Method for preparing special-purpose coat for breadboard or circuit board crushing knife tool
Title:
Method for preparing special-purpose coat for breadboard or circuit board crushing knife tool
Application Number:
200710175265
Application Date:
2007/09/28
Announcement Date:
2008/02/13
Pub. Date:
Publication Number:
101122002
Announcement Number:
Grant Date:
Granted Pub. Date:
ApplicationType:
Invention
State/Country:
11[China|beijing]
IPC:
C23C 4/10C23C 4/12B32B 18/00
Applicant(s):
Tsinghua University
Inventor(s):
Li Jinhui, Yang Lianwei, Liu Huafeng, Shi Pixing
Key Words:
preparing method, special-purpose coat, breadboard, circuit board, crushing knife tool
Abstract:
The invention relates to a method of making a special coating for a wire board or a circuit board crushing tool, which belongs to the technical field of crushing equipments. The method takes tungsten carbide as matrix, titanium carbide and chromic compound as wear resistant phase, and cobalt and iron as addition agent. The coating of the tool is a layer of graded coating, which is divided into an inner layer and an outer layer. After the components are evenly mixed into powder in certain proportion, spray painting is directly conducted on the matrix material by means of hot spray painting: the spray painting of the inner coating powder is first conducted and then the outer coating powder. The special purposed coated tool made by the invention is provided with good break tenacity, hardness and interfacial bonding strength, and is characterized by good wear resistance and chemical stability, etc. The tool has advantages of simple making technology and short production cycle, and the spray painting area and the coating thickness can be adjusted on demand. The tool is not only suitable to be a crushing equipment for waste wire boards/circuit boards, but also suitable to be other crushing equipments.
Claim:
Priority:
PCT:
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2008-4-17
  Selected patents owned by Tsinghua University filed in 2005 are loaded.
2008-3-31
  Selected patents owned by Tsinghua University filed in 2006 and 2007 are load.







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