs to the technical field of metal material processing, in particular to a production method of cutting fluid for magnesium alloy cutting. Background technique [0002] With the continuous advancement of modern processing technology and material technology, people have a soft spot for lighter and stronger materials, so people's demand for magnesium alloy materials has become stronger and stronger in recent years. Especially in some electronics industries, the demand has doubled. [0003] But although the magnesium alloy material has excellent performance, its processing is a very difficult task, because magnesium metal is a very active metal, which can burn at room temperature. The three main methods in modern machining are: [0004] A. Dry processing, that is, without using any cooling medium, but its processing method is very easy to produce metal dust. If magnesium metal is processed in this way, the magnesium metal dust will fo...

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Problems solved by technology

As a result, the water hardness of the cutting fluid is greatly increased, and the cutting fluid is prone to stratification, resulting in a short service life and frequent replacement

2) Due to the extremely active metal properties of magnesium alloy, it can react with water and organic amines in normal temperature cutting fluid, resulting in blackening of the surface of magnesium alloy workpieces and corrosion of workpieces

3) Since the metal properties of magnesium alloy are very active, once encountering water, even a very small amount of water vapor, hydrogen gas will be precipitated. Because the lower limit of explosion of hydrogen gas is 4%, there is a great possibility of explosion (such as a large amount of The accumulation of magnesium alloy scraps and meeting with water will cause the magnesium scraps to burn, and in severe cases, an explosion will occur

)4) The high hardness of the water in the magnesium alloy cutting fluid makes a large amount of antirust agent in the cutting fluid combined with magnesium ions, which will greatly reduce the antirust performance of the cutting fluid and cause the cutting fluid to corrode the machine tool

5) The anti-corruption ability of cutting fluid is poor, that is, the ability to inhibit bacterial reproduction is not strong

6) Waste liquid treatment does not conform to environmental protection

However, a large amount of free magnesium ions will be very destructive to the stability of the magnesium alloy cutting fluid, affecting the service life of the cutting fluid

[0008] In addition, insufficient protection of magnesium alloys is also the main problem of cutting fluids. During long-term processing, the surface of magnesium alloys is prone to oxidation and blackening.

At present, there is no suitable product for domestic cutting fluid, which can effectively avoid this situation.

[0009] The study also found that since most cutting fluids use silicon-containing defoamers, sometimes they will remain on the surface of magnesium alloy workpieces, causing some troubles to the subsequent processing of magnesium alloys

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