Laser Applications in Surface Modification (Advanced Topics in Science and Technology in China, 65)

✍ Scribed by Jianhua Yao, Qunli Zhang, Rong Liu, Guolong Wu

• Publisher: Springer
• Year: 2022
• Tongue: English
• Leaves: 150
• Category: Library

✦ Synopsis

This book introduces the applications of laser in surface modification, such as laser cladding of Stellite alloys and metal-ceramic composites. Besides, nanomaterials including carbon nanotubes and Al₂O₃ nanoparticles are brought into the laser processing, to form high-temperature resistance, chemical stability, and wear- and oxidation-resistant composite coatings. The readers will get more knowledge about the basic principle and application of laser cladding and laser surface hardening technologies, and gain a deep insight into the process and characteristics of the nanomaterial-assisted laser surface enhancement. It provides references for the researchers, engineers, and students in the fields of mechanical engineering, laser processing, and material engineering.

✦ Table of Contents

Preface
Contents
1 Introduction
1.1 Hardfacing via Laser Cladding
1.1.1 Materials for Hardfacing
1.1.2 Stellite Alloys
1.1.3 Hardfacing Process
1.1.4 Hardfacing from Laser Process
1.2 Surface Hardening by Laser
1.2.1 Features and Advantages
1.2.2 Applications on Steel and Cast Iron
1.3 Laser Treatment of Nanomaterials
1.3.1 Characteristics of Nanomaterials
1.3.2 Beneficial Effects of Nanoparticles
1.3.3 Nanoparticles in Surface Coatings
References
2 Laser Cladding of Stellite Alloys
2.1 Stellite Alloy Hardfacing for Control Valves
2.1.1 Sealing Surface Enhancement
2.1.2 Improvement of Stellite Alloy Hardfacings
2.2 Stellite 6 Hardfacing
2.2.1 Problems in Amine Environment
2.2.2 Fabrication of Hardfacings
2.2.3 Microstructure and Carbide Ratio
2.2.4 Hardness and Wear Properties
2.2.5 Corrosion Behavior Under Polarization Test
2.2.6 Corrosion Behavior Under Failure Test
2.3 Stellite Alloy Mixture Hardfacing
2.3.1 Laser Hardfacing Process
2.3.2 Microstructure Characteristics
2.3.3 Hardness and Wear Resistance
2.3.4 Cavitation-Erosion Performance
2.3.5 Electrochemical Corrosion Behavior
2.4 Molybdenum Stellite Alloy Hardfacings
2.4.1 Laser Creation of Hardfacings
2.4.2 Microstructural Characterization
2.4.3 Hardness and Wear Performance
2.4.4 Corrosion Resistance of Hardfacings
2.5 Summary of Stellite Alloy Hardfacings
References
3 Laser Cladding of Metal-Ceramic Composites
3.1 Surface Enhancement with Composite Coatings
3.1.1 Laser Deposition of Metal-Ceramic Composite Coatings
3.1.2 Improvement of Metal-Ceramic Composite Coatings
3.2 Nickel Alloy Composite Coatings
3.2.1 Laser Cladding of WC/NiCrMo Composite
3.2.2 Morphology of Coating Specimens
3.2.3 Microstructure of Coating Specimens
3.2.4 Elemental Dilution
3.2.5 Coating Hardness
3.2.6 Coating Wear Performance
3.3 Steel Composite Coating
3.3.1 Laser Cladding of TiC/H13 Composite
3.3.2 Microstructure of TiC/H13 Composite Coating
3.3.3 Tribological Behavior of TiC/H13 Composite Coating
3.3.4 Thermal Stability of TiC/H13 Composite Coating
3.4 Summary of Composite Coating via Laser Cladding
References
4 Laser Surface Hardening
4.1 Surface Hardening of Steels
4.1.1 Methods of Surface Hardening
4.1.2 Surface Hardening via Laser Process
4.2 Surface Hardening of 17-4PH Stainless Steel
4.2.1 Laser Hardening Process
4.2.2 Microstructure of Hardened Surface
4.2.3 Hardness of Hardened Surface
4.2.4 Mechanical Properties of Hardened Surface
4.2.5 Cavitation-Erosion Resistance of Hardened Surface
4.2.6 Extreme Value Analysis (EVA) Model
4.3 Surface Hardening of Cast Iron
4.3.1 Laser Surface Remelting
4.3.2 Microstructure of Hardened Layer
4.3.3 Hardness and Wear Resistance of Hardened Layer
4.4 Summary of Laser Surface Hardening
References
5 Laser-Processed Coatings Involving Nanoparticles
5.1 Laser Process of Nanomaterials
5.1.1 Application of Nanoparticles in Material Development
5.1.2 Laser Process of Nanoparticle-Containing Materials
5.2 Carbon Nanotubes Containing Superalloy Coating
5.2.1 Strengthening of Inconel 718 Alloy
5.2.2 Preparation of Coated Carbon Nanotubes (CNTs)
5.2.3 Laser Cladding Experiment
5.2.4 Morphology of Ni-Coated MWCNTs Powder
5.2.5 Microstructure of Cladded Specimens
5.2.6 Laves Phase Formation
5.3 Coating Prepared Using Nano-Al2O3
5.3.1 Preparation of Coating with Fine Grains
5.3.2 Microstructures of Ni–P–Al2O3 Plating and Coating
5.3.3 Microhardness of Plating and Coating
5.4 Coatings Prepared with Different Laser Powers
5.4.1 Coating Preparation Processes
5.4.2 Coatings Prepared with Low Laser Power
5.4.3 Coatings Prepared with High Laser Power
5.4.4 Microhardness and Wear Resistance of Coatings
5.5 Cracking of Nano-Al2O3 Coatings
5.5.1 Nano-Al2O3 Coating Preparation
5.5.2 Crack Examination
5.5.3 Laser Process Parameters
5.5.4 Ratio of Nano-Al2O3 Particle
5.5.5 Overlapping of Coating
5.6 Summary of Laser Cladding of Nanomaterials
References