Optimization of Process Parameters for the Axial Distortion and Distortion Range During Die Quenching of a Spiral Bevel Gear

Journal Article · Wed Aug 15 04:00:00 EDT 2018 · Journal of Materials Engineering and Performance

DOI:https://doi.org/10.1007/S11665-018-3455-Y· OSTI ID:22860358

Zhang, Yingtao ^[1]; Wang, Gang ^[2]; Shi, Wankai ^[3]; Yang, Lin ^[4]; Li, Zhichao ^[5]

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1. Hohai University, College of Mechanical and Electrical Engineering (China)
2. Tsinghua University, Beijing Key Lab of Precision/Ultra-precision Manufacturing Equipments and Control (China)
3. Chongqing University, The State Key Laboratory of Mechanical Transmissions, Department of Mechanical Engineering (China)
4. China FAW Group Corporation (China)
5. DANTE Solutions, Inc (United States)

The strength of high-duty gears can be improved by carburizing and quenching processes. Quenching distortion is inevitable during the process, and it has direct effects on the precision of the gear. For spiral bevel gear with big diameter and small thickness, die quenching process is applied in the manufacturing to control the distortion in axial direction. Die quenching parameters must be optimized to minimize the distortion while considering non-uniformity of chemical compositions and loads. In this paper, material models of gear material (22CrMoH) built based on the phase transformation kinetics, static mechanical properties and phase transformation plasticity equations. Finite element analysis (FEA) models are conducted to study the whole die quenching process based on the production process. Die quenching experiments and testing of microstructures and distortions are conducted to verify the accuracy of the FEA models. The effects of loads and bottom die obliquity on the final distortion are studied to set the appropriate range and control distortion. The distortion was very sensitive to the bottom die obliquity and some part of load ranges. The distortion changes little when the load of inner die was in the range of 1.38-2.07 MPa and the load of outer die was in the range of 2.07-2.76 MPa. The distortion range is fitted the production requirements by setting the inclination angle of bottom die between 0.12° and 0.29°.

• OSTI ID: 22860358
• Journal Information: Journal of Materials Engineering and Performance, Journal Name: Journal of Materials Engineering and Performance Journal Issue: 8 Vol. 27; ISSN 1059-9495; ISSN JMEPEG
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHEMICAL COMPOSITION
CHROMIUM COMPOUNDS
FINITE ELEMENT METHOD
HYDROGEN COMPOUNDS
MICROSTRUCTURE
MOLYBDENUM COMPOUNDS
OPTIMIZATION
PHASE TRANSFORMATIONS
PLASTICITY
PRESSURE RANGE MEGA PA 01-10
TERNARY ALLOY SYSTEMS
THICKNESS