Results 251 to 260 of about 999,147 (302)
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2005
Abstract Precision forging is defined as a closed-die forging process in which the accuracy of the shape, dimensional tolerances, and surface finish exceed normal expectations to the extent that some of the postforge operations can be eliminated.
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Abstract Precision forging is defined as a closed-die forging process in which the accuracy of the shape, dimensional tolerances, and surface finish exceed normal expectations to the extent that some of the postforge operations can be eliminated.
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Analysis of center burst during hot forging
Practical Failure Analysis, 2002Abstract Carbon steel axle forgings were rejected due to internal cracks observed during final machining. To determine the cause of the cracks, the preforms of the forging were analyzed in detail at each stage of the forging. The analysis revealed a large central burst in the intermediate stage of the forging preform, which subsequently ...
B. Vamsi Krishna, R.K. Sidhu
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Materials Science
This work concerns the analysis of the application of the nitriding process to forging dies used for the production of automative forgings on a hammer. The subject technological process concerns the production of forgings of a ring section made of AISI ...
M. Hawryluk +6 more
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This work concerns the analysis of the application of the nitriding process to forging dies used for the production of automative forgings on a hammer. The subject technological process concerns the production of forgings of a ring section made of AISI ...
M. Hawryluk +6 more
semanticscholar +1 more source
2005
Abstract This article discusses the operation of upset forging machines and selection of the machine size. It describes several types of upsetter heading tools and their materials. The article reviews the cold shearing and hot shearing methods for preparing blanks for hot upset forging.
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Abstract This article discusses the operation of upset forging machines and selection of the machine size. It describes several types of upsetter heading tools and their materials. The article reviews the cold shearing and hot shearing methods for preparing blanks for hot upset forging.
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Choosing optimal forging conditions in isothermal and hot-die forging
Journal of Applied Metalworking, 1985A process-model was developed based on the slab-method to calculate stress distributions and strains. The heat transfer problem was analyzed using FEM-methods and simplified by using non-dimensional analysis. The process-model could then be expanded with heat transfer calculations between billet and die.
C. R. Boër, H. Rydstad, G. Schröder
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Grain evolution during hot forging
AIP Conference Proceedings, 2013A review on grain evolution during hot forging is presented in this paper. The discussion focus is on the experimental law, the microscopic mechanism, the physical model and the evolution equations of grain refinement and growth. This is because the grain evolution is the most important microstructure evolution effecting on the part mechanical ...
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Soviet Powder Metallurgy and Metal Ceramics, 1987
Use of lubricants 2, 3, 4 and 5 (Table 1) in transverse hot densification does not prevent buildup formation on the tool. By contrast, the specially developed molybdenum disulfide and graphite base lubricant 1 [13] exhibits excellent friction- and wear-reducing characteristics.
Yu. G. Dorofeev +3 more
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Use of lubricants 2, 3, 4 and 5 (Table 1) in transverse hot densification does not prevent buildup formation on the tool. By contrast, the specially developed molybdenum disulfide and graphite base lubricant 1 [13] exhibits excellent friction- and wear-reducing characteristics.
Yu. G. Dorofeev +3 more
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Forging of Ingots Without Hot Tops
Materials and Manufacturing Processes, 2013Geometric parameters of the shrinkage cavities in ingots without hot tops from the NKMZ and “Izhorskie zavodi” plants varying in mass from 1.6–180 tons with different ingot height to average diameter ratio have been studied. The influence of geometric parameters, solidification conditions, and steel chemical composition on the relative depth of the ...
Iaroslav G. Zhbankov, Alexander V. Perig
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The International Journal of Advanced Manufacturing Technology, 2023
Satoshi Kitayama +5 more
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Satoshi Kitayama +5 more
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Lubrication in hot die forging processes
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 2018This article presents selected aspects of lubricant application, as well as lubrication methods and devices in the context of forging tool durability and accessories used in die forging processes at elevated temperatures. The properties and applications of the currently used lubricating and cooling agents in selected industrial forging processes were ...
Marek Hawryluk, Jacek Ziemba
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