The Influence of Segregations after Forming on the Heat Treatment Result of Bevel Gears

2019 ◽  
Vol 90 (6) ◽  
pp. 1800427 ◽  
Author(s):  
Martin Hunkel ◽  
Jwalant Kagathara ◽  
Ulrich Prahl
Keyword(s):  
Heat Treatment ◽  
Treatment Result ◽  
Bevel Gears

scholarly journals Tailored Forming of Hybrid Bevel Gears with Integrated Heat Treatment

2020 ◽  
Vol 47 ◽  
pp. 301-308 ◽  
Author(s):  
Bernd-Arno Behrens ◽  
Julian Diefenbach ◽  
Anna Chugreeva ◽  
Christoph Kahra ◽  
Sebastian Herbst ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Bevel Gears ◽  
Tailored Forming

scholarly journals Microstructural Evolution and Mechanical Properties of Hybrid Bevel Gears Manufactured by Tailored Forming

Metals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1365
Author(s):  
Bernd-Arno Behrens ◽  
Anna Chugreeva ◽  
Julian Diefenbach ◽  
Christoph Kahra ◽  
Sebastian Herbst ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Tensile Tests ◽  
The Novel ◽  
Bevel Gears ◽  
Processing Step ◽  
Near Net Shape ◽  
Manufacturing Technologies ◽  
Plasma Transferred Arc Welding ◽  
Tailored Forming ◽  
Processing Steps

The production of multi-metal bulk components requires suitable manufacturing technologies. On the example of hybrid bevel gears featuring two different steels at the outer surface and on the inside, the applicability of the novel manufacturing technology of Tailored Forming was investigated. In a first processing step, a semi-finished compound was manufactured by cladding a substrate using a plasma transferred arc welding or a laser hotwire process. The resulting semi-finished workpieces with a metallurgical bond were subsequently near-net shape forged to bevel gears. Using the residual heat after the forging process, a process-integrated heat treatment was carried out directly after forming. For the investigations, the material combinations of 41Cr4 with C22.8 (AISI 5140/AISI 1022M) and X45CrSi9-3 with C22.8 (AISI HNV3/AISI 1022M) were applied. To reveal the influence of the single processing steps on the resulting interface, metallographic examinations, hardness measurements and micro tensile tests were carried out after cladding, forging and process-integrated heat treatment. Due to forging and heat-treatment, recrystallization and grain refinement at the interface and an increase in both, hardness and tensile strength, were observed.

Distortions induced by heat treatment of automotive bevel gears

2004 ◽  
Vol 153-154 ◽  
pp. 476-481 ◽  
Author(s):  
J.R. Cho ◽  
W.J. Kang ◽  
M.G. Kim ◽  
J.H. Lee ◽  
Y.S. Lee ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Bevel Gears

Effect of Heat Treatment on Isothermal Oxidation of Fe-33Ni-18Cr Alloy at 1000°C

2020 ◽  
Vol 1010 ◽  
pp. 9-14
Author(s):  
Zahraa Zulnuraini ◽  
Noraziana Parimin
Keyword(s):  
Heat Treatment ◽  
Grain Size ◽  
Minimum Weight ◽  
Isothermal Oxidation ◽  
Optical Microscope ◽  
Grain Structure ◽  
Treatment Result ◽  
Oxidation Test ◽  
Heat Treated ◽  
Average Grain Size

This research study was focused on the effect of heat treatment on the isothermal oxidation of Fe-33Ni-18Cr alloy at 1000 °C. The Fe-33Ni-18Cr alloy was undergone heat treatment at three different temperatures, namely 1000 °C, 1100 °C and 1200 °C for 3 hours soaking time followed by water quench to vary the grain size of the alloy. The heat-treated alloys was prepared for further isothermal oxidation test. The heat-treated alloys was ground by using several grit of silicon carbide papers as well as weighed by using analytical balance and measured by using Vernier caliper before the oxidation test. The heat-treated Fe-33Ni-18Cr alloys was isothermally oxidized at 1000 °C for 150 hours exposure time. The characterization of the oxidized samples was carried out using optical microscope and scanning electron microscope (SEM). The heat treatment result shows that, increasing the heat treatment temperature was increased the average grain size of the alloy. The kinetics of oxidation was followed the parabolic rate law which represent the diffusion-controlled oxide growth rate. Fine grain structure of 1000i-1000 sample shows minimum weight gain and lower oxidation rate compared to samples of 1000i-1100 and 1000i-1200. On the other hand, 1000i-1100 and 1000i-1200 samples indicate the formation of oxide spallation and crack propagation on the oxidized surface, respectively.

