阅读说明：本技术 一种金属拉拔润滑剂及其制备方法 (Metal drawing lubricant and preparation method thereof ) 是由 姚华强 何友德 刘安荣 何瞻 王振杰 彭伟 于 2019-12-13 设计创作，主要内容包括：本发明涉及拉丝润滑技术领域,尤其是一种金属拉拔润滑剂及其制备方法,经过在蓖麻油酸酯类与醇类有机物反应过程中加入钛酸酯偶联剂和硅烷偶联剂的混合物,改善了由蓖麻油酸酯类与醇类有机物反应制备金属拉拔用的润滑剂在金属线材表面的附着力,提高了润滑剂的阻燃性能,防止了在金属线材拉拔过程产生高温导致润滑剂燃烧的现象产生,提高了金属拉拔过程钢丝表面光滑性,降低了金属拉拔过程钢丝表面与模具之间的摩擦系数,降低了拉拔能耗,保证了拉拔钢丝产品的品质。(The invention relates to the technical field of wire drawing lubrication, in particular to a metal drawing lubricant and a preparation method thereof.)

1. A metal drawing lubricant preparation method, react ricinoleic acid esters with alcoholic organic matter under the catalytic action of catalyst, characterized by, add titanate coupling agent and silane coupling agent mixture in the reaction process; wherein: the ricinoleic acid esters are methyl ricinoleate and/or polyoxypropylene ricinoleate; the alcohol organic matter is isooctanol and/or isobutanol; the catalyst is a solid strong acid catalyst and/or a D001 resin catalyst; the conditions of the reaction process are as follows: mixing ricinoleic acid esters and alcohol organic matters, adding the mixture into a reaction kettle, adding a catalyst accounting for 0.2-0.8% of the mass of the mixed solution, stirring for 8-12min at the speed of 150-200r/min, heating to 92-95 ℃, stirring while heating, adding a titanate coupling agent and silane coupling agent mixture during stirring, and reacting for 1-2h at constant temperature to obtain the castor oil.

2. The method of preparing a metal drawing lubricant according to claim 1, wherein the solid strong acid catalyst is SO₄ ^2-/WO₃And/or SO₄ ^2-/TiO₂。

3. The method of preparing a metal drawing lubricant according to claim 1, wherein the mixing volume ratio of ricinoleic acid esters to alcohol organics is 1: 3-4.

4. The method for preparing the metal drawing lubricant according to claim 1 or 3, wherein the mixing volume ratio of the ricinoleic acid esters to the alcohol organic substance is 1: 3.5.

5. The method of preparing a metal drawing lubricant according to claim 1, wherein the titanate coupling agent and the silane coupling agent mixture are mixed in a mass ratio of 1: 0.2-0.5.

6. The method of preparing the metal drawing lubricant according to claim 1 or 5, wherein the mixing mass ratio of the titanate coupling agent and the silane coupling agent mixture is 1: 0.3-0.4.

7. The method of preparing a metal drawing lubricant according to claim 1 or 5, wherein the titanate coupling agent and the silane coupling agent mixture are mixed in a mass ratio of 1: 0.35.

8. The method of preparing a metal drawing lubricant according to claim 1, wherein the titanate coupling agent and silane coupling agent mixture is added to the reaction vessel in an amount of 1% by mass of ricinoleic acid esters based on the mass of titanate coupling agent.

9. Metal drawing lubricant prepared according to any one of claims 1 to 8, for use in the production of drawn steel wire.

Technical Field

The invention relates to the technical field of wire drawing lubrication, in particular to a metal drawing lubricant and a preparation method thereof.

Background

The metal drawing is a plastic processing technology for obtaining wires or pipes with high precision and high glossiness by reducing the sectional area of processing materials through a die hole, belongs to a shape mark processing technology, is widely applied to various metal materials such as carbon steel, stainless steel, alloy steel, copper, aluminum, alloy and the like, and can produce thousands of products with different specifications and purposes such as bars or pipes with diameters as large as tens of millimeters, wires and threads with diameters as small as micrometers. The metal drawing process needs to consume a large amount of energy, the energy consumption is on the friction between the die and the drawing material, the temperature of a drawing interface is increased in the drawing process, a large amount of heat is generated, and the yield and the qualification rate of a metal drawing product are low.

