Measuring the surface-layer temperature of rolling-mill rolls

1969 ◽  
Vol 12 (11) ◽  
pp. 1575-1576
Author(s):  
A. A. Zgura ◽  
V. F. Frolov ◽  
N. N. Oksamitnyi
Keyword(s):  
Surface Layer ◽  
Rolling Mill ◽  
Surface Layer Temperature

scholarly journals Surface layer temperature inversion in the Bay of Bengal: Main characteristics and related mechanisms

2016 ◽  
Vol 121 (8) ◽  
pp. 5682-5696 ◽  
Author(s):  
Pankajakshan Thadathil ◽  
I. Suresh ◽  
S. Gautham ◽  
S. Prasanna Kumar ◽  
Matthieu Lengaigne ◽  
...  
Keyword(s):  
Surface Layer ◽  
Bay Of Bengal ◽  
Temperature Inversion ◽  
Surface Layer Temperature

OUTLOOKS IN SURFACE PLASTIC DEFORMATION USE TO DECREASE SURFACE ROUGHNESS IN ROLLING MILL PARTS STRENGTHENED WITH SVS-ELECTRODE MATERIALS

2020 ◽  
Vol 2020 (8) ◽  
pp. 4-12
Author(s):  
Aleksey Makarov ◽  
Anna Titova ◽  
A. Afonin ◽  
Alexander Kudryashov ◽  
Aleksandr Vladimirov
Keyword(s):  
Surface Roughness ◽  
Plastic Deformation ◽  
Surface Layer ◽  
Rolling Mill ◽  
Mechanical Characteristics ◽  
Electrode Materials ◽  
Surface Plastic Deformation ◽  
Surface Plastic ◽  
Electrospark Alloying ◽  
Micro Hardness

The purpose of this work consists in ensuring the required quality of micro-geometry and mechanical characteristics of a surface layer in rolling mill parts, in particular, surface roughness no more than Ra=2.5mkm and micro-hardness no less than 900 kgs/mm2. To ensure such micro-hardness in samples of 60HN steel there were applied coatings With the method of electrospark alloying with the use as an electrode synthetic hard tool materials based on titanium diboride (STIM-11) and titanium carbide (STIM-40NA) made by the method of self-propagating high-temperature synthesis. EIL-coatings made of thses materials are characterized with the thickness of 30mkm, micro-hardness up to 980 kgs/mm2, that exceeds four times micro-hardness of a non-hardened sample, and with roughness Ra=5…10mkm. To decrease roughness of EIL-coatings made of STIM materials for the first time there was used surface plastic deformation with smoothing that is a novelty of this investigation. Smoothing was carried out on a screw-cutting lathe with the aid of a flattener with TC6 tungsten-cobalt hard alloy indenter (r=6mm) at the rotational frequency n=70rev/min and at the indenter longitudinal feed S=0.05mm/rev and the smoothing force P=500N. As a result of smoothing the micro-hardness of surface layers made 990kgs/mm2, and roughness – Ra=1.6…1.8mkm. Conclusion: smoothing contributes to the decrease of surface layer roughness from 3 times (STIM-40NA) to 5.5 times (STIM-11) at the conservation of their mechanical characteristics that proves the outlook in use of such a technology for finishing parts surfaces strengthened with SVS-electrode materials by STIM method of electrospark alloying.

Surface layer temperature inversion in the Arabian Sea during winter

1992 ◽  
Vol 48 (3) ◽  
pp. 293-304 ◽  
Author(s):  
Pakajakshan Thadathil ◽  
Aravind K. Gosh
Keyword(s):  
Surface Layer ◽  
Arabian Sea ◽  
Temperature Inversion ◽  
Surface Layer Temperature

Modeling and Experimental Investigations of the Surface Layer Temperature of Titanium Alloys during AEDG Processing

