Study and Researches about the Microhardness’s Variation of a Special S.G. Cast Iron

Comparative cutting performance tests of two ceramic tools in machining cast iron, AISI-4340, H-11 steel were made, and the wear patterns, wear rates, and tool life data are analyzed to evaluate the performance characteristics of ceramic tools in comparison with that of carbide tools. Also the wear process and mechanism of ceramic tools are investigated by scanning electron microscope techniques and electron microprobe analyses. Some specific causes and mechanism of tool wear are evaluated in relation to the cutting performance data.

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Tribological Properties of Mo/NiCrBSi Thermal Spray Deposits

Thermal Spray 1998: Proceedings from the International Thermal Spray Conference ◽

10.31399/asm.cp.itsc1998p0237 ◽

1998 ◽

Author(s):

V. Fervel ◽

B. Normand ◽

C. Coddet ◽

M. Delaet

Keyword(s):

Cast Iron ◽

Adhesive Wear ◽

Tribological Behavior ◽

Optical Microscope ◽

Atmospheric Plasma ◽

Wear Process ◽

Dry Conditions ◽

Nicrbsi Coating ◽

The Difference ◽

Nicrbsi Coatings

Abstract The tribological behavior of Mo/NiCrBSi coatings obtained by atmospheric plasma spray was studied under dry conditions using an Amsler machine. Discussion is made on the effects of the plasma gas mixture and of the preheating of the substrate. The wear process of Mo/NiCrBSi in situation of dry rolling-sliding contact versus cast iron was observed using a profilometer, an optical microscope, and a scanning electron microscope. It was found that the wear mechanism could be divided into two steps : the first one corresponds to an abrasive wear; it results from the difference in hardness between the counter-specimen and the Mo/NiCrBSi coating. The second one corresponds to an adhesive wear resulting from the transfer of cast iron from the counter-specimen to the coating.

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Effect of Carbide Orientation on Sliding Wear Behaviour of High Chromium Cast Iron

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1136.567 ◽

2016 ◽

Vol 1136 ◽

pp. 567-572

Author(s):

Zheng Yi Jiang ◽

Xing Jian Gao ◽

Dong Bin Wei ◽

Sheng Li Li ◽

Hong Mei Zhang ◽

...

Keyword(s):

Cast Iron ◽

Wear Surface ◽

Sliding Wear ◽

Volume Fraction ◽

Wear Behaviour ◽

Dry Sliding Wear ◽

High Chromium ◽

High Chromium Cast Iron ◽

Chromium Cast Iron ◽

Sliding Wear Behaviour

The effect of carbide orientation on the dry sliding wear behaviour of high chromium cast iron was studied by pin-on-disc type wear tests at room temperature. The carbide anisotropy was achieved by thermomechanical treatments at temperatures of 950 and 1150 °C. By cladding with low carbon steel, the brittle high chromium cast iron was hot compressed severely with crack free. The thermomechanical treatments not only change the carbide orientation, but also increase the volume fraction of carbides. Due to the long axis of carbide rods is parallel to the wear surface, the high chromium cast iron treated at 1150 °C has a superior wear resistance than the as-cast one, in which the long axis of carbides is perpendicular to the wear surface. For the high chromium cast iron treated at 950 °C, high volume fraction of carbide pits accelerates the wear rate significantly even though it has a similar carbide orientation as the sample treated at 1150 °C. The observations on wear tracks reveal that the ferrous matrix can be protected better from abrasion when the high chromium cast iron was treated at 1150 °C.

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Effect of interaction between cementite and pearlite on two-body abrasive wear behaviors in white cast iron

Friction ◽

10.1007/s40544-020-0415-y ◽

2020 ◽

Author(s):

Baochao Zheng ◽

Wei Li ◽

Xiaohui Tu ◽

Jiandong Xing ◽

Suocheng Song

Keyword(s):

Wear Resistance ◽

Cast Iron ◽

Abrasive Wear ◽

White Cast Iron ◽

Wear Behavior ◽

Interaction Mechanism ◽

Wear Test ◽

Wear Process ◽

Cr Content ◽

Contact Loads

AbstractThe wear interaction of cementite and pearlite in the white cast iron (WCI) was investigated using the two-body abrasive wear test under contact loads of 20, 35, and 50 N. The wear behavior, wear surface morphology, sub-surface structure, and wear resistance were evaluated using X-ray diffraction, microhardness testing, and nano-indentation. The results indicated that when the Cr content was increased from 0 to 4 wt%, there was a significant increase in the microhardness (H) and elasticity modulus (E) of the cementite. This yielded a 15.91%- and 23.6%-reduction in the degree of wear resistance and surface roughness, respectively. Moreover, no spalling and breaking of cementite was observed with increasing Cr content during the wear process, indicating improved wear resistance of the bulk cementite. In addition, the hard phase (cementite) and tough matrix (pearlite) composite structure exhibited a good protective and supporting effect. Thus, it was concluded that the interaction mechanism of the wear phase contributed to the reduction of the wear weight loss of the composite during the wear process. The contribution of the interaction between the hard wear-resistant phase and the tough phase in WCI to the wear resistance decreased with increasing hardness of the pearlite matrix.

