Title:
ANNEALING AND HEAT TREATMENT METHOD FOR STEEL WIRE
Document Type and Number:
WIPO Patent Application WO/2018/107473
Kind Code:
A1
Abstract:
An annealing and heat treatment method for a steel wire, sequentially comprising steps of: heating, drawing, annealing, tempering, straightening, polishing, and applying an oil. The annealing method for a steel wire comprises steps of: (1) loading a steel wire into a furnace and heating to 450-500°C, and remaining the temperature for 1-2 h; (2) increasing the temperature to 700-750°C at a rate of 60-70°C/h, and remaining the temperature for 1-2h; (3) increasing the temperature to 850-900°C at the rate of 100-120°C/h, and remaining the temperature for 1-2h; and (4) reducing the temperature to 400-450°C at a cooling rate of 100-120°C/h, and removing the steel wire from the furnace. By employing the annealing process, the present invention improves chemical properties and processing properties, eliminates or reduces internal stress, and prepares a superior internal structure for a final heat treatment, thus providing the processed steel wire with excellent mechanical properties.
Inventors:
CAI SAI (CN)
Application Number:
PCT/CN2016/110418
Publication Date:
June 21, 2018
Filing Date:
December 16, 2016
Export Citation:
Assignee:
CAI SAI (CN)
International Classes:
C21D9/52; C22C38/24
Domestic Patent References:
| WO2012085651A8 | 2013-07-18 |
Foreign References:
| CN101168798A | 2008-04-30 | |||
| CN101205590A | 2008-06-25 | |||
| CN103131834A | 2013-06-05 | |||
| CN103993141A | 2014-08-20 | |||
| CN101287851A | 2008-10-15 |
Attorney, Agent or Firm:
NANJING LI&FENG INTELLECTUAL PROPERTY AGENCY (SPECIAL GENERAL PARTNERSHIP) (CN)
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