ISSN:
1573-8973
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Conclusions 1. Laser alloying of the structural steel 40KhN with chromium, nickel, or cobalt has the effect that a structure with different amounts of residual austenite (from 0 to 70% in dependence on the type of alloying element and the regime of laser treatment) forms in the surface layers up to 700 μm thick, this structure also contains martensite with different morphology and different types of carbide phase: Cr23C6 in alloying with chromium, and (Co, Fe)7C3 in alloying with cobalt. 2. By changing the phase composition and the morphology of the surface layers we can obtain both high-strength layers (with hardness greater than that of hardened steel) and tough layers. In dependence on the operating conditions of the parts (higher demands regarding wear resistance or resistance to cyclic impact loads), the sequence and thickness of the abovementioned layers can be changed by laser alloying.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00717463
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