Higher quality, better mechanical properties of PM valve seat inserts: By identifying key parameters in copper infiltration process

2016 ◽  
Vol 71 (6) ◽  
pp. 465-468
Author(s):  
Mahnaz Mehdizadeh Lima ◽  
Mohammad Behnam ◽  
Soroor Yousefli
Keyword(s):  
Mechanical Properties ◽  
Valve Seat ◽  
Infiltration Process ◽  
Valve Seat Inserts

A Study on Reaction Bonded Ceramics Fabricated by Silicon Infiltration to B4C Preforms

2012 ◽  
Vol 724 ◽  
pp. 343-346 ◽  
Author(s):  
Rong Zhen Liu ◽  
Qing Wen Duan ◽  
Wen Wei Gu ◽  
Hai Yun Jin ◽  
Shao Chun Xu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Flexural Strength ◽  
Theoretical Result ◽  
Boron Carbide ◽  
Theoretical Calculation ◽  
Vickers Hardness ◽  
Volume Expansion ◽  
Maximum Density ◽  
Infiltration Process

Silicon was infiltrated into B4C preforms to fabricate B4C based composites ceramics at 1600 °C under vacuum circumstance. In this paper, silicon infiltration process was discussed by theoretical calculation. The volume expansion caused by reactions between silicon and boron carbide was about 89.1% from the calculation. In our study, the maximum density of B4C preform for the infiltration of silicon was about 1.5g/cm3 which was larger than theoretical result. The results of mechanical behavior showed that B4C based composites had excellent mechanical properties with a density lower than 2.6g/cm3, Vickers-hardness of this material was 27.2GPa, and this material showed a flexural strength of 349MPa and fracture toughness of 3.8 MPa*m1/2.

P/M Valve Seat Inserts: Air Quenching and Characterization

2017 ◽  
Author(s):  
Maurilio Pereira Gomes ◽  
Igor Santos ◽  
Camila Couto ◽  
Cristiano Mucsi ◽  
Jesualdo Luiz Rossi ◽  
...  
Keyword(s):  
Valve Seat ◽  
Valve Seat Inserts

Sintered Valve Seat Inserts – Microstructural Characterisation

2006 ◽  
pp. 65-70
Author(s):  
E.S. Jesus Filho ◽  
Edilson Rosa Barbarosa Jesus ◽  
Lucio Salgado ◽  
S.L. Jesus ◽  
M.A. Colosio ◽  
...  
Keyword(s):  
Valve Seat ◽  
Microstructural Characterisation ◽  
Valve Seat Inserts

Machining and Mechanical Characterisation of PM Materials for Valve Seat Inserts

2005 ◽  
pp. 79-85
Author(s):  
E.S. Jesus Filho ◽  
Lucio Salgado ◽  
S.L. de Jesus ◽  
J.L. Rossi ◽  
M.A. Colosio ◽  
...  
Keyword(s):  
Valve Seat ◽  
Mechanical Characterisation ◽  
Valve Seat Inserts

New Materials for Valve Seat Inserts

MTZ worldwide ◽  
2015 ◽  
Vol 76 (11) ◽  
pp. 30-35
Author(s):  
Denis Christopherson ◽  
Frank Zwein
Keyword(s):  
New Materials ◽  
Valve Seat ◽  
Valve Seat Inserts

scholarly journals Microstructural characterization of air quenched valve seat inserts obtained with AISI D2 tool steel

2017 ◽  
Author(s):  
M. P. Gomes ◽  
I. P. Santos ◽  
C. P. Couto ◽  
E. G. Betini ◽  
M. A. Colosio ◽  
...  
Keyword(s):  
Tool Steel ◽  
Microstructural Characterization ◽  
Valve Seat ◽  
Aisi D2 ◽  
Valve Seat Inserts ◽  
Aisi D2 Tool Steel

Effect of Laser Hardening Parameters on the Valve Seat of Worm Cast Iron

2011 ◽  
Vol 320 ◽  
pp. 108-111
Author(s):  
Ming Pang ◽  
Hui Li ◽  
Jian Song Tan ◽  
Guang Hui Xu ◽  
Quan Zhong Zhang
Keyword(s):  
Mechanical Properties ◽  
Cast Iron ◽  
Laser Welding ◽  
Optical Microscopy ◽  
Laser Power ◽  
Residual Austenite ◽  
Laser Hardening ◽  
Valve Seat ◽  
Hardened Zone ◽  
Non Equilibrium

Exploring experiments of the laser hardening valve seat of worm cast iron were conducted.Microstructure of laser hardening region was characterized by optical microscopy (OM). Mechanical properties of the hardening region were evaluated by hardness. Effect of laser hardening parameters on the valve seat of worm cast iron were discussed in detail. Results show that the harded region have non-equilibrium microstructures consisting of martensite and residual austenite with a little ferrite. Microstructure of the martensite shell around the worm graphite in the hardened zone is observed. With increasing defocusing distance ,the hardness of hardened region decrease.The hardness of hardened region can be increased by imporving laser power and reducing laser welding velocity.

High thermal conductivity valve seat inserts and guides

MTZ worldwide ◽  
2018 ◽  
Vol 79 (9) ◽  
pp. 42-49
Author(s):  
Philippe Beaulieu ◽  
Sascha Orazem ◽  
Gunther Reissinger ◽  
David Woodward
Keyword(s):  
Thermal Conductivity ◽  
High Thermal Conductivity ◽  
Valve Seat ◽  
Valve Seat Inserts
Sign in / Sign up

Export Citation Format

Share Document