scholarly journals Techniques and Equipment Types to Harden Gears

2021 ◽  
Author(s):  
Benjamin T. Bernard
Keyword(s):  
Heat Treatment ◽  
Mechanical Performance ◽  
Process Development ◽  
Heat Treating ◽  
Protective Atmosphere ◽  
Base Case ◽  
Vacuum Carburizing ◽  
Maintenance Costs ◽  
Gear Design ◽  
High Production

Abstract Material science and thermodynamics are applied in heat treating to achieve mechanical performance in gears. The technique includes part design, fixturing, and process development. Different furnaces may offer unique advantages, like minimizing part distortion, while operating and maintenance costs vary greatly for hardening furnaces. The challenge is to understand which furnace type can most effectively process the gear design and material grade. Protective-atmosphere furnace solutions are well-suited for hardening of gears. The process techniques include gas or vacuum carburizing, carbonitriding, and neutral hardening in a carbon-based atmosphere or in a vacuum. This paper will discuss vacuum, controlled atmosphere, and hybrid furnace types highlighting available processes while sharing respective associated operation and maintenance costs. Batch integral quench (BIQ) furnaces will be the base case for comparison, as they comprise the largest installed base for gear heat treatment. While a discussion of when to consider continuous atmosphere furnace equipment by defining what is high production versus today’s BIQ furnace capacities for gear heat treatment.

Hydrogen diffusion kinetics under different conditions applied to VT6 alloy

2020 ◽  
pp. 98-107
Author(s):  
E. I. Maslikova ◽  
V. D. Andreeva ◽  
E. L. Alekseeva ◽  
Yu. A. Yakovlev
Keyword(s):  
Heat Treatment ◽  
Oxide Film ◽  
Titanium Alloys ◽  
Hydrogen Diffusion ◽  
Heat Treating ◽  
Protective Atmosphere ◽  
Diffusion Kinetics ◽  
Hydrogen Charging ◽  
Hydride Formation ◽  
Different Types

Research of hydrogen diffusion in VT6 alloy is carried out considering different types of heat treating and hydrogen charging. The influence of microalloying on the susceptibility to hydride formation and embrittlement of titanium alloys is analyzed, and also effects of an oxide film on hydrogen charging during heat treatment without protective atmosphere, are studied.

UHB TRI-Z

Alloy Digest ◽  
1966 ◽  
Vol 15 (10) ◽  
Keyword(s):  
Heat Treatment ◽  
Compressive Strength ◽  
Cold Rolling ◽  
Heat Treating ◽  
High Carbon ◽  
Absolute Minimum ◽  
Rolling Mills ◽  
High Chromium ◽  
Cold Rolling Mills ◽  
High Production

Abstract UHB TRI-Z is a high-carbon high-chromium tool steel with an absolute minimum of nonmettalic inclusions. It is an air hardening steel having high resistance to abrasive wear. It is recommended for intricate dies where maximum accuracy in heat treatment and high production are essential. It is also very suitable for working rolls in Sendzimir Cold Rolling Mills (which is implied by the letter Z). This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive strength. It also includes information on forming, heat treating, machining, and joining. Filing Code: TS-184. Producer or source: Uddeholm (Canada) Ltd.

Heat Treatment of Gears

2000 ◽  
Author(s):  
A.K. Rakhit
Keyword(s):  
Heat Treatment ◽  
Induction Hardening ◽  
Heat Treating ◽  
Structure And Properties ◽  
Process Selection ◽  
Torque Density ◽  
Gear Design ◽  
Secondary Operations ◽  
Composition Structure ◽  
Compare And Contrast

Heat Treatment of Gears: A Practical Guide for Engineers describes the processes and procedures used to harden alloy steel gears and explains how to optimize benefits, such as improved fatigue life, while minimizing distortion and costs. The first few chapters familiarize readers with the basic concepts of heat treating and its effect on the composition, structure, and properties of iron-carbon alloys. The chapters that follow compare and contrast the heat treatments typically used for gears, including through hardening, induction hardening, carburizing, nitriding, and carbonitriding. Carburizing and nitriding are covered in much greater depth than the other methods because of their extensive use and the advantages they offer. As the book explains, carburizing produces gears with three to four times the torque density than that achieved by other methods, while nitriding causes the least amount of distortion. The book also addresses the disadvantages of each process and, using examples, presents various ways to get around them. It also discusses secondary operations, such as shot peening and finish grinding, and provides insights on material and process selection as well as gear design. For information on the print version, ISBN 978-0-87170-694-2, follow this link.

Mechanical Performance and Fracture of 3-Ply Cu/Al/Cu Clad Metals

2012 ◽  
Vol 557-559 ◽  
pp. 23-27 ◽  
Author(s):  
In Kyu Kim ◽  
Jong Su Ha ◽  
Sun Ig Hong
Keyword(s):  
Heat Treatment ◽  
Reaction Layer ◽  
Mechanical Performance ◽  
Heat Treating ◽  
Compound Layer ◽  
Treatment Temperature ◽  
Tensile Direction ◽  
Heat Treated ◽  
Clad Metals ◽  
Reaction Compound

The mechanical performance and fracture of roll-bonded Cu/Al/Cu clad metal were investigated after heat treatment in the temperature range 200~500OC. In the roll-bonded 3-ply Cu/Al/Cu clad metal, no visible interfacial reaction compound and defects were observed at the interfaces, ensuring the well-bonded Cu/Al interface until the final moment of fracture in tension. The reaction layer was observed at the Cu/Al interface after annealing at and above 400OC, which deteriorated the ductility of clad metals. The thickness of the reaction layer increased with increasing heat treatment temperature. The periodic cracks were formed perpendicular to the tensile direction due to the strain mismatch between metal layers and the reaction compound layer in the clad heat treated at high temperatures at 500oC. The slip localization and delamination induced premature crack formation in Cu and Al layer, resulting in the decreased clad metal fracture strain, especially after heat treating at 500oC.

