Method for gas-and fluid-tight sealing of boreholes which are th

Details Method for gas-and fluid-tight sealing of boreholes which are th Method for gas-and fluid-tight sealing of boreholes which are th

1976-02-26

1977-10-04

Dean, R.

Metal treatment

Compositions

Heat treating

148 155, 148 165, 148 166, 148 18, 148 19, C21D 174, C21D 702

Patent

active

040522334

ABSTRACT:
A method of sealing non-threaded boreholes with a preferably spherical sealing member comprising pressing the sealing member into the borehole in an unhardened raw material hardenable by nitridation, wedging the lip of the borehole and hardening the material by nitridation at a temperature at which at least some of the initial stress generated by the pressing is retained.

REFERENCES:
patent: 1918895 (1933-07-01), Bersey et al.

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