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Evaluation of the Wear Process of Cast Iron Coated with Manganese Phosphate

Tribology Transactions ◽

10.1080/10402000308982605 ◽

2003 ◽

Vol 46 (1) ◽

pp. 95-100 ◽

Cited By ~ 11

Author(s):

Tomonaga Oyamada ◽

Youichi Inoue

Keyword(s):

Cast Iron ◽

Wear Process ◽

Manganese Phosphate

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Effect of Impact Angle on Erosion Wear Behaviours of SiCp/Cast Iron Surface Composite

Materials Science Forum ◽

10.4028/www.scientific.net/msf.724.339 ◽

2012 ◽

Vol 724 ◽

pp. 339-342 ◽

Cited By ~ 2

Author(s):

Zhen Lin Lu ◽

Han Jin ◽

Yong Xin Zhou ◽

Hui Xie

Keyword(s):

Cast Iron ◽

Wear Rate ◽

Impact Angle ◽

Iron Surface ◽

Erosion Wear ◽

Slurry Erosion ◽

Wear Process ◽

Surface Composite ◽

Molten Cast Iron ◽

The Impact

The slurry erosion wear performances of the SiCp/cast iron surface composite, which was prepared by infiltrating molten cast iron into SiC particles preforms, were studied on self-made slurry inject erosion wear machine. The results show that the erosion wear rate of the SiCp/cast iron surface composite would be the lowest at impact angle of 30°, and the largest at impact angle of 60°. The erosion wear rate increases gradually when impact angle is changed from 30° to 60°, and then decreased with increasing the impact angle. The erosion wear mechanism of the SiCp/cast iron surface composite is dominated by cutting and grooving at low impact angle, and by fatigue spalling and cutting at high impact angle. For the gray cast iron, the erosion wear rate of would be increased gradually with the increase of impact angle, reaching the peak value at 90°, which indicates the typical characteristics of brittle material in slurry erosion wear process.

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Dry Sliding Wear of As-Cast and Thermomechanically Processed Low Chromium White Cast Iron

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.797.725 ◽

2013 ◽

Vol 797 ◽

pp. 725-730

Author(s):

Xing Jian Gao ◽

Qi Zhang ◽

Dong Bin Wei ◽

Si Hai Jiao ◽

Zheng Yi Jiang

Keyword(s):

Wear Resistance ◽

Cast Iron ◽

Thermomechanical Treatment ◽

Sliding Wear ◽

White Cast Iron ◽

Wear Behavior ◽

Dry Sliding Wear ◽

Dry Sliding ◽

Low Carbon ◽

Wear Process

This investigation attempts to improve the wear resistance of low chromium white cast iron (LCCI) by thermomechanical treatment. The thermomechanical treatment of the brittle LCCI with crack-free was successfully carried out by bonding it with a ductile low carbon steel firstly. Afterwards the dry sliding wear behavior of as-cast (LCCI-A) and thermomechanically processed (LCCI-B) samples was studied using a pin-on-disc apparatus under different test conditions. The microstructural examination shows that the refined supercooled austenite and plenty of secondary carbides in LCCI-B replaced the original microstructure of martensite and retained austenite with network carbide in LCCI-A. This significant evolution is beneficial to form and stabilise the oxide layer on the substrate, which makes the oxidational wear rather than abrasive wear or delamination dominating the wear process so that the improvement of the wear resistance of LCCI was achieved by hot working.

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Microstructure and Wear Resistance of WC and High Chromium Cast Iron Hardfacing Layers

Coatings ◽

10.3390/coatings10090852 ◽

2020 ◽

Vol 10 (9) ◽

pp. 852

Author(s):

Runnan Jia ◽

Shenglin Liu ◽

Zhichao Luo ◽

Jiapei Ning ◽

Haiyan Wang ◽

...

Keyword(s):

Wear Resistance ◽

Cast Iron ◽

High Temperature ◽

Abrasive Wear ◽

Low Carbon Steel ◽

Low Carbon ◽

High Chromium ◽

Wear Process ◽

High Chromium Cast Iron ◽

Chromium Cast Iron

The WC and high chromium cast iron (HCCI) welded layers were prepared on Q235 low carbon steel by hardfacing technique in order to improve high-temperature performance. The microstructure and mechanical properties of the welded layer were investigated. It was found that Fe3W3C is the major strengthening phase of the WC welded layer. Furthermore, a high-temperature three-body abrasive wear experiment was designed and conducted on the welded layers. The results show that the wear resistance of the WC welded layer was much better than that of the HCCI welded layer at both room and high temperatures. During the high-temperature abrasive wear process, the Fe3W3C phase can effectively strengthen the matrix and hence, contribute to improved wear resistance.

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