In pressure processing, the primary role of lubricants should be lubrication. Sometimes, in order to improve the quality of processing or improve the efficiency of production processing, it is necessary to increase the temperature during processing. However, high temperature will put higher requirements on the hardness and strength of the tool, and adhesion wear and occlusion are prone to occur between the tool and the blank. At this time, the lubrication and cooling of the press working are very important. In the cutting process, the friction in the cutting will generate a lot of heat, resulting in an increase in the cutting temperature, which can sometimes be as high as 1 000 °C or more. In order to ensure the quality of cutting, lubrication and cooling are equally important at this time. Solid lubricants used in mechanical processing are generally added as additives to oil-based or water-based lubricating coolants. Commonly used solid additives are graphite, bentonite, kaolin, calcium carbonate, sodium silicate, borate, MoS2, glass and lead, etc.