Process development and impact of intrinsic heat treatment on the mechanical performance of selective laser melted AISI 4140

2019 ◽  
Vol 28 ◽  
pp. 275-284 ◽  
Author(s):  
James Damon ◽  
Robin Koch ◽  
Daniel Kaiser ◽  
Gregor Graf ◽  
Stefan Dietrich ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Mechanical Performance ◽  
Process Development ◽  
Aisi 4140

Microstructural and Mechanical Behaviour Evaluation of Mg-Al-Zn Alloy Friction Stir Welded Joint

2020 ◽  
Vol 17 (3) ◽  
pp. 8150-8159
Author(s):  
Kulwant Singh ◽  
Gurbhinder Singh ◽  
Harmeet Singh
Keyword(s):  
Heat Treatment ◽  
Friction Stir Welding ◽  
Magnesium Alloys ◽  
Mechanical Performance ◽  
Fuel Efficiency ◽  
Research Work ◽  
Grain Structure ◽  
Tensile Fracture ◽  
Friction Stir ◽  
The Impact

The weight reduction concept is most effective to reduce the emissions of greenhouse gases from vehicles, which also improves fuel efficiency. Amongst lightweight materials, magnesium alloys are attractive to the automotive sector as a structural material. Welding feasibility of magnesium alloys acts as an influential role in its usage for lightweight prospects. Friction stir welding (FSW) is an appropriate technique as compared to other welding techniques to join magnesium alloys. Field of friction stir welding is emerging in the current scenario. The friction stir welding technique has been selected to weld AZ91 magnesium alloys in the current research work. The microstructure and mechanical characteristics of the produced FSW butt joints have been investigated. Further, the influence of post welding heat treatment (at 260 °C for 1 h) on these properties has also been examined. Post welding heat treatment (PWHT) resulted in the improvement of the grain structure of weld zones which affected the mechanical performance of the joints. After heat treatment, the tensile strength and elongation of the joint increased by 12.6 % and 31.9 % respectively. It is proven that after PWHT, the microhardness of the stir zone reduced and a comparatively smoothened microhardness profile of the FSW joint obtained. No considerable variation in the location of the tensile fracture was witnessed after PWHT. The results show that the impact toughness of the weld joints further decreases after post welding heat treatment.

ALTEMP HX

Alloy Digest ◽  
1993 ◽  
Vol 42 (10) ◽  
Keyword(s):  
Heat Treatment ◽  
Solid Solution ◽  
Fracture Toughness ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Base Alloy ◽  
Heat Treating ◽  
Nickel Base Alloy ◽  
Temperature Performance ◽  
Nickel Base

Abstract ALTEMP HX is an austenitic nickel-base alloy designed for outstanding oxidation and strength at high temperatures. The alloy is solid-solution strengthened. Applications include uses in the aerospace, heat treatment and petrochemical markets. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fracture toughness and creep. It also includes information on low and high temperature performance, and corrosion resistance as well as forming, heat treating, and joining. Filing Code: Ni-442. Producer or source: Allegheny Ludlum Corporation.

CMW 100

Alloy Digest ◽  
2000 ◽  
Vol 49 (10) ◽  
Keyword(s):  
Thermal Conductivity ◽  
Heat Treatment ◽  
Copper Alloy ◽  
High Strength ◽  
Heat Treating ◽  
Age Hardening ◽  
High Tensile Strength ◽  
Electrical Components ◽  
Flash Welding ◽  
Hardening Heat Treatment

Abstract CMW 100 is a copper alloy that combines high tensile strength with high electrical and thermal conductivity. It responds to age-hardening heat treatment. It is used for flash welding dies, springs, electrical components, high-strength backing material for brazed assemblies, and wire guides. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fatigue. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: CU-29. Producer or source: CMW Inc. Originally published as Mallory 100, August 1955, revised October 2000.

CONDULOY

Alloy Digest ◽  
1953 ◽  
Vol 2 (10) ◽  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Physical Properties ◽  
Tensile Properties ◽  
Copper Alloy ◽  
Heat Treating ◽  
Age Hardening ◽  
Beryllium Copper ◽  
Hardening Heat Treatment

Abstract CONDULOY is a low beryllium-copper alloy containing about 1.5% nickel. It responds to age-hardening heat treatment for improved mechanical properties. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on casting, heat treating, machining, and joining. Filing Code: Cu-11. Producer or source: Brush Beryllium Company.

UNS A02960

Alloy Digest ◽  
1987 ◽  
Vol 36 (12) ◽  
Keyword(s):  
Heat Treatment ◽  
Tensile Properties ◽  
Heat Treating ◽  
Age Hardening ◽  
Casting Alloy ◽  
Passenger Cars ◽  
Temperature Performance ◽  
Mold Casting ◽  
Railway Passenger ◽  
Hardening Heat Treatment

Abstract UNS No. A02060 is an aluminum-mold casting alloy that responds to an age-hardening heat treatment. It is recommended for applications that require a combination of high tensile properties and good machinability. Among its many uses are fuel pump bodies, aircraft fittings and seat frames for railway passenger cars. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive and shear strength as well as fatigue. It also includes information on high temperature performance as well as casting, heat treating, machining, and joining. Filing Code: Al-285. Producer or source: Various aluminum companies.

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