Title:
HIGH-HARDNESS PRECISE ETCHING KNIFE DIE
Document Type and Number:
WIPO Patent Application WO/2018/176905
Kind Code:
A1
Abstract:
The invention provides a high-hardness precise etching knife die, including the following components by wt.%, C: 0.07-0.09%，Si: 0.33-0.35%，Mn: 1.5-1.7%，P: 0.01-0.03%，S: 0.001-0.003%，Nb: 0.015-0.017%，Ti: 0.023-0.025%，Ni: 0.3-0.5%，Cr: 0.7-0.9%，Cu: 0.2-0.4%，Al: 0.06-0.08%, the balance being Fe and impurities. The heat treatment process of the high hardness precision etching knife die includes the following steps: (1) heating the etching knife die to 750-770°C, maintaining the temperature for 15-17 min, air cooling for 10-13 min, heating to 650-670°C, compressing air to rapid cooling to 450-470 °C, and air cooling to room temperature; and (2) heating the etching knife die to 550-570°C, maintaining the temperature for 12-14 min, spraying water to cool to 370-390°C, heating to 610-630°C, water cooling to 310-330°C, and air cooling to room temperature.
Inventors:
LIU HAO (CN)
Application Number:
PCT/CN2017/115356
Publication Date:
October 04, 2018
Filing Date:
December 09, 2017
Export Citation:
Assignee:
LIU HAO (CN)
International Classes:
C22C38/02; C22C38/06; C22C38/42; C22C38/48; C22C38/50; C22C38/58; B26F1/44; C21D6/00; C21D9/00
Foreign References:
| CN106987769A | 2017-07-28 | |||
| CN101163807A | 2008-04-16 | |||
| CN102301026A | 2011-12-28 | |||
| CN104011242A | 2014-08-27 | |||
| CN105695703A | 2016-06-22 | |||
| JP2003293075A | 2003-10-15 | |||
| CN103898415A | 2014-07-02 |
Attorney, Agent or Firm:
NANJING LI & FENG INTELLECTUAL PROPERTY AGENCY (SPECIAL GENERAL PARTNERSHIP) (CN)
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