Flexural Performance of the Heat-Treated Boron Alloyed Steel

2017 ◽  
Vol 909 ◽  
pp. 21-26
Author(s):  
R. Hafsham ◽  
M.S. Salwani ◽  
H. Mas-Ayu ◽  
Rosdi Daud
Keyword(s):  
Heat Treatment ◽  
Hot Stamping ◽  
Treatment Result ◽  
Boron Steel ◽  
Flexural Test ◽  
Flexural Performance ◽  
Heat Treated ◽  
Quenching Process ◽  
Result Show ◽  
Boron Steels

Boron alloyed steels, especially 22MnB5, have been the point of focus for the materials choice in hot stamping. Objective of this project is to analyze the effect of heat treatment on its flexural performance. In this paper, five conditions of boron steels are analyzed. Specimens consist of the as-received (A), hot pressed (H) and quenched boron steel (QA,QWR, QWC). Flexural test was conducted to give more evidence on the flexural strength of the boron steel based on their process of heat treatment. Result show that Boron steel 22MnB5 undergone quenching process by using water at room temperature yield highest flexural strain.

The Precipitation of Si in AlCuSi Thin Films

1973 ◽  
Vol 31 ◽  
pp. 34-35 ◽  
Author(s):  
R. M. Anderson
Keyword(s):  
Electron Microscopy ◽  
Thin Films ◽  
Heat Treatment ◽  
Solid Solution ◽  
Integrated Circuit ◽  
Copper Film ◽  
Solution Concentration ◽  
X Ray ◽  
Silicon Thin Films ◽  
Before And After

Aluminum-copper-silicon thin films have been considered as an interconnection metallurgy for integrated circuit applications. Various schemes have been proposed to incorporate small percent-ages of silicon into films that typically contain two to five percent copper. We undertook a study of the total effect of silicon on the aluminum copper film as revealed by transmission electron microscopy, scanning electron microscopy, x-ray diffraction and ion microprobe techniques as a function of the various deposition methods.X-ray investigations noted a change in solid solution concentration as a function of Si content before and after heat-treatment. The amount of solid solution in the Al increased with heat-treatment for films with ≥2% silicon and decreased for films <2% silicon.

The influence of heat treatment on the fiber/matrix interface in a SiC-reinforced glassceramic

1988 ◽  
Vol 46 ◽  
pp. 742-743
Author(s):  
E. Bischoff ◽  
O. Sbaizero
Keyword(s):  
Heat Treatment ◽  
Aluminum Silicate ◽  
Lithium Aluminum ◽  
Interfacial Region ◽  
Specimen Preparation ◽  
Crack Wake ◽  
Pull Out ◽  
Annealed Material ◽  
Ultrasonic Drilling ◽  
Fiber Matrix Interface

Fiber or whisker reinforced ceramics show improved toughness and strength. Bridging by intact fibers in the crack wake and fiber pull-out after failure contribute to the additional toughness. These processes are strongly influenced by the sliding and debonding resistance of the interfacial region. The present study examines the interface in a laminated 0/90 composite consisting of SiC (Nicalon) fibers in a lithium-aluminum-silicate (LAS) glass-ceramic matrix. The material shows systematic changes in sliding resistance upon heat treatment.As-processed samples were annealed in air at 800 °C for 2, 4, 8, 16 and 100 h, and for comparison, in helium at 800 °C for 4 h. TEM specimen preparation of as processed and annealed material was performed with special care by cutting along directions having the fibers normal and parallel to the section plane, ultrasonic drilling, dimpling to 100 pm and final ionthinning. The specimen were lightly coated with Carbon and examined in an analytical TEM operated at 200 kV.

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