Effect of separate heat treatment parameters on the accuracy of gear wheels

1970 ◽  
Vol 12 (12) ◽  
pp. 1007-1010 ◽  
Author(s):  
V. A. Murzin ◽  
V. P. Ponomarev ◽  
N. N. Tolmachevskii ◽  
G. D. Glezer ◽  
A. V. Poropov ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Gear Wheels

Decreasing the distortion of cylindrical gear wheels during heat treatment

1969 ◽  
Vol 10 (12) ◽  
pp. 947-951
Author(s):  
A. N. Belyaev ◽  
A. A. Borisov ◽  
N. F. Butovskii ◽  
F. A. Vorob'ev ◽  
G. I. Kogan
Keyword(s):  
Heat Treatment ◽  
Cylindrical Gear ◽  
Gear Wheels

Volume changes of large gear wheels in carburization and heat treatment

1986 ◽  
Vol 28 (12) ◽  
pp. 858-860 ◽  
Author(s):  
L. N. Vashchuk ◽  
O. A. Kon'ko ◽  
V. T. Alekseenko ◽  
V. K. Adamanova
Keyword(s):  
Heat Treatment ◽  
Volume Changes ◽  
Large Gear ◽  
Gear Wheels

scholarly journals Induction Heating of Gear Wheels in Consecutive Contour Hardening Process

Energies ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3885
Author(s):  
Jerzy Barglik ◽  
Adrian Smagór ◽  
Albert Smalcerz ◽  
Debela Geneti Desisa
Keyword(s):  
Heat Treatment ◽  
Induction Heating ◽  
Temperature Fields ◽  
High Tech ◽  
Total Efficiency ◽  
Critical Temperatures ◽  
Hardening Process ◽  
Conventional Heat Treatment ◽  
Non Linear ◽  
Gear Wheels

Induction contour hardening of gear wheels belongs to effective heat treatment technologies especially recommended for high-tech applications in machinery, automotive and aerospace industries. In comparison with long term, energy consuming conventional heat treatment (carburizing and consequent quenching), its main positive features are characterized by high total efficiency, short duration and relatively low energy consumption. However, modeling of the process is relatively complicated. The numerical model should contain both multi-physic and non-linear formulation of the problem. The paper concentrates on the modeling of rapid induction heating being the first stage of the contour induction hardening process which is the time consuming part of the computations. It is taken into consideration that critical temperatures and consequently the hardening temperature are dependent on the velocity of the induction heating. Numerical modeling of coupled non-linear electromagnetic and temperature fields are shortly presented. Investigations are provided for gear wheels made of a special quality steel AISI 300M. In order to evaluate the accuracy of the proposed approach, exemplary computations of the full induction contour hardening process are provided. The exemplary results are compared with the measurements and a satisfactory accordance between them is achieved.

scholarly journals The Selected Measurement Problems in the Aspect of the Non-Destructive Testing of the Gear Wheels and the other Parts

2014 ◽  
Vol 14 (4) ◽  
pp. 92-101
Author(s):  
S. Jończyk ◽  
T. Babul ◽  
S. Włodarczyk
Keyword(s):  
Heat Treatment ◽  
The Other ◽  
Non Destructive Testing ◽  
Surface Layers ◽  
Destructive Testing ◽  
Stress Changes ◽  
Different Depths ◽  
Gear Wheels ◽  
Local Defects ◽  
Non Destructive

Abstract This paper presents an overview of the results of studies which, in addition to the detection of differences in the structure of the product and the thickness of the surface layers, aimed to diversify the signal from the stress changes caused by cracks, assess local defects in the microstructure deformed by heat treatment and detect hydrogen „in statu nascendi”. Measurements were performed using Wirotest 1000. Specialized probes were used to allow measurements on surfaces difficult to reach. Measurements were taken at different depths of penetration. Assessment of the correlation of eddy current measurements and microhardness was also performed.

