Many people don't know whether bearing steel will rust. 37 years of experience in bearing manufacturers tell you: it will rust. Although the stainless steel plate is called stainless steel, it is actually rusty. In fact, there is no stainless steel in the world! What is the rusting process of bearing steel? The so-called stainless steel plate means that the degree of corrosion resistance is different. Corrosion rate <0.01mm/y means 'complete corrosion resistance'; corrosion rate <0.1mm/y means 'corrosion resistance'; corrosion rate> 0.1mm/y means 'no corrosion resistance', which means general steel. Except for a small part of bearing steel which is stainless steel bearing steel, most of them are steel with general corrosion resistance, so it is not strange at all to get rusty, it is a normal phenomenon. Why do bearings rust? The rust of the bearing is related to the material and the natural environment of the application. The bearing steel itself contains carbon, which will react when it encounters water vapor. If you want to prevent the bearing from rusting, you need to do a good job of rust prevention to solve this problem. Or use non-steel bearings. Metal products are very easy to rust after oxidation, and stainless steel bearings are no exception. There are many reasons for its rusting: such as the composition and structure of the metal composite material itself; There are many factors such as the surrounding environment, these are the direct factors that make the bearing rust. In addition, when we use bearings, we must not touch objects directly with our hands, because when sweat touches the bearings, a layer of sweat film will be formed on the surface of the bearings, and the sweat film will cause photoelectric catalytic effects on the bearings and corrode the bearings. Therefore, we need to use special tools such as special rubber gloves or finger guards to pick and place the bearings, instead of touching them with our hands. When the bearing manufacturer adopts GCr15 bearing steel material, will it rust in natural storage? Yes, and it will rust very much like ordinary stainless steel plates. The Cr content of this stainless steel plate is too small, and the Cr content of GCr15 is only about 1.5%. If the Cr content can be close to the junction of 13% The anti-rust effect is better under the condition of low temperature, for example, Cr12 (containing about Cr12%) stainless steel is almost not rusty. Can bearing steel be rust-proof? Although the Cr content of bearing steel is relatively high, it has a certain anti-rust effect, but the Cr content of stainless steel is small, and the Cr content of GCr15 is only about 1.5%. At this time, the Cr element is to improve the structural mechanics of stainless steel. The effect of the characteristics, the Cr of the bearing steel is to better improve the cutting performance and not to prevent rust. Like ordinary metal materials, wet and cold environments can also cause rust. Therefore, anti-rust measures for bearings and parts are very necessary. Only when the torque is accurate can the rotation be stable!
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