scholarly journals Effect of molybdenum, vanadium, boron on mechanical properties of high chromium white cast iron in as-cast condition

2016 ◽  
Author(s):  
F. Nurjaman ◽  
S. Sumardi ◽  
A. Shofi ◽  
M. Aryati ◽  
B. Suharno
Keyword(s):  
Mechanical Properties ◽  
Cast Iron ◽  
White Cast Iron ◽  
High Chromium ◽  
Cast Condition

scholarly journals MICROSTRUCTURE AND PROPERTIES OF HIGH CHROMIUM WHITE CAST IRONS ALLOYED WITH BORON

2021 ◽  
Vol 3 ◽  
pp. 137-141
Author(s):  
Julieta Kaleicheva ◽  
Krasimir Kirov ◽  
Valentin Plamenov Mishev ◽  
Zdravka Karaguiozova
Keyword(s):  
Mechanical Properties ◽  
Cast Iron ◽  
Impact Toughness ◽  
Boron Content ◽  
Bending Strength ◽  
White Cast Iron ◽  
Metallographic Analysis ◽  
Cast Irons ◽  
High Chromium ◽  
The Impact

The microstructure and mechanical properties of high chromium white cast iron with composition: 2,6÷3,4% C; 0,9÷1,1% Si; 0,8÷1,1% Mn; 1,0÷1,3% Mo; 12,3÷13,4% Cr, additionally doped with boron in an amount of 0,18% to 1,25% is investigated. The microstructure of six compositions of white cast irons is studied by means of an optical metallographic analysis - one without boron, and the others contain 0,18%; 0,23%; 0,59%; 0,96% and 1,25% boron. A test is performed to determine: hardness by the Rockwell method; microhardness; bending strength and impact toughness. It was found that at a boron content of 0,18%; 0,23% and 0,59%, the structure of white cast irons is subeutectic, with impact toughness in the range of 1,80÷1,52 J/cm2; with a boron content of 0,96%, the structure of white cast iron is close to the eutectic, with impact toughness 0,98 J/cm2 ; at a boron content of 1,25% the structure of white cast iron is supereutectic and the impact toughness decreases to 0,68 J/cm2. With a change in the boron content from 0,8% to 1,25%, the amount of carbide phase in the structure of white cast iron increases, which leads to an increase in hardness from 53 to 59 HRC. The highest bending strength (Rmi=660,85 MPa) was obtained in white cast irons with a boron content of 0,23%. 

scholarly journals Microstructural evolution during austempering of a ASTM A-532 CLASS III type high chromium white cast iron undergoing abrasive wear

2017 ◽  
Vol 26 (46) ◽  
Author(s):  
Oscar Fabián Higuera-Cobos ◽  
Jeison Bucurú-Vasco ◽  
Andrés Felipe Loaiza-Patiño ◽  
Mónica Johanna Monsalve-Arias ◽  
Dairo Hernán Mesa-Grajales
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Cast Iron ◽  
Chemical Composition ◽  
Abrasive Wear ◽  
Retained Austenite ◽  
White Cast Iron ◽  
Abrasive Wear Resistance ◽  
Class Iii ◽  
High Chromium

This paper studies the influence of variables such as holding temperatures and times during austempering of High Chromium White Cast Iron (HCWCI), with the following chemical composition: Cr 25 %, C 3 %, Si 0.47 %, Mn 0.74 % and Mo 1.02 %. The aim of the austempering was to modify the percentage of retained austenite and its correlation to abrasive wear resistance under different conditions.Microhardness tests, SEM-EDS and XRD were performed to determine mechanical properties, chemical composition, and type of carbides and microstructures present, respectively. The tests complied with the ASTM G-65 standard. Results showed that the best performance against abrasion was achieved for austempering at 450 ºC with holding time of 6 hours.

scholarly journals Microstructure characterisation and mechanical properties of a functionally-graded NbC/high chromium white cast iron composite

2018 ◽  
Vol 136 ◽  
pp. 196-205 ◽  
Author(s):  
Wen Hao Kan ◽  
Carlos Albino ◽  
Daniel Dias-da-Costa ◽  
Kevin Dolman ◽  
Timothy Lucey ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Cast Iron ◽  
White Cast Iron ◽  
Functionally Graded ◽  
High Chromium

Effect of heat treatment on microstructure and mechanical properties of a Ti-bearing hypereutectic high chromium white cast iron

2008 ◽  
Vol 487 (1-2) ◽  
pp. 171-179 ◽  
Author(s):  
Xiaohui Zhi ◽  
Jiandong Xing ◽  
Yimin Gao ◽  
Hanguang Fu ◽  
Jiyun Peng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Cast Iron ◽  
White Cast Iron ◽  
High Chromium ◽  
Microstructure And Mechanical Properties

scholarly journals Equiaxed and Oriented Microstructure in High Chromium Cast Iron

2014 ◽  
Vol 59 (2) ◽  
pp. 723-726 ◽  
Author(s):  
D. Kopyciński ◽  
E. Guzik ◽  
A. Szczęsny
Keyword(s):  
Mechanical Properties ◽  
Cast Iron ◽  
White Cast Iron ◽  
Unidirectional Solidification ◽  
Steel Scrap ◽  
High Chromium ◽  
High Chromium Cast Iron ◽  
Fine Grain ◽  
Chromium Cast Iron ◽  
Cast Parts

Abstract It has been proved that an addition of boron carbide and shredded steel scrap introduced as an inoculants to the chromium white cast iron changes the microstructure of castings. The operation increases the number of crystallization nuclei of M7C3 carbides. In this case the B4C carbides act as substrates for the nucleation of M7C3 (chromium carbides). Castings after B4C inoculation have fine grain fracture surface. Primary precipitates of chromium carbide also appeared, lowering the mechanical properties of as-cast parts. Additionally, in order to increase the mechanical properties of chromium cast iron, unidirectional solidification was used. In this case, 0.3 wt. % cerium was used as inoculant.

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