Title:
DIAMOND COATING MICRO DRILL BIT, AND PREPARATION METHOD THEREFOR AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2024/012611
Kind Code:
A1
Abstract:
A diamond coating micro drill bit, and a preparation method therefor and the use thereof, which belong to the technical field of micro drill bits. The method comprises: before a diamond coating is deposited, subjecting a micro drill bit to chemical pretreatment, wherein the diameter of the micro drill bit is 0.35-0.75 mm, the grain size is 0.3-1.0 μm, and the cobalt content is 4-8 wt%; the chemical pretreatment comprises a first acid etching, an alkali etching and a second acid etching; an acid etching liquid comprises nitric acid, hydrochloric acid and water in a volume ratio of 1 : 2-4 : 10-15; an alkali etching liquid comprises potassium ferricyanide, potassium nitrate and water in a volume ratio of 1 : 1 : 10; and the time taken for the three instances of etching is respectively 10-30 s, 2-6 min and 10-50 s. The method can significantly reduce the influence of the chemical pretreatment on the breaking strength of the micro drill bit and the preparation effect of the diamond coating, the Co removal effect is good, the etching efficiency is high, and the micro drill bit obtained can be used for machining circuit boards.
Inventors:
SHI QIAN (CN)
ZHANG YUMING (CN)
SU YIFAN (CN)
LIN SONGSHENG (CN)
ZHANG CHENG (CN)
TANG PENG (CN)
DAI MINGJIANG (CN)
HUANG SHUQI (CN)
ZHANG YUMING (CN)
SU YIFAN (CN)
LIN SONGSHENG (CN)
ZHANG CHENG (CN)
TANG PENG (CN)
DAI MINGJIANG (CN)
HUANG SHUQI (CN)
Application Number:
PCT/CN2023/123688
Publication Date:
January 18, 2024
Filing Date:
October 10, 2023
Export Citation:
Assignee:
INSTITUTE OF NEW MAT GUANGDONG ACADEMY OF SCIENCES (CN)
International Classes:
B23B51/00; C23C16/02; C23C16/27; C23C16/44
Foreign References:
| CN115896736A | 2023-04-04 | |||
| CN102312215A | 2012-01-11 | |||
| CN111088445A | 2020-05-01 | |||
| CN114293171A | 2022-04-08 | |||
| CN110983293A | 2020-04-10 | |||
| CN105803419A | 2016-07-27 | |||
| US5560839A | 1996-10-01 |
Attorney, Agent or Firm:
GUANGZHOU KEYUE I.P. LAW OFFICE (CN)
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