High performance nano metal/mine ore powder composite self repairing agent and its preparing method

Abstract

The present invention discloses one kind of high performance nanometer metal / ore powder composite self-repairing agent and its preparation process. The composite self-repairing agent is prepared with nanometer magnesium hydroxyl silicate ore powder 15-25 wt%, nanometer composite metal powder 6-12 wt%, nanometer magnesium hydroxyl silicate ore powder dispersant 0.5-2 wt%, nanometer composite metal powder dispersant 0.5-2 wt%, catalyst 0.2-2 wt%, stabilizer 1-5 wt%, cooperative metal friction additive 0.5-3 wt%, nanometer dispersant 2-5 wt%, auxiliary performance regulator 1-3 wt% and dispersing medium 41-73.3 wt%, and through certain technological process in certain technological conditions. It is used in lubricant oil and lubricant grease for nanometer composite repairing.

Description

Technical field: [0001] The invention relates to a novel lubricating oil and grease nano-composite self-repairing agent suitable for various metal friction pairs, in particular to a formula and a preparation method of a high-performance nano-metal / ore powder composite self-repairing agent. Background technique: [0002] In mechanical equipment, there are friction and wear phenomena of various friction pairs in relative motion. The existence of friction will consume mechanical power and reduce mechanical efficiency; the occurrence of wear will gradually cause mechanical parts to lose dimensional accuracy and fail, resulting in equipment scrapping. In various internal combustion engines for ships and vehicles, the occurrence of wear and tear will also lead to a decrease in the sealing of the cylinder, resulting in insufficient fuel combustion and environmental pollution of exhaust gas. According to statistics, 1 / 3 to 1 / 2 of the world's production energy is lost in friction an...

AI Technical Summary

Problems solved by technology

Although the nano-soft metal self-healing layer has a good anti-friction effect, due to the low hardness and poor bearing capacity of the nano-soft metal self-healing layer, the self-healing layer will be worn out soon in the case of extremely high pressure friction , therefore, it is necessary to continuously add self-healing agents, which increases the burden on users to a certain extent

Nano-ceramic self-healing agent, although it can form a self-healing ceramic layer with high hardness, has a good anti-wear effect, but most nano-ceramics are difficult to achieve good metallurgical bonding with metal friction pairs, and due to the expansion of ceramics and metals The coefficients vary greatly. Once the friction environment exceeds the specific allowable range, the self-healing film will fall off and fail, and in severe cases, it will have a bad impact on mechanical equipment

In addition, judging from the evaluation results of friction and wear performance in the laboratory and the results of actual use, most nano-lubricating additives still have problems such as poor dispersion stability and slow self-repairing speed.

Some uncoated nano-metal particle lubricating additives will also cause the deterioration of the lubricating oil body during use, and the acidity will increase, thereby causing matrix corrosion to the metal friction pair

Hard agglomerated particles with poor dispersibility not only cannot ensure suspension but also aggravate friction and wear