Title:
CAST IRON COOKWARE AND METHOD FOR TREATING SURFACE THEREOF
Document Type and Number:
WIPO Patent Application WO/2019/205114
Kind Code:
A1
Abstract:
A method for treating the surface of cast iron cookware, comprising: putting the cast iron cookware into thermal treatment equipment and carrying out nitrocarburization at 500-700°C for 5-7h, wherein a permeating agent employed during the nitrocarburization comprises 65-80wt% of ammonia, 15-30wt% of nitrogen and 4-6wt% of carbon-containing gas; the nitrocarburization atmosphere contains: activated nitrogen, activated carbon, ammonia, nitrogen, carbon oxide, carbon dioxide, nitrogen oxide, nitrogen dioxide, hydrogen and water vapor. The thickness of a permeating layer on the surface of the cast iron cookware is 10-20μm. Also disclosed is the cast iron cookware.
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Inventors:
YANG ZHIWEN (CN)
Application Number:
PCT/CN2018/084973
Publication Date:
October 31, 2019
Filing Date:
April 28, 2018
Export Citation:
Assignee:
XINGTAI SANXIA CAST IRON CO LTD (CN)
International Classes:
C23C8/32; C23C8/80
Foreign References:
| CN106958019A | 2017-07-18 | |||
| CN106958019A | 2017-07-18 | |||
| CN1126769A | 1996-07-17 | |||
| CN101050517A | 2007-10-10 | |||
| US6406560B1 | 2002-06-18 |
Attorney, Agent or Firm:
BEIJING UTC LIANFENG INTELLECTUAL PROPERTY AGENCY (GENERAL PARTNERSHIP) (CN)
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