PRODUCTION OF HIGH-STRENGTH INVARS ALLOYED WITH NITROGEN

Precision alloys with special physical properties such as low thermal expansion coefficient (Invars), low temperature dependence of elastic modulus (elinvars), etc. are widely applied in metrology, cryogenic fa cilities, precise machine building, and instrument making. Some areas of application call for not only certain levels of special properties but also high mechanical properties of these alloys. This work is devo ted to the development of high-strength Invars having minimal thermal expansion coefficient. A method of gasothermochemical treatment was us ed for this aim.