2015 ◽  
Vol 365 ◽  
pp. 63-70 ◽  
Author(s):  
Andrzej Golabczak ◽  
Marcin Golabczak ◽  
Andrzej Konstantynowicz ◽  
Robert Swiecik ◽  
Marcin Galant
Keyword(s):  
Surface Layer ◽  
Titanium Alloys ◽  
Experimental Investigations ◽  
Energetic Efficiency ◽  
Internal Stresses ◽  
Grinding Wheel ◽  
Manufacturing Processes ◽  
Conventional Grinding ◽  
Titanium Alloy Ti6al4v ◽  
Surface Layer Temperature

Observing the latest manufacturing processes, the following tendencies can be noted: the gain of the energetic efficiency and shortening of the processing time with parallel preservation of the dimensions tolerance, shape tolerance and outer layer quality of the processed workpiece. Also the possibilities of gaining efficiency by rising criteria for process parameters are limited. It is mainly observed in the processing of hard machinable materials like titanium alloys or sintered carbides. Problems related to poor machinability were revealed during the final manufacturing processes using abrasive grinding [1,2]. In this work the results which have been presented are related to the influence by selected electrical parameters of the Abrasive Electrodischarge Grinding (AEDG) on the surface layer temperature of machined samples, in comparison to conventional grinding. Also the change in temperature during the AEDG has been depicted. The basis of this work is similar to the investigations of the deep grinding of surfaces of the titanium alloy Ti6Al4V using CBN and a diamond grinding wheel. For the comparative evaluation of the conventional grinding and AEDG, measurements of the specific grinding energy, energy of the spark discharge and internal stresses in the surface layer have been used.

Surface layer temperature inversion in the Bay of Bengal

2002 ◽  
Vol 49 (10) ◽  
pp. 1801-1818 ◽  
Author(s):  
Pankajakshan Thadathil ◽  
V.V Gopalakrishna ◽  
P.M Muraleedharan ◽  
G.V Reddy ◽  
Nilesh Araligidad ◽  
...  
Keyword(s):  
Surface Layer ◽  
Bay Of Bengal ◽  
Temperature Inversion ◽  
Surface Layer Temperature

scholarly journals Zooplankton diversity and distribution in a deep and anoxic Mediterranean coastal lake

2013 ◽  
Vol 14 (1) ◽  
pp. 179 ◽  
Author(s):  
G. KEHAYIAS ◽  
A. RAMFOS ◽  
S. IOANNOU ◽  
P. BISOUKI ◽  
E. KYRTZOGLOU ◽  
...  
Keyword(s):  
Surface Layer ◽  
Size Fraction ◽  
Oxygen Depletion ◽  
Seasonal Cycles ◽  
Zooplankton Abundance ◽  
Calanoid Copepods ◽  
Coastal Lake ◽  
The Vertical Distribution ◽  
Western Greece ◽  
Surface Layer Temperature

The variation of the smaller size fraction of zooplankton was investigated during a two-year period in a brackish deep and anoxic coastal lake of western Greece (Aitoliko), along with the specific environmental characteristics of this ecosystem. The zooplanktonic community comprised a relatively small number of taxa and it was dominated by brackish-water calanoid copepods (Paracartia latisetosa, Calanipeda aquaedulcis) and in certain periods by rotifers and tintinnids. The zooplankton abundance showed an increase in the warmer period starting from late spring and reached maximum values in July. In the well oxygenated surface layer, temperature was the most important parameter influencing the seasonal cycles of all groups. In contrast, the oxygen depletion a few meters under the surface affected the vertical distribution of most of the zooplankton groups, which were found restricted in the surface layer especially from spring until autumn. Only the meroplanktonic larvae of polychaetes presented increased proportions in the deeper layers. Salinity has not significantly influenced the zooplanktonic assemblages. The results point out the degraded status of the Aitoliko basin where the hypoxic/anoxic layers resulted to a high portion of dead organic material identified as copepod carcasses, and underlines the necessity of monitoring of this ecosystem.

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