Jiaxing bearing cold treatment of ring

There is rotational, have HRB bearing ( ) Jiaxing bearing group sales co. , LTD. ( The company) Is bearing group co. , LTD. Established in jiaxing spot sales window, specializing in HRB brand bearings, facing the whole country, the existing stock 50 million yuan, covers the whole bearing, have very strong spot supply, is the group's retail sales center. 1. The effect of cold treatment precision bearing higher requirements for dimensional stability; Ring quenching ( Especially the interrupted quenching) After internal organization remains more residual austenite, the residual austenite is unstable, in the process of storage and use of the bearing, are constantly changing, so as to change the precision of the bearing. For cold treatment technique, it can reduce the residual austenite in the organization, and improve the hardness of parts slightly. 2. Stay cold treatment process after quenching at room temperature: after quenching and have to make the ring inside and outside even after cooling to room temperature to cold treatment, otherwise easy to crack, cold treatment immediately after cooling to room temperature ( Is generally not more than 30 min) , otherwise it will suspend austenite to martensite transformation. Cold treatment temperature: the temperature of the cold treatment mainly according to the steel martensitic transformation to end temperature Mf, also consider the effect of cold treatment on the mechanical performance and manufacturability. Cold treatment is chosen - for GCr15 steel 70℃； A high accuracy requirement not ring or equipment limited, optional for - cold treatment temperature 40 ~ - 70℃； Ultra precision bearing, can be in - 70℃～- Between 80 ℃ cold treatment. Too cold temperature affect bearing impact and contact fatigue life. Cold treatment insulation: although a lot of martensitic transformation is done between tilting moment cold to a definite temperature, but to make a batch of even have to cold treatment of ring surface and the core temperature, needs certain time of heat preservation, general is 1 ~ 1. 5 h after cold treatment of tempering: ring after cold treatment on the air, the temperature rising slowly to room temperature in a timely manner after tempering. Temperature rise too fast, or easy to crack; Tempering in time, otherwise the ring inside a larger residual stress will result in the crack of the ring, is generally not more than 2 h. If you are more interested in jiaxing bearing group co. , LTD. The author introduces the information or have any questions, please click on the website on the right side of the online customer service or call:, you full close jiaxing bearing purchasing consultant company. - - - - - - Editor: jiaxing bearing sourcing consultant LTD. All rights reserved, The company) Reprint please indicate the source