However, with the continuous development of metal drawing technology, the drawing efficiency is continuously improved, so that the quality requirement on the lubricant is higher and higher, the lubricant has good lubricating property and cooling property, the treatment of the next process cannot be influenced, and the lubricant also has high-temperature resistance and wear resistance, so that the phenomena of cracking and even sintering of a lubricant film layer caused by the metal drawing process are avoided, and the smooth metal drawing is ensured. At present, in the metal drawing process, the adopted lubricant is mainly full-oil or synthetic, is prepared by taking vegetable oil and industrial product oil as main raw materials, and the cost of the lubricant gradually rises along with the continuous rise of the price of petroleum; the cooling effect of the all-oil lubricant is poor, and the generated heat causes oil to evaporate during metal drawing, so that unpleasant smell is generated, the environment of a production workshop is influenced, and the health of workers is threatened; in addition, the lubricant in the prior art has poor high temperature resistance, so that the lubricant film layer is damaged and even sintered by heat generated during friction between a metal material and a die in the drawing process, sparks are generated by drawing friction, and serious potential safety hazards exist.

In view of this, the present researchers found that a lot of research was made on the technical problem in the prior art through search.

For example, in order to improve the heat dissipation rate of the lubricant, generate oil mist and generate sparks, patent No. Z L200810026982.6 discloses a metal wire drawing lubricant which uses a water-based lubricant, a plant fermentation material, vegetable oil, nitride and water, wherein the nitride is an amide and/or ammonium salt, and the plant fermentation material is a lignocelluloses and/or lignosulfonate.

For another example: in order to reduce the friction coefficient, repair the friction surface, reduce the breakage rate of the metal wire and prevent the generation of unpleasant gas, the patent application No. 201611135240.8 discloses a preparation method of a metal wire drawing lubricant, which comprises the steps of preparing lubricating oil base oil by taking methyl ricinoleate as a raw material, compounding the prepared molybdenum disulfide with a graphene-like structure with a carbon nano tube dispersion liquid by using ultrasonic-assisted glass molybdenum disulfide crystals to obtain a dispersion liquid, stirring the lubricating oil base oil, polyvinyl alcohol and deionized water, adding the dispersion liquid, and mixing to obtain the metal wire drawing lubricant.

However, in the metal drawing process, the lubricant is required to have the performances of protecting the environment, weakening the safety risk, reducing the cost, improving the heat dissipation effect, ensuring the drawing speed and the like, and also to ensure strong adhesion, so that the metal is prevented from falling in the metal drawing process, and the dust generation rate of a metal drawing workshop is reduced. However, in the prior art, the lubricant used for metal drawing is not studied according to the lubricant adhesion capacity, so that the obtained lubricant product has low effect in the metal drawing process, a large amount of dust is generated in a metal drawing workshop, the metal wire breakage rate is high, and the product yield is low.

Disclosure of Invention

In order to solve the technical problems in the prior art, the invention provides a metal drawing lubricant and a preparation method thereof.

The method is realized by the following technical scheme:

the preparation method of the metal drawing lubricant comprises the steps of reacting ricinoleic acid esters with alcohol organic matters under the catalysis of a catalyst, and adding a titanate coupling agent and silane coupling agent mixture which account for 1% of the mass of the ricinoleic acid esters in the reaction process by the mass of the titanate coupling agent; the metal drawing lubricant is prepared by the catalytic reaction of ricinoleic acid esters and alcohol organic matters, the ricinoleic acid esters are rich in raw materials, the cost is reduced, and a mixture of a titanate coupling agent and a silane coupling agent is added in the reaction process, so that the mixture participates in the reaction of the ricinoleic acid esters and the alcohol organic matters, the adhesive force of the lubricant on the metal surface in the metal drawing process is improved, the heat dissipation efficiency is improved, the metal drawing speed is improved, and the dust generation rate of a metal drawing workshop is reduced.

