METHOD FOR FORMING SINTERED LAYER ON SURFACE OF METALLIC BASE BODY

摘要

PURPOSE:To obtain a sure sintered layer by adhering tightly an alloy powder sheet consisting of specific weight % of wear resistant eutectic alloy powder and acrylic tacky binder to the surface of a metallic base body and holding the same at and for a prescribed temp. and time in a non-oxidative atmosphere then sintering the sheet. CONSTITUTION:An alloy powder sheet consisting of 94-99% wear resistant eutectic alloy powder and 6-1% acrylic tacky binder is adhered tightly to the surface of a metallic base body. The sheet is then held for at least 5min at a relatively low temp. of 150-380 deg.C in a non-oxidative atmosphere of nitrogen, hydrogen, etc. and is then heated up to the sintering temp. by which the sheet is sintered. Since the sheet is preheated at the low temp. prior to heating up to the sintering temp., a tar pitch-like material is formed and the substantial adhesion strength of the alloy powder sheet is obtd. The substantial adhesion strength up to the sintering temp. of the alloy powder is thus obtd. and the sintered layer is surely formed.