Use of a pulsed electron beam for heat treatment of metals

An analytical model and the operational envelope are defined for electron beam heat treatment of alloy surfaces and illustrated with the results of trials with pulsed beam treatment of steel alloys. The average rate of cooling of the surface layer, which can be tens of microns thick and heated by di...

Full description

Saved in:
Bibliographic Details
Published in:Metal science and heat treatment 1985-03, Vol.26 (9-10), p.680
Main Authors: Gusev, O A, Lazarenko, A V, Ivanov, B A, Markov, V B, PECHERSKII, O P, CHEBUKOV, E S
Format: Article
Language:English
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:An analytical model and the operational envelope are defined for electron beam heat treatment of alloy surfaces and illustrated with the results of trials with pulsed beam treatment of steel alloys. The average rate of cooling of the surface layer, which can be tens of microns thick and heated by direct energy release from the electrons, provided the beam possesses sufficiently high energy, is formulated. The problem of heat conduction is avoided if the length of the current pulse is kept below a certain rate. The experiments examined the microhardness and thickness of the surface layers of the treated specimens, the latter value being no more than 40 microns. Significant increases in the surface hardness due to the beam treatment were attributed to a shift to an amorphous structure from a polycrystalline structure. The beam energy employed was 380 keV.
ISSN:0026-0673