[Catalog:News] [Date:2020-9-16] [Hits:] [Return]

Before we get to the specific components of the friction modify-Mohs hardness, a standard commonly used for mineral hardness, which USES a diamond needle to cut the surface of the ore and grades it into 10 grades based on the depth of the scratch.Simply put, talc is grade 1, diamond is grade 10 (as the saying goes, without diamond, don't get porcelain).So, a diamond is a 10, and in fact, this mohs hardness thing, it's not a very precise definition.But it's easy to understand why it's used to evaluate a friction regulator - scratches are friction.

Talk about clutch friction material (Part 1)

Talk about friction modifiers.Its classification is very simple, according to the composition can be divided into organic and inorganic friction performance regulator two, according to improve the friction performance classification, and increase the friction of the so-called antifriction agent and reduce friction antifriction agent.Its main functions are:
(1) Adjust the friction performance
(2) Improve friction noise (think harsh braking noise)
(3) Improve the thermal expansion coefficient, thermal conductivity, hardness, density, quality and other physical properties
(4) Improve the manufacturing process performance and processing performance of products (to withstand grinding, drilling and other process torture, will not fall apart)
(5) Reduce the production cost (see the composition of common friction performance regulator, you will know the cost is not high).

Then it was simple. The smart engineers used mohs hardness ≤3 as a friction reducer and mohs hardness > 3 as a friction booster.Start with antifriction. Remember when you stepped on a banana peel? What did it feel like?Slide?That's because the cells in the banana skin are made up of many thin layers. The structures between the layers are very loose, and the layers are filled with water, so when you step on them, the layers are lubricated by the water film, and you can easily splinter and fall down.In fact, friction reducer in other fields is lubricant, it also has similar characteristics, with more typical layered structure, can form a solid lubrication film on the friction surface.Common antifriction agents include nonmetallic mineral graphite, molybdenum disulfide, etc. (Remember when the zipper was not easy to pull, put pencil lead on the zipper, that is the lubrication effect of graphite);In addition, some soft metals such as lead, copper is also a common component of friction reducer, friction coefficient of friction reducer is less than 0.1.