Simulation and experimental study on carbide dissolution process of Fe-1C-1.42Cr-bearing steel

2019 ◽  
Vol 49 (1) ◽  
pp. 249-257
Author(s):  
Fuyong Su ◽  
Wenli Liu ◽  
Hui Wang ◽  
Zhi Wen
Keyword(s):  
Experimental Study ◽  
Bearing Steel ◽  
Dissolution Process ◽  
Carbide Dissolution

scholarly journals On the Spheroidized Carbide Dissolution and Elemental Partitioning in High Carbon Bearing Steel 100Cr6

2013 ◽  
Vol 45 (2) ◽  
pp. 595-606 ◽  
Author(s):  
Wenwen Song ◽  
Pyuck-Pa Choi ◽  
Gerhard Inden ◽  
Ulrich Prahl ◽  
Dierk Raabe ◽  
...  
Keyword(s):  
Bearing Steel ◽  
High Carbon ◽  
Carbide Dissolution

An Insight into the Effect of Deformation on Carbide Dissolution in the Band Structure of Bearing Steel

2013 ◽  
Vol 334-335 ◽  
pp. 171-176 ◽  
Author(s):  
Mitra Basirat ◽  
Hasse Fredriksson
Keyword(s):  
Band Structure ◽  
Volume Fraction ◽  
Testing Machine ◽  
Recovery Process ◽  
Hydraulic Testing ◽  
Bearing Steel ◽  
Dendritic Segregation ◽  
Compression Tests ◽  
Uphill Diffusion ◽  
Carbide Dissolution

Dendritic segregation in deformed samples remains in the form of band structure, which is a high-strained region. The present work investigates the effect of the uphill diffusion process, occurring during deformation, on the dissolution of carbide particles in the band structure. A series of hot compression tests are performed on the cast structure of bearing steel by using a hydraulic testing machine, MTS 810. Cylindrical specimens are deformed in a temperature range of 800°C to 900°C and at strain rates of 5s-1and 0.5s-1. In order to eliminate the recovery process, samples are immediately quenched after the compression. The microsegregation of Cr, Mo, Mn and Si are investigated in the band structure, which shows a tendency of uphill diffusion during deformation process. The results show that the volume fraction of carbides varies with the increased straining. The results also show that deformation causes the fragmentation, dispersion of pearlite in the dendrites and the dissolution of spheroidized carbides in the band structure.

Experimental Study on Tribological Properties of Graphite-MoS2 Coating on GCr15

2018 ◽  
Vol 140 (5) ◽  
Author(s):  
F. M. Meng ◽  
Z. T. Cui ◽  
Z. T. Cheng ◽  
H. L. Han
Keyword(s):  
Experimental Study ◽  
Coefficient Of Friction ◽  
Tribological Properties ◽  
Rotational Speed ◽  
Applied Load ◽  
Bearing Steel ◽  
Experimental Results ◽  
Gcr15 Bearing Steel ◽  
Mos2 Coating ◽  
Scar Width

The graphite-MoS2 coated on GCr15 bearing steel is prepared through air spraying and its tribological performances are investigated experimentally. Then its coefficient of friction (COF) and wear scar width (WSW) are investigated through the MFT-5000 multifunction tribometer and other test equipments. The experimental results show that the addition of the graphite can effectively decrease the COF and narrow the WSW of the MoS2. There exists a critical applied load for wearing out the surface with the graphite-MoS2 coating. Moreover, there exists an optimal rotational speed of 500 rpm to decrease the COF and WSW of the GCr15 steel.

Experimental study on the performance of a load-bearing steel stud gypsum board wall assembly exposed to a real fire

2011 ◽  
Vol 46 (8) ◽  
pp. 497-505 ◽  
Author(s):  
Seul-Hyun Park ◽  
Samuel L. Manzello ◽  
Matthew F. Bundy ◽  
Tensei Mizukami
Keyword(s):  
Experimental Study ◽  
Bearing Steel ◽  
Gypsum Board ◽  
Load Bearing ◽  
Wall Assembly ◽  
Steel Stud

scholarly journals The Effect of Soaking on Segregation and Primary-Carbide Dissolution in Ingot-Cast Bearing Steel

Metals ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 800 ◽  
Author(s):  
Fareed Khan
Keyword(s):  
Bearing Steel ◽  
Primary Carbide ◽  
Substitutional Solute ◽  
The Matrix ◽  
Matrix Region ◽  
Steel Grades ◽  
Carbide Dissolution ◽  
Bulk Matrix ◽  
Primary Carbides ◽  
Composition Pattern

In this work, segregation in the cast and hot worked structure, as well as the effects of soaking on macro and micro segregation, in hypereutectoid bearing steel produced by ingot casting were studied. Samples were selected from ingots that where either as cast or soaked for twenty hours. Two similar bearing steel grades were used for this investigation. For the as cast ingot, samples were selected from both A-segregation channel regions and the matrix region. Samples were also selected from hot-worked bars originating from ingots that had been soaked for four hours or twenty hours. Micro and macro examinations of the microstructures were conducted and compared. In addition, a segregation analysis of the substitutional solute elements was performed using EDX equipment mounted on a Scanning Electron Microscope (SEM). EMPA mapping of the composition pattern in the bulk, as well as the carbides, was conducted. Precipitation of M3C, M2C, and M6C was observed. The carbides at A-segregation channels were found to have a different morphology to those precipitated in the bulk matrix. After soaking at 1200 °C for 4 h, all the primary carbides are dissolved.

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