Carbide Formation and Matrix Strengthening by Nb Addition in Austenitic Stainless Cast Steels Used for Turbo-Charger-Housing Materials

2019 ◽  
Vol 26 (10) ◽  
pp. 1506-1514
Author(s):  
Jisung Yoo ◽  
Won-Mi Choi ◽  
Byeong-Joo Lee ◽  
Gi-Yong Kim ◽  
Hyungjun Kim ◽  
...  
Keyword(s):  
Carbide Formation ◽  
Cast Steels ◽  
Turbo Charger ◽  
Housing Materials ◽  
Nb Addition

Replacement of Ni by Mn in High-Ni-Containing Austenitic Cast Steels used for Turbo-Charger Application

2016 ◽  
Vol 48 (2) ◽  
pp. 568-574 ◽  
Author(s):  
Seungmun Jung ◽  
Yong Hee Jo ◽  
Changwoo Jeon ◽  
Won-Mi Choi ◽  
Byeong-Joo Lee ◽  
...  
Keyword(s):  
Cast Steels ◽  
Turbo Charger

Microstructures and Thermostability of Spray Formed Nb-Containing High Speed Steel

2011 ◽  
Vol 418-420 ◽  
pp. 3-7
Author(s):  
Yi Peng Yu ◽  
Jin Feng Huang ◽  
Hua Cui ◽  
Yuan Hua Cai ◽  
Ji Shan Zhang
Keyword(s):  
Cooling Rate ◽  
High Speed ◽  
High Speed Steel ◽  
Spray Forming ◽  
Eutectic Carbide ◽  
Cast Steels ◽  
Primary Carbides ◽  
Equiaxed Grains ◽  
Nb Addition ◽  
Nb Additions

The M3 type high speed steel billets with / without Nb addition were prepared via spray forming. The effects of cooling rate and Nb on the microstructures and property of the M3 type high speed steel were investigated. The results show that the as-cast steels contain coarse primary dendrites and M2C eutectic carbide, but the equiaxed grains and fine carbides are formed in the spray-formed steels. It can be seen that carbide precipitation and grain growth were suppressed by high cooling rate. The Nb additions can change the types of primary carbides. The solidified carbide microstructure was effectively changed from M2C to M6C type during the cooling of hot spray-formed billet. Niobium improves the microstructural thermostability of the M3 type high speed steel during heat treatments.

Characterization of carbides in M50NiL

1991 ◽  
Vol 49 ◽  
pp. 606-607
Author(s):  
L. S. Lin ◽  
K. P. Gumz ◽  
A. V. Karg ◽  
C. C. Law
Keyword(s):  
Temperature Effects ◽  
Base Composition ◽  
Lattice Parameter ◽  
Control Surface ◽  
Carbide Formation ◽  
Particle Sizes ◽  
Low Carbon ◽  
Fee Structure ◽  
Heat Treated

Carbon and temperature effects on carbide formation in the carburized zone of M50NiL are of great importance because they can be used to control surface properties of bearings. A series of homogeneous alloys (with M50NiL as base composition) containing various levels of carbon in the range of 0.15% to 1.5% (in wt.%) and heat treated at temperatures between 650°C to 1100°C were selected for characterizations. Eleven samples were chosen for carbide characterization and chemical analysis and their identifications are listed in Table 1.Five different carbides consisting of M6C, M2C, M7C3 and M23C6 were found in all eleven samples examined as shown in Table 1. M6C carbides (with least carbon) were found to be the major carbide in low carbon alloys (<0.3% C) and their amounts decreased as the carbon content increased. In sample C (0.3% C), most particles (95%) encountered were M6C carbide with a particle sizes range between 0.05 to 0.25 um. The M6C carbide are enriched in both Mo and Fe and have a fee structure with lattice parameter a=1.105 nm (Figure 1).

Carbide formation during laser welding of SiC/aluminum composites

1993 ◽  
Author(s):  
Santosh Gopinathan ◽  
Narendra B. Dahotre ◽  
Mary Helen McCay ◽  
T. Dwayne McCay
Keyword(s):  
Laser Welding ◽  
Carbide Formation ◽  
Aluminum Composites
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