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Title:
HIGH-HARDNESS PRECISION CARVING KNIFE MOLD
Document Type and Number:
WIPO Patent Application WO/2018/176904
Kind Code:
A1
Abstract:
A high-hardness precision carving knife mold, comprising the following components in percentage by weight: C: 0.27-0.29%; Si: 1.3-1.5%; Mn: 1.3-1.5%; P: 0.013-0.015%; S: 0.005-0.007%; Nb: 0.025-0.027%; Ti: 0.073-0.075%; Ni: 0.2-0.4%; Mo: 1.1-1.3%; Cu: 0.3-0.5%; Al: 0.11-0.13%; and the balance of Fe and impurities. A thermal processing method for the high-hardness precision carving knife mold comprises the following steps: (I) heating the carving knife mold to 850-870°C, preserving the heat for 11-13 minutes, water cooling to 650-670°C within 10-13 seconds, air cooling for 10-13 minutes, then heating the knife mold to 750-770°C, rapidly cooling to 350-370°C with compressed air, and air cooling to the room temperature; and (II) heating the carving knife mold to 650-670°C, preserving the heat for 17-19 minutes, cooling to 553-558°C with compressed air within 22-25 seconds, cooling the carving knife mold to 420-450°C with spray water, heating the knife mold to 710-730°C, water cooling to 410-430°C, and air cooling to the room temperature.

Inventors:
HAO LIU (CN)
Application Number:
PCT/CN2017/115355
Publication Date:
October 04, 2018
Filing Date:
December 09, 2017
Export Citation:
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Assignee:
HAO LIU (CN)
International Classes:
C22C38/02; C22C38/04; C22C38/06; C22C38/08; C22C38/12; C22C38/14; C22C38/16; C21D1/18; C21D6/00; C21D9/00
Domestic Patent References:
WO2016052093A12016-04-07
WO2016135793A12016-09-01
WO2012098938A12012-07-26
Foreign References:
CN107058868A2017-08-18
CN105695703A2016-06-22
CN102936699A2013-02-20
CN103518000A2014-01-15
CN105339518A2016-02-17
Attorney, Agent or Firm:
NANJING LI & FENG INTELLECTUAL PROPERTY AGENCY (SPECIAL GENERAL PARTNERSHIP) (CN)
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