Wherein: the adopted ricinoleic acid esters are methyl ricinoleate and/or polyoxypropylene ricinoleate, and when the methyl ricinoleate and the polyoxypropylene ricinoleate are preferably mixed according to the volume ratio of 1:1, the lubricating effect is good, the friction coefficient of the metal surface attached by the lubricant is reduced, and the metal drawing speed is improved; adopting alcohol organic matter as isooctyl alcohol and/or isobutyl alcohol, preferably mixing isooctyl alcohol and isobutyl alcohol according to the volume ratio of 1: 0.8; the catalyst is a solid strong acid catalyst and/or a D001 resin catalyst, and the solid strong acid catalyst and the D001 resin catalyst are preferably mixed according to the mass ratio of 1:0.1-0.3, so that the reaction effect of ricinoleic acid esters and alcohol organic matters is improved, the adhesive force of a lubricant on the metal surface is enhanced, the metal drawing speed is improved, and the production efficiency of drawn products is improved; the conditions of the reaction process are as follows: mixing ricinoleic acid esters and alcohol organic matters, adding the mixture into a reaction kettle, adding a catalyst accounting for 0.2-0.8% of the mass of the mixed solution, stirring for 8-12min at the speed of 150-200r/min, heating to 92-95 ℃, stirring while heating, adding a titanate coupling agent and silane coupling agent mixture during stirring, and reacting for 1-2h at constant temperature to obtain the castor oil.

Preferably, the solid strong acid catalyst is SO₄ ^2-/WO₃And/or SO₄ ^2-/TiO₂。

Preferably, the mixing volume ratio of the ricinoleic acid esters to the alcohol organic matters is 1: 3-4.

Preferably, the mixing volume ratio of the ricinoleic acid esters to the alcohol organic matters is 1: 3.5.

Preferably, the mixing mass ratio of the titanate coupling agent to the silane coupling agent mixture is 1: 0.2-0.5.

Preferably, the mixing mass ratio of the titanate coupling agent to the silane coupling agent mixture is 1: 0.3-0.4.

Preferably, the mixing mass ratio of the titanate coupling agent to the silane coupling agent mixture is 1: 0.35.

Compared with the prior art, the invention has the technical effects that:

by adding the mixture of the titanate coupling agent and the silane coupling agent in the reaction process of the ricinoleic acid esters and the alcohol organic matters, the adhesive force of the lubricant for metal drawing prepared by the reaction of the ricinoleic acid esters and the alcohol organic matters on the surface of the metal wire is improved, the flame retardant property of the lubricant is improved, the phenomenon that the lubricant burns due to high temperature generated in the drawing process of the metal wire is prevented, the surface smoothness of the steel wire in the metal drawing process is improved, the friction coefficient between the surface of the steel wire and a mold in the metal drawing process is reduced, the drawing energy consumption is reduced, and the quality of the drawn steel wire product is ensured.

The invention is suitable for being used as a lubricant when metal materials such as copper, iron, carbon steel, aluminum alloy and the like are drawn into corresponding wire materials, and has high heat dissipation efficiency; in the research process, the catalyst composition and the mixture ratio of the coupling agent mixture are controlled, so that the performance of the lubricant is greatly improved when the steel wire is drawn, the drawing temperature is reduced, the phenomenon of sintering into coke in the drawing process is avoided, the surface smoothness of the drawn steel wire is ensured, and the quality of the drawn product is ensured. The following tests show that: when the concentration of the lubricant is 2%, the strength of a film formed on the surface of the metal wire rod can reach above 71kg, and during the drawing process of the steel wire, no burning smoke and smog are found, so that the adsorption strength and the flame retardant property after the coupling agent is added are fully utilized, the comprehensive performance of the lubricant is improved to the maximum extent, the quality of the lubricant is improved, and the quality of a metal drawing product is ensured.

Detailed Description

The technical solution of the present invention is further defined below with reference to the specific embodiments, but the scope of the claims is not limited to the description.