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. Molybdenum was hot-rolled in vacuum of 5·10−5 mm Hg (1500–1000°C, six passes with ε=25%) under conditions of direct contact with the surface of the rolls (with no intermediate oxide layer). We found adhesion of the rolled metal to the rolls and surface defects in the form of a network of heat checks (chromium cast iron) or separate cracks (KhV die steel, ShKhMF ball bearing steel). 2. During hot rolling of molybdenum in vacuum of 5·10−5 mm Hg the temperature at the surface of the rolls reaches 600–700°C, the hardness of the surface layer (40 μ deep) is reduced by 70–150 HV units, and the surface layer acquires a troostite-sorbite structure. 3. Of the rolls tested, the best for hot rolling of refractory metals in vacuum are those of KhNVMF steel.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00657597
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