REINFORCEMENT OF PISTON CROWN

PURPOSE:To lower the Fe dilution ratio from a base material so as to reduce required padding thickness, to provide a high quality reinforced piston at a low cost by overlaying a nickel base alloy to the upper surface of the piston crown forming an internal combustion engine, by plasma powder welding...

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Bibliographische Detailangaben
Hauptverfasser:	TANAKA HIROSHI, NAKAO KENJIRO, KUSAKA TOSHIHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES BLASTING COMBUSTION ENGINES COMBUSTION ENGINES IN GENERAL CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INTERNAL-COMBUSTION PISTON ENGINES LIGHTING MECHANICAL ENGINEERING WEAPONS
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Beschreibung
Zusammenfassung:	PURPOSE:To lower the Fe dilution ratio from a base material so as to reduce required padding thickness, to provide a high quality reinforced piston at a low cost by overlaying a nickel base alloy to the upper surface of the piston crown forming an internal combustion engine, by plasma powder welding method. CONSTITUTION:A piston crown 18 is reinforced by overlaying a nickel base alloy to the upper surface of a piston crown 18 forming an internal combustion engine by means of plasma powder welding method. A plasma torch 1 is opposed to the upper surface of the piston crown 18, and the negative electrode of a power source is connected to a rod-shape electrode 2 while the positive electrode to the piston crown 18. Plasma working gas is fed from a channel 6 through a hole 7, and plasma arc is generated from a nozzle 12 between the rod-shape electrode 2 and the piston crown 18, while powder 14 for overlaying is fed therein and melted. A welded bead 19 of, for example, approximately 2 millimeter is deposited and formed on the upper surface of the piston crown 18.