Welded article and method of making same

Details Welded article and method of making same Welded article and method of making same

1978-12-26

1981-06-02

Haroian, Harry N.

Internal-combustion engines

Poppet valve operating mechanism

Tappet

F01L 114

Patent

active

042704960

ABSTRACT:
A cam follower having a two-piece composite laser welded configuration is disclosed and comprises a solid and alternatively thin wall tubular base (16) portion formed of mild steel and a thin-disc reaction portion (18) having a hardened, wear resistant outer surface portion (50). The reaction portion is joined to the base portion by laser welding which results in a weld zone (54) comprised of a fusion zone (56) bounded on either side thereof by heat affected zones (58) having relatively narrow transverse thicknesses. A method of laser welding the hardened reaction portion to the mild steel base portion is also disclosed.

REFERENCES:
patent: 2247278 (1941-06-01), Daisley
patent: 2963011 (1960-12-01), Davis et al.

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