A fully synthetic metal cutting fluid

Abstract

A full-synthetic metal cutting liquid comprises the following components in percentage by weight: 18-20% of an extreme-pressure lubricant, 6-7% of an antirusting agent, 0.1-0.5% of a defoaming agent, 0.5-1% of a bactericide and the balance of deionized water, wherein the extreme-pressure lubricant comprises 5.1-5.7% of boric acid, 8.6-9.2% of diethanol amine and 4.3-5.1% of thiourea, and the antirusting agent comprises 2.1-2.3% of triethanolamine, 1.9-2% of sodium tetraborate and 1.7-1.9% of sodium gluconate. A method for preparing the metal cutting liquid comprises the following steps: (1) synthetizing organic boric acid ester; (2) synthetizing the extreme-pressure lubricant; (3) preparing the antirusting agent; (4) preparing the full-synthetic metal cutting liquid. Proven by the results, the prepared metal cutting liquid is transparent and stable, is high in extrusion resistance, wear resistance and rust resistance, can be used for processing various materials such as aluminium alloy, cast iron, carbon steel and copper, is equal to foreign similar high-grade products in performance indexes, and achieves the effects of environmental protection, energy conservation and consumption reduction.

Description

technical field [0001] The invention relates to the field of cutting fluids, in particular to a fully synthetic metal cutting fluid that does not contain toxic and harmful elements such as Cl and P, is easy to prepare, and has a simple formula. Background technique [0002] At present, domestic scholars have made some progress in the research of fully synthetic cutting fluid. For example, Ji Hongbing, Dai Enqi, Li Chaosheng. High-performance water-based fully synthetic cutting fluid for green manufacturing[J]. Lubrication and Sealing. 2012, 37(3): 107-111. Developed lubricating additives using polyethers, etc. This kind of cutting fluid has good water solubility, and the extreme pressure additive does not contain harmful substances, but the formula is relatively complicated, the synthesis method is cumbersome, and the antirust performance needs to be further improved; XiaYQ, LiuWM, XueQJ.TribologicalpropertiesofP- andN-containingorganiccompoundsaspotentialextreme-pressurean...

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Problems solved by technology

For example, Ji Hongbing, Dai Enqi, Li Chaosheng. High-performance water-based fully synthetic cutting fluid for green manufacturing[J]. Lubrication and Sealing. 2012, 37(3): 107-111. Developed lubricating additives using polyethers, etc. This kind of cutting fluid has good water solubility, and the extreme pressure additive does not contain harmful substances, but the formula is relatively complicated, the synthesis method is cumbersome, and the antirust performance needs to be further improved; XiaYQ, LiuWM, XueQJ.TribologicalpropertiesofP- andN-containingorganiccompoundsaspotentialextreme-pressureandantiwearadditives[J]. LubricationScience, 2003, 15: 173-183. It was found that the phosphorus-nitrogen type extreme pressure antiwear additive has the characteristics of high load capacity, good compoundability and excellent lubrication, but this cutting fluid contains P element will cause red lakes to appear in rivers and lakes due to eutrophication. Some scholars choose to use short-chain chlorinated paraffin as the extreme pressure lubricant of cutting fluid. Although the extreme pressure lubrication performance of cutting fluid is improved, chlorinated paraffin It is one of seawater pollutants and does not meet the requirements of green environmental protection

Although the current fully synthetic cutting fluids in China have certain cooling and cleaning functions and have good visibility, most of the extreme pressure agents of fully synthetic cutting fluids contain toxic and harmful elements such as Cl and P, or there are very few fully synthetic cutting fluids. Cutting fluid does not contain toxic and harmful substances, but its preparation process is cumbersome, the formula is complicated, and the antirust performance needs to be further improved

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