Title:
METHOD FOR PREPARING DIAMOND TOOL BIT FROM PURE IRON-BASED MATRIX
Document Type and Number:
WIPO Patent Application WO/2022/052990
Kind Code:
A1
Abstract:
The present invention provides a use of a pure iron-based matrix for the preparation of a diamond tool bit and a preparation method for a diamond tool bit. According to the present invention, a diamond tool bit prepared from a pure iron-based matrix manufactured by iron powder having an average particle size of 1-25 μm is used in different scenarios. The present invention reduces a moving distance of iron ions by using the iron powder having an average particle size of 1-25 μm, such that the activity of the iron powder is greatly improved, thus facilitating improving the hardness and strength of the diamond tool bit and increasing a holding force and wear resistance for diamond. In addition, the present invention also simultaneously controls a hot pressing sintering temperature of the diamond tool bit at 700-860°C and a pressureless sintering temperature at 900-960°C, so as to control a reaction speed of the iron powder and the diamond, so that the iron powder can not only be bonded with diamond by chemical bonds, but also not cause excessive carbonization of the diamond that affects the strength of a diamond tool bit, thereby obtaining a diamond tool bit featuring excellent comprehensive performance and low prices.
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Inventors:
ZHAO JINGXUE (CN)
BI KUN (CN)
ZHENG YIPING (CN)
BI KUN (CN)
ZHENG YIPING (CN)
Application Number:
PCT/CN2021/117464
Publication Date:
March 17, 2022
Filing Date:
September 09, 2021
Export Citation:
Assignee:
NEW SAGA MATERIALS SCIENCE & TECH CO LTD (CN)
International Classes:
B22F3/14; C22C26/00; C22C33/02
Foreign References:
| CN111961938A | 2020-11-20 | |||
| CN111267010A | 2020-06-12 | |||
| CN102350501A | 2012-02-15 | |||
| CN105903971A | 2016-08-31 | |||
| CN109986082A | 2019-07-09 | |||
| CN108274004A | 2018-07-13 | |||
| CN104399985A | 2015-03-11 |
Other References:
LI LIGANG, WANG ZHEN-MING;FENG HAI-ZHOU: "The Application Trend of Ultrafine Iron Powder Prepared by Chemical Method in Diamond Tools ", SUPERHARD MATERIAL ENGINEERING, vol. 28, no. 2, 30 April 2016 (2016-04-30), pages 5 - 9, XP055910960, ISSN: 1673-1433
GAO YA: "Influence of Ni and Sn on Structure and Properties of Fe-based Diamond Tool Matrix [D", CHINA ACADEMY OF MACHINERY SCIENCE & TECHNOLOGY, 2018
GAO YA: "Influence of Ni and Sn on Structure and Properties of Fe-based Diamond Tool Matrix [D", CHINA ACADEMY OF MACHINERY SCIENCE & TECHNOLOGY, 2018
Attorney, Agent or Firm:
CHENGDU ZHONGHENG ZHIHE PATENT AGENT FIRM (GENERAL PARTNERSHIP) (CN)
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