PURPOSE: To manufacture a valve in an internal combustion engine having excellent heat resistance, corrosion resistance, gas sealing property, crack resistance and peeling resistance by setting a cover across gap from lower face of a bevel body packing metal powder having heat resistance and corrosion resistance into this gap and executing hot isostatic pressing treatment.
CONSTITUTION: The cover 12 is set across the gap for forming lining layer from the lower end of bevel body 11 in a bevel part 1 to peripheral edge part and sheet surface, and the powder 13 for lining is packed into this gap. The above cover 12 is ordinarily formed with a soft metal plate of mild steel plate, etc. Further, as the above powder 13 for lining, high alloy powder having excellent heat resistance and corrosion resistance is used. Successively, to the above bevel body 11, the HIP treatment is applied after degassing-closing. By this method, the powder 13 for lining is integrally sintered to form the lining layer 16. After that, the cover 12 is removed and a shaft part 2 is stuck to upper end of the bevel part 1 formed with the lining layer 16 on the outer peripheral face at the lower part of the bevel body 11, and by applying finish machining, sheet face 3 and fire contacting face 4 are formed on surface of the lining layer 16 to obtain the valve in the internal combusion engine.
TSUTSUMI MASAYUKI
FUKUDA TETSUGO
OKA RYOICHI
MITSUI SHIPBUILDING ENG