scholarly journals Damage types of crossed helical gears with wheels from sintered steel

2011 ◽  
Vol 43 (2) ◽  
pp. 205-214 ◽  
Author(s):  
A. Miltenovic ◽  
W. Predki
Keyword(s):  
Wear Resistance ◽  
Sintered Material ◽  
Load Capacity ◽  
Additional Treatment ◽  
Case Hardening ◽  
Sintered Steel ◽  
Helical Gears ◽  
Copper Addition ◽  
Iron Based ◽  
Damage Types

Sintered steel appears to be a very effective material for wheels in crossed helical gears. High demands are set on gears made from sintered steel regarding wear, fretting, tooth fracture and pitting load capacity. This report shows results of iron-based sintered material Fe1.5Cr0.2Mo in case of crossed helical gears concerning wear resistance and other damage types under different speed, torque and lubricants. As material variants, samples with additional treatment, such as pyrohydrolysis, case hardening, shot peening, sinter-hardening, and 2% copper addition are used.

Crossed Helical Gears with Wheels Manufactured from Sintered Steel with Pyrohydrolysis

2013 ◽  
Vol 633 ◽  
pp. 197-208 ◽  
Author(s):  
Aleksandar Miltenovic ◽  
Radivoje Mitrovic ◽  
Milan Banic
Keyword(s):  
High Performance ◽  
Sintered Material ◽  
Load Capacity ◽  
Motor Vehicles ◽  
Sintered Steel ◽  
Helical Gears ◽  
One Step ◽  
Servo Drives ◽  
Damage Types ◽  
Luxury Class

Crossed helical gears are used in cars and many household appliances. The trend towards increased comfort in motor vehicles has led to the utilization of more than a hundred servo-drives in luxury class automobiles. Key advantages of crossed helical gears are their simple and inexpensive design, good noise performance and high ratios that can be realized in one step. Sintered steel is a highly favorable material for wheels in crossed helical gears. They are able to satisfy high performance demands in the areas of wear, fretting, tooth fracture and pitting load capacity. This report describes the results of an examination into the use of the iron-based sintered material Fe1.5Cr0.2Mo with pyrohydrolysis in crossed helical gears, in the areas of wear resistance and other damage types under different speeds and loading conditions.

scholarly journals Wear load capacity of crossed helical gears with wheel made from sintered steel

2015 ◽  
Vol 47 (2) ◽  
pp. 153-163 ◽  
Author(s):  
A. Miltenovic ◽  
V. Nikolic ◽  
M. Banic
Keyword(s):  
Power Transmission ◽  
Load Capacity ◽  
Helical Gear ◽  
Low Noise ◽  
Additional Treatment ◽  
Sintered Steel ◽  
Helical Gears ◽  
Noise Characteristics ◽  
Hardening Treatment ◽  
Important Position

Crossed helical gears have an important position in power transmission. Important advantages of the crossed helical gears are the small design, the realization of high ratios in one stage, and the low noise characteristics. The paper presents a theoretical and experimental research of mesh efficiency, tooth friction coefficient and wear for a wheel of crossed helical gears made of Fe1.5Cr0.2Mo sintered steel with sinter-hardening treatment and without additional treatment. The calculation method is also given for the determination of wear load capacity of the worm with a helical gear made of Fe1.5Cr0.2Mo sintered steel with sinter-hardening treatment. These results provide product developers with the first important clues for indicators for calculation of the worm with a helical gear.

scholarly journals Influence of hardening on the microstructure and the wear capacity of gears made of Fe1.5Cr0.2Mo sintered steel

2010 ◽  
Vol 42 (2) ◽  
pp. 183-191 ◽  
Author(s):  
W. Predki ◽  
A. Miltenovic
Keyword(s):  
Sinter Process ◽  
Load Capacity ◽  
Additional Treatment ◽  
Sintered Steel ◽  
Helical Gears ◽  
The Core ◽  
Tooth Fracture ◽  
Core Hardness

High demands are set on gears made from sintered steel regarding wear, fretting, tooth fracture and pitting load capacity. The hardening obtained after the sinter process will affect the microstructure of the sintered steel so that the wear load capacity can increase to higher values. This report shows the influence of different hardenings methods on crossed helical gears fabricated from Fe1.5Cr0.2Mo sintered steel and the changes induced on the microstructure, the surface and the core hardness and the wear load capacity. The research presented in this paper is aimed at finding the most appropriate additional treatment which leads to higher wear load capacity as compared to the wear of sintered steel gears without any additional treatment.

LUCEFIN GROUP 20NiCrMo2-2(1.6523), 20NiCrMoS2-2 (1.6526)

Alloy Digest ◽  
2020 ◽  
Vol 69 (12) ◽  
Keyword(s):  
Wear Resistance ◽  
Fatigue Strength ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Medium Size ◽  
Case Hardening ◽  
Low Carbon ◽  
High Fatigue

Abstract Lucefin Group 20NiCrMo2-2 and 20NiCrMoS2-2 are low-carbon, Ni-Cr-Mo, alloy case-hardening steels that are used in the carburized or carbonitrided, and subsequently quench hardened and tempered, condition. These steels are, in general, used for medium-size case-hardened parts requiring high fatigue strength and wear resistance. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on forming, heat treating, and joining. Filing Code: SA-866. Producer or source: Lucefin S.p.A..

LUCEFIN GROUP 16MnCr5 (1.7131), 16MnCrS5 (1.7139)

Alloy Digest ◽  
2020 ◽  
Vol 69 (8) ◽  
Keyword(s):  
Wear Resistance ◽  
Fatigue Strength ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
High Wear Resistance ◽  
Medium Size ◽  
Case Hardening ◽  
Low Carbon

Abstract Lucefin Group 16MnCr5 and 16MnCrS5 are low-carbon, 1.2Mn-1Cr, alloy case-hardening steels that are used in the carburized or carbonitrided, and subsequently quench hardened and tempered condition. In general, these steels are used for small and medium size parts requiring high wear resistance and fatigue strength. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on forming, heat treating, machining, and joining. Filing Code: SA-864. Producer or Source: Lucefin S.p.A.

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