Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal
Patent
1989-01-23
1992-11-03
Sheehan, John P.
Metal treatment
Process of modifying or maintaining internal physical...
Heating or cooling of solid metal
148 28, 148 29, 148713, C21D 148
Patent
active
RE0341193
ABSTRACT:
A method of quenching metal components utilizing a water based quenching composition which includes a polyvinylpyrrolidone polymer of high molecular weight and in relatively high concentrations and thereafter power washing the parts to remove the polymeric film. Another preferred embodiment uses the same high molecular weight polyvinylpyrrolidone in combination with two rust inhibiting agents which greatly extend the time during which the quenchant film left on the quenched parts remains water soluable, while still providing an excellent approximation of the cooling curve characteristic of an oil quenchant.
REFERENCES:
patent: 3022205 (1962-02-01), Chase et al.
patent: 3902929 (1975-09-01), Meszaros
patent: 4087290 (1978-05-01), Kopietz et al.
patent: 4826545 (1989-05-01), Foreman et al.
Foreman Robert W.
Meszaros Anthony G.
Park Chemical Company
Sheehan John P.
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