Shallow Cryogenic Treatment (SCT) Effects on the Mechanical Properties of High Cr Cast Iron: Low-Carbon Cast Steel Bimetallic Casting

2020 ◽  
Author(s):  
Zafer Özdemir
Keyword(s):  
Mechanical Properties ◽  
Cast Iron ◽  
Cryogenic Treatment ◽  
Cast Steel ◽  
Low Carbon ◽  
Shallow Cryogenic Treatment

The Effect of Sub-Zero Treatment on Mechanical Properties of GTAW Welded AA6082

2016 ◽  
Vol 852 ◽  
pp. 349-354 ◽  
Author(s):  
R. Devanathan ◽  
Sanjivi Arul ◽  
T. Venkatamuni ◽  
D. Yuvarajan ◽  
D. Christopher Selvam
Keyword(s):  
Mechanical Properties ◽  
Arc Welding ◽  
Artificial Aging ◽  
Cryogenic Treatment ◽  
Welding Process ◽  
Travel Speed ◽  
Treatment Result ◽  
Gas Tungsten Arc ◽  
Shallow Cryogenic Treatment ◽  
Hardness Values

The consequence of sub-zero treatment on the mechanical properties of welded AA6082-T6 by Gas Tungsten Arc Welding (GTAW) which in turn softens the heat concentrated welded region owing to dissolution of the strengthening precipitates. The sub-zero i.e. Shallow Cryogenic Treatment (SCT) is carried out on GTAW welded plate having a thickness of 6 mm at -77°C by varying the electrode travel speed and sub-zero treatment periods. Welded region of AA6082 were tested for hardness and microstructure by adapting three different conditions such as welded, post weld artificial aging with and without sub-zero treatment. Result revealed that the amount of softening in the welded region is indirectly proportional to electrode travel speed during welding process. It is also observed that the post weld SCT with artificial aging has increased the micro hardness values on the welded region as a consequence of the reactivation in the sequence of precipitation.

scholarly journals Enhancing mechanical properties of a low-carbon microalloyed cast steel by controlled heat treatment

2013 ◽  
Vol 559 ◽  
pp. 427-435 ◽  
Author(s):  
Jingwei Zhao ◽  
Jeong Hun Lee ◽  
Yong Woo Kim ◽  
Zhengyi Jiang ◽  
Chong Soo Lee
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Cast Steel ◽  
Low Carbon ◽  
Carbon Microalloyed

scholarly journals Alloyed White Cast Iron with Precipitates of Spheroidal Vanadium Carbides VC

2012 ◽  
Vol 12 (4) ◽  
pp. 95-100 ◽  
Author(s):  
M. Kawalec ◽  
M. Górny
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Cast Iron ◽  
Master Alloy ◽  
Eutectic Composition ◽  
White Cast Iron ◽  
Base Alloy ◽  
Cast Steel ◽  
Abrasive Wear Resistance ◽  
Vanadium Carbides

Abstract The paper presents the results of tests on the spheroidising treatment of vanadium carbides VC done with magnesium master alloy and mischmetal. It has been proved that the introduction of magnesium master alloy to an Fe-C-V system of eutectic composition made 34% of carbides crystallise in the form of spheroids. Adding mischmetal to the base alloy melt caused 28% of the vanadium carbides crystallise as dendrites. In base alloy without the microstructure-modifying additives, vanadium carbides crystallised in the form of a branched fibrous eutectic skeleton. Testing of mechanical properties has proved that the spheroidising treatment of VC carbides in high-vanadium cast iron increases the tensile strength by about 60% and elongation 14 - 21 times, depending on the type of the spheroidising agent used. Tribological studies have shown that high-vanadium cast iron with eutectic, dendritic and spheroidal carbides has the abrasive wear resistance more than twice as high as the abrasion-resistant cast steel.

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