Criteria for estimating the endurance of gear wheels strengthened by chemical heat treatment

1989 ◽  
Vol 31 (8) ◽  
pp. 608-612
Author(s):  
V. A. Olovyanishnikov ◽  
V. M. Zinchenko ◽  
B. V. Georgievskaya ◽  
V. V. Kuznetsov
Keyword(s):  
Heat Treatment ◽  
Chemical Heat Treatment ◽  
Chemical Heat ◽  
Gear Wheels

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.

Strain-induced martensite effects on transgranular carbide precipitation in type 304 stainless steels

1991 ◽  
Vol 49 ◽  
pp. 604-605
Author(s):  
A.H. Advani ◽  
L.E. Murr ◽  
D. Matlock
Keyword(s):  
Heat Treatment ◽  
Grain Boundary ◽  
Stress Corrosion Cracking ◽  
Stainless Steels ◽  
Deformation Twin ◽  
Austenitic Stainless Steels ◽  
Carbide Precipitation ◽  
Strain Induced Martensite ◽  
Type 304

Thermomechanically induced strain is a key variable producing accelerated carbide precipitation, sensitization and stress corrosion cracking in austenitic stainless steels (SS). Recent work has indicated that higher levels of strain (above 20%) also produce transgranular (TG) carbide precipitation and corrosion simultaneous with the grain boundary phenomenon in 316 SS. Transgranular precipitates were noted to form primarily on deformation twin-fault planes and their intersections in 316 SS.Briant has indicated that TG precipitation in 316 SS is significantly different from 304 SS due to the formation of strain-induced martensite on 304 SS, though an understanding of the role of martensite on the process has not been developed. This study is concerned with evaluating the effects of strain and strain-induced martensite on TG carbide precipitation in 304 SS. The study was performed on samples of a 0.051%C-304 SS deformed to 33% followed by heat treatment at 670°C for 1 h.

Effect of a Complex Heat Treatment on the Structure of 300M Steel

1981 ◽  
Vol 39 ◽  
pp. 312-313
Author(s):  
R. Padmanabhan ◽  
W. E. Wood
Keyword(s):  
Heat Treatment ◽  
Metal Carbides ◽  
Austenite Grain Size ◽  
300M Steel ◽  
Heat Treated ◽  
Strain Fracture ◽  
Prior Austenite Grain Size ◽  
Short Time ◽  
Final Tempering ◽  
Similar Yield

Intermediate high temperature tempering prior to subsequent reaustenitization has been shown to double the plane strain fracture toughness as compared to conventionally heat treated UHSLA steels, at similar yield strength levels. The precipitation (during tempering) of metal carbides and their subsequent partial redissolution and refinement (during reaustenitization), in addition to the reduction in the prior austenite grain size during the cycling operation have all been suggested to contribute to the observed improvement in the mechanical properties. In this investigation, 300M steel was initially austenitized at 1143°K and then subjected to intermediate tempering at 923°K for 1 hr. before reaustenitizing at 1123°K for a short time and final tempering at 583°K. The changes in the microstructure responsible for the improvement in the properties have been studied and compared with conventionally heat treated steel. Fig. 1 shows interlath films of retained austenite produced during conventionally heat treatment.

Crystallization of MgO • Al2 • SiO2 • ZrO2 glasses

1986 ◽  
Vol 44 ◽  
pp. 440-441
Author(s):  
M. A. McCoy
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Powder Processing ◽  
Glass Composition ◽  
Ceramic Powder ◽  
Transformation Toughening ◽  
Ceramic Powder Processing ◽  
Processing Techniques ◽  
Ceramic Matrices

Transformation toughening by ZrO2 inclusions in various ceramic matrices has led to improved mechanical properties in these materials. Although the processing of these materials usually involves standard ceramic powder processing techniques, an alternate method of producing ZrO2 particles involves the devtrification of a ZrO2-containing glass. In this study the effects of glass composition (ZrO2 concentration) and heat treatment on the morphology of the crystallization products in a MgO•Al2•SiO2•ZrO2 glass was investigated.

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