(under subclass 425) Apparatus in which portions of the bit are connected together by (1) locally heating the parts to a fluid state and allowing the base metals to flow together with or without the addition of other molten metal or (2) connecting the parts by means of a dissimilar fluid metal having a lower melting point.
(1) Note. This subclass includes depositing weld material on a part of the bit as, for example, to form a wear surface or a cutting edge.
SEE OR SEARCH THIS CLASS, SUBCLASS:
375, for a rolling cutter bit having a welded portion.
