Title:
球状化構造の高炭素クロム軸受鋼の温間圧延リング成形方法
Document Type and Number:
Japanese Patent JP6698940
Kind Code:
B2
Abstract:
Disclosed is a process for forming, by means of warm ring rolling, a high-carbon chromium bearing steel capable of structure spheroidization, the process comprising the following steps: S1. a ring blank is heated, in a heating furnace, to 10ºC-40ºC above the critical temperature Ac1 of the material, and holding the temperature for a period of time; S2. the heated ring blank is slowly cooled along with the furnace to 0ºC-50ºC below the critical temperature Ar1 of the material; S3. the rolling reduction is rationally designed and the rolling feed speed is selected such that the ring blank is roll-formed within a certain deformation amount and deformation temperature range. The method directly achieves structure spheroidization by means of warm ring rolling, can omit traditional spheroidization annealing, and obtains a more finely spheroidized structure, significantly reduces energy and time consumption, improves structure quality and reduces production costs.
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Inventors:
Qian Dongsheng
Flower forest
Hair flower
Orchid
Don Kato
Flower forest
Hair flower
Orchid
Don Kato
Application Number:
JP2019513306A
Publication Date:
May 27, 2020
Filing Date:
June 12, 2018
Export Citation:
Assignee:
Wuhan University of Technology
International Classes:
C21D8/00; B21B5/00; B21H1/00; C21D1/32; C21D9/40
Domestic Patent References:
| JP11347673A |
Foreign References:
| CN106834653A |
Other References:
HENKEL J、外6名,Thermomechanische Behandlung beim Ringwalzen―Simulation und Realisierung am Beispiel eines Waelzlagerstahls,Stahl und Eisen,ドイツ,1988年 6月13日,Vol.108 No.12,Page.595-603
Attorney, Agent or Firm:
Kimura Mitsuru
Taiji Morikawa
Kei Sakurada
Mie Hideki
Taiji Morikawa
Kei Sakurada
Mie Hideki