Manufacturing method of austenitic stainless steel self-tapping

Details Manufacturing method of austenitic stainless steel self-tapping Manufacturing method of austenitic stainless steel self-tapping

1992-07-15

1993-04-27

Ramsey, Kenneth J.

Metal fusion bonding

Process

With removing or reshaping of filler material or flash after...

228176, 228232, 22826315, 470 11, B23K 2024, B23K10134, B23K10304

Patent

active

052054667

ABSTRACT:
This invention is a manufacturing method of Austenitic stainless steel self-tapping and self-drilling screw. It uses low carbon steel or low carbon alloy steel and forges or cuts it into a round rod with a shoulder, non-threaded bolt, and drilling end portion. After it is carburized and properly heat-treated, it will be welded together with an Austenitic stainless steel round rod which has a non-threaded bolt. And then the welded flush and shoulder will be cut so that a non-carburized hardened area in a proper width can be formed. Lastly it is threaded and quenched so as to manufacture a screw whose head and threaded stem joint are high corrosion-resistance and whose carburized drilling end portion has a high self-tapping and self-drilling function.

REFERENCES:
patent: 910434 (1909-01-01), Thompson
patent: 3853258 (1974-12-01), Louw et al.
patent: 3924508 (1975-12-01), De Caro
patent: 4279528 (1981-07-01), Mangiavacchi et al.

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