Carbon steel bearings in the bearing code for “/CS”, indicating that the parts of such bearings are made of high-quality carbon structural steel.
Carbon steel bearings are widely used in household appliances, financial equipment, power tools, pneumatic tools, textile machinery, medical equipment, sports equipment, office furniture, food packaging machinery, door and window pulleys, fishing gear and toys, etc. This kind of bearing is suitable for low speed and light load (such as cart vehicles, apparatus casters, sliding doors, manual machinery) use. For example: 6200/CS,6200-Z/CS,6200-2Z/CS.
Carbon steel in the carbon content of 0.0218% to 0.25% for low carbon steel, 0.6% to 2.11% of the carbon steel is high carbon steel, in between them is the carbon steel, the difference in performance is also very big, generally is the carbon content in a certain below (about 1%), the strength of the material can improve, but no carbon content limit as long as the carbon content increases on the toughness decline, hardness rise. Carbon steel bearing rings and rolling bodies usually use high-carbon chromium bearing steel. Most of the bearings, use JIS steel grade SUJ2, is the domestic chrome steel (GCr15).
For low speed, light load environment use of carbon steel bearings, rotational accuracy, vibration and noise is the secondary requirements of carbon steel bearings, in order to ensure the normal use of mechanical products, carbon steel bearings are standard size deep groove ball bearings, its external dimensions in line with the provisions of the relevant standards, carbon steel bearing structure variant is relatively single.
Carbon steel bearings are characterized by low price, the use of the occasion is not too high requirements for bearings. Hardness, wear resistance, life expectancy, etc. than the conventional bearing steel bearings to be worse.
First, carbon steel bearings in terms of service life length. Their use time life has a big difference, bearing steel life is long, many junk bearings are carbon steel bearings, mainly hardness and wear resistance are not as good as bearing steel bearings.
Second, in terms of wear resistance. Low carbon steel only in the surface carburizing surface quenching, and not all hardened. Many low-grade carbon steel bearings on the market is simply hardened, wear resistance is extremely poor.
Third, in the process and the use of the effect. It is not that carbon steel bearings are not good, it depends on which machinery is used, because some do not need high-grade, with carbon steel bearings on the right week. Of course, Luo steel to good but the cost is much higher, the standard bearing steel is Gcr15.
Fourth, in the bearing material and performance. For example, the bearing collar and rolling body one to repeatedly withstand high contact pressure, in addition to the rolling contact accompanied by sliding, while maintaining high precision rotation. Therefore, the bearing collar, rolling body and cage material and performance whether to achieve the following requirements: high elastic limit; rolling fatigue strength; to have high hardness; good wear resistance; good toughness against impact load; good dimensional stability. In addition, there should be good processability. It is confirmed that the bearing steel has the above required performance, but carbon steel bearings can not guarantee.
Fifth, it is not that carbon steel bearings have the advantages of bearing steel is not good nowhere, it depends on where to use. Carbon steel bearings are noisy, have a particularly short life span, and withstand particularly low pressure, but can be used in places where hardness and ultimate speed are relatively small.
Surface strengthening technology can be formed from different angles of a variety of classification methods, according to the physical and chemical processes of surface strengthening technology for classification, can be broadly divided into five categories: surface deformation strengthening, surface heat treatment strengthening, chemical heat treatment strengthening, surface metallurgical strengthening, surface film strengthening.