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Stainless steel bearing design characteristics

Stainless steel bearing as a new bearing products, many techniques, such as: symbol, technical requirements, material, processing technology, etc Are in constant change and development. In terms of bearing code said, common international S before bearing basic code, to identify, such as the $6204 2 rs, says the 6204 stainless steel double sealed bearing; Has the company is also a suffix to be identified. Such as: stainless steel shaft bearing FAG company, with a basic code + W 203 S + b logo. Our stainless steel bearing is expressed as a suffix H V bearing with 9 c r18 steel manufacturing, expressed as a suffix HV 1 9 c rl8M o steel shaft bearing manufacturing. Stainless steel bearing design and ordinary bearing design different nature, but the technical requirements and standard bearing steel bearing some differences. To in addition to execute the general design principles and standards of general bearing, also should pay attention to the following questions: 1) identify clear ring, cage, ball, rivets, tight sealing ring, skeleton, grease, peg material grades and hold the standard of screw. 2) the technical requirements of the part drawing to identify clear, put an end to logo on drawings to "dimensional accuracy in conformity with the relevant standards of the current regulations" and "heat treatment process and hardness in conformity with the relevant standards of the current" such as the general technical requirements. 3) with the current standard bearing structural parameters of the principle of generalization. 4) its series product design principle, try to be keep nesting, ring throwing, chariot, forging billet core reuse such as low cost Production principle; Given the corresponding the chariot to the ring size table and maintains a nesting table. F I, 5) groove curvature coefficient f e a slightly smaller than the standard bearing. 6) all the transition table surface and surface smooth transition to follow the original, all surfaces are not allowed to have sharp corners, burrs and scratches, pits, for the rust. The study of stainless steel bearing load rating and life issues International and domestic are reported. Generally believe that if hot place hardness achieve HRe60 above, the rated load capacity should be fairly with the G Crl5 steel bearings, but as a result of 9 cr18 containing complex carbide (Fe, Cr), C, and there are a large number of eutectic carbides in, carbide particles in its organization, the average size is bigger than the diameter of GCrl5 steel (lO times or so about bearing steel), according to the can to believe its breaks life should be lower than G Crl5 steel. According to the data table, in the role of equal contact stress, 9 cr18 L IO contact fatigue life and L50 is lower than G Crl5 steel about 70% and 15% respectively. At present, the common way is: 9 cr18 phase with bearing type of product the same as the GCrl5 steel rated dynamic load, Static load rating has two kinds of method: one kind take the same as the GCrl5 steel, a take with an 8 o % GCrl5 steel products is 75%.

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