Effect of heat treatment on microstructure and mechanical properties of high boron white cast iron

2010 ◽  
Vol 528 (2) ◽  
pp. 770-775 ◽  
Author(s):  
Xiang Chen ◽  
Yanxiang Li
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Cast Iron ◽  
White Cast Iron ◽  
Microstructure And Mechanical Properties ◽  
High Boron

Microstructure and mechanical properties of high boron white cast iron

2008 ◽  
Vol 486 (1-2) ◽  
pp. 112-116 ◽  
Author(s):  
Zhongli Liu ◽  
Yanxiang Li ◽  
Xiang Chen ◽  
Kaihua Hu
Keyword(s):  
Mechanical Properties ◽  
Cast Iron ◽  
White Cast Iron ◽  
Microstructure And Mechanical Properties ◽  
High Boron

The Effect of Modification and Heat Treatment on Low Chromium White Cast Iron

2011 ◽  
Vol 418-420 ◽  
pp. 1114-1117 ◽  
Author(s):  
E Liu ◽  
Feng Lan Wei ◽  
Li Chun Qiu
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Cast Iron ◽  
Impact Toughness ◽  
White Cast Iron ◽  
Microstructure And Mechanical Properties ◽  
Carbide Morphology ◽  
The Impact ◽  
Compound Modification

The effect of compound modification and various kinds of heat treatment on microstructure and mechanical properties of the low chromium white cast iron was studied.The results showed that,after modification,the carbide morphology in cast iron has been greatly improved;the annealed modified cast iron is suitable for machining;both martensitic quenching and austempering can cause the hardness and the impact toughness of modified cast iron increase greatly.

scholarly journals The Effect of Quenching and Partitioning (Q&P) Heat Treatment on the Microstructure and Mechanical Properties of High Boron Steel

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1556
Author(s):  
Zhao Li ◽  
Run Wu ◽  
Mingwei Li ◽  
Song-Sheng Zeng ◽  
Yu Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Volume Fraction ◽  
Martensitic Steel ◽  
Boron Steel ◽  
Quenching And Partitioning ◽  
Effect Mechanism ◽  
Microstructure And Mechanical Properties ◽  
High Boron ◽  
Cast Condition

High boron steel is prone to brittle failure due to the boride distributed in it with net-like or fishbone morphology, which limit its applications. The Quenching and Partitioning (Q&P) heat treatment is a promising process to produce martensitic steel with excellent mechanical properties, especially high toughness by increasing the volume fraction of retained austensite (RA) in the martensitic matrix. In this work, the Q&P heat treatment is used to improve the inherent defect of insufficient toughness of high boron steel, and the effect mechanism of this process on microstructure transformation and the change of mechanical properties of the steel has also been investigated. The high boron steel as-casted is composed of martensite, retained austensite (RA) and eutectic borides. A proper quenching and partitioning heat treatment leads to a significant change of the microstructure and mechanical properties of the steel. The net-like and fishbone-like boride is partially broken and spheroidized. The volume fraction of RA increases from 10% in the as-cast condition to 19%, and its morphology also changes from blocky to film-like. Although the macro-hardness has slightly reduced, the toughness is significantly increased up to 7.5 J·cm−2, and the wear resistance is also improved.

Effect of Boron and Heat Treatment on Mechanical Properties of White Cast Iron for Mining Application

2011 ◽  
Vol 18 (11) ◽  
pp. 31-39 ◽  
Author(s):  
Havva Kazdal Zeytin ◽  
Hakan Yildirim ◽  
Banu Berme ◽  
Selim Duduoĝlu ◽  
Gürkan Kazdal ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Cast Iron ◽  
White Cast Iron

Development and properties of austempered low alloyed white cast iron

2021 ◽  
Vol 63 (11) ◽  
pp. 977-983
Author(s):  
Mehmet Erdogan ◽  
Kemal Davut ◽  
Volkan Kilicli
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Cast Iron ◽  
Impact Toughness ◽  
White Cast Iron ◽  
Charpy Impact ◽  
Transformation Products ◽  
Xrd Analysis ◽  
Salt Bath ◽  
Electron Microscopes

Abstract This study examined the response of low-alloy white cast iron to austempering heat treatment. In addition, it investigated the microstructure and mechanical properties of austempered low-alloy white cast iron. The low-alloy white cast iron specimens were austenitized at 900 °C, followed by quick quenching into a salt bath at 375 °C, and held there for 15 to 120 minutes for austempering heat treatment. Microstructural features were studied by optical, scanning electron microscopes, and XRD analysis. The mechanical properties were determined by hardness and unnotched Charpy impact toughness tests. As a function of those austempering times, a microstructural map was constructed to show how the transformation products develop, quantitatively. The experimental results showed that the austempering heat treatment produced a microstructure consisting of eutectic carbides + ausferritic structure in low-alloy white cast iron. It can be concluded that the low-alloy white cast iron can be austempered, similar to ductile cast irons. Improved hardness and impact toughness values have been obtained in austempered low-alloy white cast iron.

Effect of Heat Treatment on Microstructure and Mechanical Properties of Cr31 Hypereutectic Cast Iron

2015 ◽  
Vol 740 ◽  
pp. 36-42
Author(s):  
Chuan Xiao Peng ◽  
Wen Chao Cui ◽  
Xiao Yan Yang ◽  
Li Wang
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Cast Iron ◽  
Retained Austenite ◽  
Wear Property ◽  
Erosion Wear ◽  
Microstructure And Mechanical Properties ◽  
Bulk Hardness ◽  
Chromium Cast Iron ◽  
Carbide Product

The effect of destabilization at (960°C,1000°C,1050°C) followed by sub-critical heat treatment (SCHT) at (260°C, 450°C, 550°C) on microstructure and mechanical properties of a hypereutectic chromium cast iron containing 31 wt.% Cr was investigated. The response of the microstructure of the specimens differed significantly to heat treatment. With increasing destabilization temperature, the amount of retained austenite increased and it became more stable during following SCHT. The peak values of bulk hardness deceased with increasing destabilization temperature, while higher SCHT was needed to reach the hardness maximum. The hardness and erosion wear property of the specimens destabilization at 960°C or 1000°C deteriorated after SCHT at 550°C due to the formation of ferrite/carbide product, which was not found in the specimens destabilization at 1050°C followed by SCHT at 550°C. The specimen destabilization at 960°C + SCHT at 260°C performed best erosion wear resistance with matrix of martensite containing little austenite.

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