PURPOSE: To prolong the service life of a tool member by coating its working face made of cermet or metallic basic member with the artificial diamond film in average thickness from 0.2 to 20μm formed by means of precipitation.
CONSTITUTION: When preparing, as an example of basic member, a solid reamer of 10mm in diameter, comprising 0.5% of TiC, 0.5% of VC, 5% of Co, and the remainder of WC in weight, putting it in a artificial diamond precipitation generator employing the filameted thermo-electron radioactive material made of, for example, W, as a means of heating and activating the mixture of reaction gases, and processing it under the following conditions; a reactive container made of quarts tube of 120mm in outer-diameter, temperature of 700°C, reactive time of 6hr, and so forth, the artificial diamond film of 4μm in average thickness is precipitated on the working face of this reamer. The service life of tool members, thus, can be prolonged.
SHINGIYOUUCHI TAKAFUMI
YAMASHITA HIROAKI
NISHIYAMA AKIO
| JPS57100989A | 1982-06-23 |