scholarly journals Influence of alloying elements and heat treatment on the mechanical properties of chromium cast iron

2020 ◽  
pp. 36-40
Author(s):  
E. I. Marukovich ◽  
V. M. Ilyushenko ◽  
V. A. Pumpur ◽  
V. M. Andrienko ◽  
P. Yu Duvalov
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Cast Iron ◽  
Bending Strength ◽  
Experimental Studies ◽  
Alloying Elements ◽  
High Chromium Cast Iron ◽  
Approximate Composition ◽  
Chromium Cast Iron ◽  
Strength In Bending

The results of experimental studies to determine the effect of alloying and heat treatment on the mechanical properties of the high-chromium cast iron are described. When alloying the melt with nickel, molybdenum and manganese, as well as during heat treatment by quenching, specific wear, tensile strength in bending of the obtained samples, their hardness and microhardness were studied. A comparative analysis of the influence of alloying elements and heat treatment methods has been performed. When alloying Ni, Mo, and Mn, cast specimens that have not undergone heat treatment have the highest specific wear. It was established that the hardened Ni alloyed samples have the greatest bending strength. It was found that cast samples that were not subjected to heat treatment have much lower hardness and microhardness. The approximate composition of chromium cast iron was determined for further studies to increase its wear resistance. The research results are used in the manufacturing process of parts for crushing and grinding equipment.

Effects of Vanadium and Rare-Earth on Carbides and Properties of High Chromium Cast Iron

2008 ◽  
Vol 575-578 ◽  
pp. 1414-1419 ◽  
Author(s):  
Wen Min Zhao ◽  
Zhen Xu Liu ◽  
Zi Lai Ju ◽  
Bo Liao ◽  
Xue Guang Chen
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Rare Earth ◽  
Cast Iron ◽  
Treatment Technology ◽  
High Chromium ◽  
Shape Distribution ◽  
High Chromium Cast Iron ◽  
Heat Treatment Technology ◽  
Chromium Cast Iron

The type, shape and distribution of carbide take directly effect on the mechanical properties of high chromium castings. Vanadium is able to stabilize the structure of carbide in high chromium cast iron, meanwhile the hardness of carbide containing vanadium can reaches about 2800HV. In some cases, vanadium can also refine the microstructure. Rare-earth is able to change the shape of carbide in cast iron, refine the grain size of ferrite and improve the mechanical properties of castings. In this experiment, intention of adding vanadium and rare-earth is modification of mechanical properties with the proper heat treatment technology. With the help of SEM, the characteristics of carbide, such as shape, distribution and quantity can be observed and mechanical properties have been improved for better wear-resistance.

scholarly journals Effect of Heat Treatment on Microstructure and Mechanical Properties of Ti-alloyed Hypereutectic High Chromium Cast Iron

2012 ◽  
Vol 52 (12) ◽  
pp. 2288-2294 ◽  
Author(s):  
Qiang Liu ◽  
Peter Hedstr^|^ouml;m ◽  
Hongwei Zhang ◽  
Qiang Wang ◽  
P^|^auml;r G. J^|^ouml;nsson ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Cast Iron ◽  
High Chromium ◽  
High Chromium Cast Iron ◽  
Microstructure And Mechanical Properties ◽  
Chromium Cast Iron

scholarly journals Sintering Preparation of 15 wt% Cr Cast Iron as well as Its Mechanical Properties and Impact Abrasive Wear

2020 ◽  
Author(s):  
Liyang Xiao ◽  
Pingan Xiao ◽  
Liviu Brândușan ◽  
Jinghong Gu ◽  
Zhongtao Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Cast Iron ◽  
Impact Toughness ◽  
Abrasive Wear ◽  
Bending Strength ◽  
Sintering Temperature ◽  
High Chromium ◽  
High Chromium Cast Iron ◽  
Chromium Cast Iron

15 wt% Cr sintered High Chromium Cast Iron (HCCI) with full density was successfully prepared by Super-solidus Liquid Phase Sintering (SPLS) technique, with water atomized 15 wt% Cr high chromium cast iron powder as initial materials. Its densification behavior and microstructure evolution in SPLS process and mechanical properties were investigated systematically. Additionally, the impact abrasive wear resistance under different impact energies were also analyzed and compared with another sintered HCCI with 20 wt% Cr. The results indicated that sintering temperature has a strong influence on the sintered alloy’s density, hardness, impact toughness and bending strength. The M7C3 type (M is Cr and Fe) carbides were obviously coarsened as temperature increased and their rod-shaped branches were fully developed at the same time, thereby resulting in carbide network formation in the matrix. The reasonable sintering temperature range was 1195–1205 °C, and the optimum mechanical properties had the hardness of 63.9 HRC, bending strength of 2112.65 MPa and impact toughness of 7.92 J/cm2. What is more important impact abrasive wear test results indicated 15 wt% Cr sintered HCCI’s wear resistance could be comparable to 20 wt% Cr sintered HCCI under impact energy 1~3 J/cm2, and it is more cost effective.

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