In recent years, there has been a trend of oil-based lubricants being replaced by water-based lubricants. Boron nitride coatings are often used in forging nickel based alloys, high melting point alloys, and titanium machined parts, which not only provide lubrication but also prevent workpiece oxidation.
Characteristics that forging lubricants should possess
1. Evenly moisten the surface to prevent local lack of lubrication;
2. There is no residue, as it can accumulate deep in the forging mold, affecting tolerances or surface quality of the workpiece, and cannot deposit or be difficult to remove on equipment or in the environment;
3. The mold should not corrode and a protective coating should be applied to the mold;
4. It has a certain cooling effect;
5. Suitable for automatic feeding, preferably suitable for spraying methods;
6. Not polluting the environment and not forming harmful substances to the body;
(The picture shows the effect of spraying release coating)
The role of boron nitride lubricant in forging process
Boron nitride lubricant used in forging process is a process material that is coated on the surface of metal, providing full protection from room temperature to high temperature, and playing a protective, lubricating, thermal insulation, and bonding role during pressure and thermal deformation. It has a dual effect of billet protection and mold lubrication.
Boron nitride lubricant can prevent or delay O2 at working temperature Diffusion and migration of H2, N2, and metal ions; Boron nitride lubricant has good adhesion and wetting properties with the metal substrate at working temperature, high pressure resistance, tensile strength, and good plasticity. It can be extended with the metal without breaking the lubricating film. Boron nitride lubricant reacts with the surrounding medium in an inert manner and does not corrode the metal; Boron nitride lubricant has a reasonable melting point, high temperature viscosity, and high thermal stability, especially at working temperature. The coating has self-healing properties. For applications with special requirements, boron nitride lubricant can achieve self stripping and anti slip, and can be applied to free forging of various metal materials; Boron nitride lubricant has a low thermal conductivity and good insulation performance, which can effectively improve the plasticity of metals. Boron nitride lubricant is an environmentally friendly material that does not contain toxic or volatile components. So it has functions such as protection (anti oxidation, anti decarburization, anti hydrogen absorption,...), lubrication, demolding, insulation, insulation, and high-temperature bonding, which can reduce deformation resistance, improve plasticity, and improve surface quality; Reduce metal material loss and extend the service life of molds. Generally speaking, the application of boron nitride lubricant can reduce the deformation resistance of forgings (more than 20%), improve the plasticity of metals, improve the surface quality of forgings, and extend the service life of molds (twice)
Boron nitride lubricant can be used in the temperature range of 400-1500 ℃. Widely used in: die forging, precision forging, isothermal forging, warm forging, sleeve forging, pipe extrusion, precision extrusion, warm extrusion, superplastic forming, plate rolling, stretching, piercing, billet forging, spinning, etc; Various special deformation parts, large structural parts, difficult to deform alloy hot forming, etc. It can also be used for heat treatment and protective coating, and can be used for different heating methods such as titanium alloys, high-temperature alloys, stainless steel, structural steel, other non-ferrous, black, and refractory alloys, hot working electric furnaces, oil furnaces, gas furnaces, induction heating, etc.
It must be pointed out that the application of boron nitride lubricant is one of the necessary means to achieve precision in forging blanks, which can improve the utilization rate of metal materials, reduce costs, save labor hours, and improve efficiency.
SAT NANO is the best supplier of boron nitride nanopowder and coating, we can offer 100nm, 1-3um, 10-50um particle, if you have any enquiry, please feel free to contact us sales03@satnano.com
