Influence of Work Media on Surface Property of Compacted Graphite Cast Iron Processed by Laser Local Processing

2015 ◽  
Vol 817 ◽  
pp. 385-391
Author(s):  
Yan Liu ◽  
Hong Zhou ◽  
Jing Yan Cheng ◽  
Chun Yan Yang ◽  
Peng Zhang
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
Surface Property ◽  
Laser Processing ◽  
Smooth Surface ◽  
Local Processing ◽  
Thermal Crack ◽  
Micro Hardness ◽  
Compacted Graphite ◽  
Graphite Cast Iron

In order to enhance surface property of brake materials, compacted graphite cast iron (CGI) with non-smooth surface was processed by laser local processing. This study focuses on the influence of the work media on wear resistance and thermal fatigue resistance of specimens. The results showed that when the work media were air and water respectively, laser local processing could enhance surface property of CGI. Changing work media could not change phase compositions of the laser processing area, but refined their microstructures, which enhanced their micro-hardness. By this way, the specimens’ wear resistance and resistance to thermal crack initiation were further improved, while their resistance to thermal crack propagation was influenced by cracks on bionic units.

scholarly journals Extrema of micro-hardness in fully pearlitic compacted graphite cast iron

2020 ◽  
Vol 33 (4-5) ◽  
pp. 218-225
Author(s):  
Jacques Lacaze ◽  
Charbel Moussa ◽  
Yannick Thebault ◽  
Wilson Guesser
Keyword(s):  
Cast Iron ◽  
Micro Hardness ◽  
Compacted Graphite ◽  
Graphite Cast Iron

On Wear Resistance of Laser-Treated Striated Non-Smooth Surface of Nodular Cast Iron

2014 ◽  
Vol 881-883 ◽  
pp. 1268-1270
Author(s):  
Zhe Ming
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
Laser Processing ◽  
Smooth Surface ◽  
Nodular Cast Iron ◽  
Processing Technology ◽  
Optimal Conditions ◽  
Single Factor

This paper presents a conclusion drawn by adopting laser processing technology to form striated non-smooth surface of nodular cast iron and study the factors that affect the wear resistance at the normal temperature by means of single factor testing and orthogonal testing. It shows that the optimal conditions of wear resistance are 3-min (wear period),0.98mm (grid space), and 200 r·min-1 (otary velocity).

Thermal Conductivity Analysis of Compacted Graphite Cast Iron After a Creep Test

2019 ◽  
Vol 50 (8) ◽  
pp. 3697-3704
Author(s):  
Wu Yue ◽  
Li Jianping ◽  
Yang Zhong ◽  
Guo Yongchun ◽  
Ma Zhijun ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Cast Iron ◽  
Creep Test ◽  
Compacted Graphite ◽  
Graphite Cast Iron

scholarly journals On the Primary Solidification of Compacted Graphite Iron: Microstructure Evolution during Isothermal Coarsening

2018 ◽  
Vol 925 ◽  
pp. 90-97 ◽  
Author(s):  
Juan Carlos Hernando ◽  
Attila Diószegi
Keyword(s):  
Cast Iron ◽  
Morphological Evolution ◽  
Solidification Process ◽  
Primary Phase ◽  
Eutectic Solidification ◽  
Spheroidal Graphite ◽  
Cube Root ◽  
Compacted Graphite ◽  
Primary Austenite ◽  
Graphite Cast Iron

It is widely accepted that in most commercial hypoeutectic alloys, both static mechanical properties and feeding characteristics during solidification, are extremely linked to the coarseness of the primary phase. It is therefore of critical importance to provide tools to control and predict the coarsening process of the dendritic phase present in hypoeutectic melts. The characterization of the primary phase, a product of the primary solidification, has traditionally been neglected when compared to the eutectic solidification characterization in cast iron investigations. This work presents the morphological evolution of the primary austenite present in a hypoeutectic compacted graphite cast iron (CGI) under isothermal conditions. To that purpose, a base spheroidal graphite cast iron (SGI) material with high Mg content is re-melted in a controlled atmosphere and reversed into a CGI melt by controlling the Mg fading. An experimental isothermal profile is applied to the solidification process of the experimental alloy to promote an isothermal coarsening process of the primary austenite dendrite network during solid and liquid coexistence. Through interrupted solidification experiments, the primary austenite is preserved and observed at room temperature. By application of stereological relations, the primary phase and its isothermal coarsening process are characterized as a function of the coarsening time applied. The microstructural evolution observed in the primary austenite in CGI and the measured morphological parameters show a similar trend to that observed for lamellar graphite cast iron (LGI) in previous investigations. The modulus of the primary austenite, Mγ, and the nearest distance between the centre of gravity of neighbouring austenite particles, Dγ, followed a linear relation with the cube root of coarsening time.

Thermal Fatigue Testing of SiMoCr Compacted Graphite Cast Iron for HPDC Tooling Application

2020 ◽  
Vol 14 (3) ◽  
pp. 846-852
Author(s):  
Primož Mrvar ◽  
Sebastjan Kastelic ◽  
Milan Terčelj ◽  
Mitja Petrič ◽  
Branko Bauer ◽  
...  
Keyword(s):  
Cast Iron ◽  
Thermal Fatigue ◽  
Fatigue Testing ◽  
Compacted Graphite ◽  
Graphite Cast Iron
Sign in / Sign up

Export Citation Format

Share Document