Several forms of bearing ring fracture temperature

Analysis several different forms of high temperature bearing ring fracture first, we can see the relevant research on high temperature bearing ring defects of fracture reasons are: 1. When the inclusions in the raw materials, brittle element of osteoporosis, segregation, carbide defects such as liquefaction, mesh, zonal segregation even not eliminate or improve in the process of machining, can form stress concentration, weaken the basic strength of the ring, become the source of crack. Disposal measures for the administration: prevention and control measures is insisted on a supply of main channel, and try to reduce purchasing work quality security and stability of solid steel, strengthen inspection on purchases of steel storage, good clearance from the source. 2, grinding process have crack development present disposal methods: enhance grinding process monitoring, high temperature bearing rings are not allowed to waste of grinding and grinding burns cracks exist, especially with the screwdriver can do not have the inner surface of the burn. If rings should stop all inspection after pickling, through product burns, severe burns can't repair or repair damage should be discarded, do not allow the grinding burns to ring assembly process. 3, heat treatment of improper disposal measures for the administration: to deal with some types of medium enterprises bearing ring soft point defects such as high temperature impact, should determine the composition and properties of quenching oil, not request to advance to change, to the rapid quenching oil replacement, to strengthen the quenching medium for hardening ability, improve quenching technology conditions. Tough tempering process. More time according to the fracture problem is serious attack, in the ring after coarse grinding stop using secondary tempering, a stable as well as through the further development of organization and the dimensions of the ring, can decrease again ooze grinding stress, improves performance of the traditional grinding transformation layer. High temperature bearing ring fracture mainly has three ways, namely, fatigue fracture, fracture and thermal overload fracture. 1, fatigue fracture of high temperature bearing ring ( Special ring) Under the action of alternating load and impact load, from time to time by the fatigue strength limit of stress more than data, fatigue crack, crack, eventually extended to a certain degree, cause the parts under high stress fracture. High temperature bearing outer ring is the impact of the bearing area of the common, due to the outer ring is usually cooperate with high temperature bearing box hole as clearance, and high temperature bearing box is a change of elliptic parts, under alternating load and impact load is easy to form the fatigue fracture. 2, overload fatigue fracture, fracture stress are used as bearing high temperature, the tensile strength is greater than the time information, which makes the internal cracks, usually because of improper means, such as high temperature bearing device is tilted, the high temperature bearing in the partial load, high temperature of bearing overload caused by fracture; In addition to high temperature in bearing assembly improper tapping, falling cracking overload also attributable to cracking. When there is a common interference device the size of the high temperature bearing and stated, too much interference will result in the crack of the high temperature of bearing ring ( There are four cylinder of high temperature bearing inner ring interference fit) Interference by the inner ring happen too much larger stress of the inner ring interference, especially the thin cross section ( The thickness of the cross section