- Deep groove ball bearings
- Cylindrical roller bearings
- Aligning ball bearings
- Stainless steel bearings
- LNSERTED bearings
- Ball introduced
- Plain Bearings
- Needle Roller Bearings
- Angular contact ball bearings
- Thrust Roller Bearings
- Spherical roller bearings
- Thrust Ball Bearings
- Rolling mill bearings
- Tapered Roller Bearings
- Plastic bearings
- Linear motion bearings
| Common types of low temperature bearing steel bearing steel | |||
| 点击数：3832 日期：2014/4/4 | |||
| In space technology, provides the turbine pump bearing liquid fuel to run in the Liquid Oxygen and liquid hydrogen as a rocket. The temperature and the liquefied gas. Because of the common bearing steel is martensite, originally toughness is not ideal, and the low temperature brittleness, such as for - 5 ～ - 200 ℃ low temperature, actually corrosion due to moisture in the air bearing surface condensation water, it should be made of stainless steel. The martensitic stainless steel cryogenic treatment, to ensure that the organization does not change. In Liquid Oxygen (boiling point - 183 ℃) in SUS4400 steel ball bearings and cylindrical roller bearings made running test results show that, in addition to retaining side bearing surface of some wear without exception, can withstand up to 20000r/min speed, but when the bearing holder must be manufactured with special material. Low temperature resistant bearing retainer itself are also useful for stainless steel, commonly used with SUS440V SUS304 steel and martensitic Austenitic, the former is easy to process, the use of more. In short, the key technology of low temperature resistant bearing steel is corrosion free low temperature brittleness and high condensate water, surface hardness and martensitic SUS4400 can reach HRC56 ~ 60, lower than the commonly used bearing steel, so the basic rated dynamic and static load and the basic rating, or the service life than common bearing steel bearing the same basic models of the same size should be lower, this point must be noted. |
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