PURPOSE: To manufacture such a hot saw blade as excellent in durability by forming a cutting edge through machining after padding a cemented carbide piece to the steel blade edge by means of deposit welding.
CONSTITUTION: A cemented carbide piece is pad-welded one by one to each of serrations 2 of a circular steel toothed blade 1, forming each tip 5 by a dresser, polisher, a grinding wheel or the like. As for the cemented carbide for this deposit welding, a cemented carbide of Co, W groups is used when such a cemented carbide of Ni group as hastelloy C276 is cut off, but when ordinary steel is cut off, a nickel group alloy is desirable. A steel blade is preheated at a temperature of 50-200°C, and the cemented carbide is pad-welded at every blade serration, subjected to stress relief heat treatment at 500-700°C, and welding residual thermal stress is removed, while a quenchhardening structure is tempered.
KOMASA RYOICHI
KITAMURA YASUFUMI
KOBAYASHI KAZUO
FUKUDA MASAYOSHI
MORI TOSHIKI
SHINKOONAN KK