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Title:
THERMITE METHOD FOR STEEL MELT FOR THERMIT WELDING OF WORK
Document Type and Number:
Japanese Patent JPH09192855
Kind Code:
A
Abstract:

To secure high reliability and safety of the welding by performing the thermite reaction in a crucible made of α-Al2O3 of the prescribed density and bulk density.

The thermite reaction is performed in a crucible made of α-Al2O3 of porous or hollow spherical shape. α-Al2O3 is 0.8-3.0g/cm3 in density and 0.3-1.8g/cm3 in bulk density. More preferably, the reaction is performed in the crucible of 1.0-2.0g/cm3 in density and 0.4-1.4 g/cm3 in bulk density. For this purpose, e.g. the porous corundum which is manufactured by melting the calcinated alumina and blowing air into the melt is preferable. Workers can be protected thereby.


Inventors:
HORUSUTO ETSUGERUTO
MIHIYAERU SHIYUTAINHORUSUTO
Application Number:
JP33404896A
Publication Date:
July 29, 1997
Filing Date:
December 13, 1996
Export Citation:
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Assignee:
ELEKTRO THERMIT GMBH
International Classes:
B23K23/00; C22B5/04; (IPC1-7): B23K23/00
Attorney, Agent or Firm:
Toshio Yano (2 outside)