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New Microalloyed Steels for forgings

Journal of Iron and Steel Research International 2011年第S1期18卷 104-111页

作者： Christoph Keul Wolfgang Bleck Department of Ferrous Metallurgy RWTH Aachen UniversityGermany

Microalloyed steels for forging applications have been newly developed in order to increase strength and toughness properties which thereby give the possibility for light weight *** properties of these steels are set up by a controlled cooling directly from the forging heat without an additional heat *** aim can be achieved on the one hand by a further development of precipitation hardening ferritic pearlitic steels (AFP-steel) due to an extended use of microalloying elements (AFP-M steel) and on the other hand by microalloyed steels which employ a bainitic microstructure (HDB steel).To adjust the targeted microstructure the temperature control has to be assured down to approx.500℃ for the AFP-M steels and down to approx.300℃ for the HDB steels.

关键词： forgings bainite microalloying controlled cooling

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New bainitic Steels for forgings

New bainitic Steels for Forgings

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中国金属学会特殊钢分会理事会暨2013年汽车零部件用高品质特殊钢研讨会

作者： C.KEUL V.WIRTHS W.BLECK Department of Ferrous Metallurgy RWTH Aachen University

Steels with a bainitic microstructure offer great possibilities for highly stressed forged *** variety of different bainitic morphologies requests for an aligned thermal treatment after forging in order to achieve the maximum *** dependence of the alloying concept and heat treatment bainite is composed of different microstructural components like the ferritic primary phase and the secondary phase,which consists of either carbides, martensite and/or *** combinations of mechanical properties can thereby be adjusted in these steels,

关键词： forgings bainite heat treatment mechanical properties

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First China Manufacturing Technology Development Forum for Large Castings & forgings

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China Foundry 2006年第4期3卷 338-338页

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Effects of heat treatment on the microstructures and mechanical properties of a new type of nitrogen-containing die steel

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International Journal of Minerals,Metallurgy and Materials 2012年第6期19卷 511-517页

作者： Jing-yuan Li Peng Zhao Jun Yanagimoto Sumio Sugiyama Yu-lai Chen School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China Institute of Radar and Avionics Aviation Industry Corporation of China Suzhou 215151 China Institute of Industrial Science the University of Tokyo Tokyo 153-8505 Japan Engineering Research Institute University of Science and Technology Beijing Beijing 100083 China

Nitrogen can increase the strength of steels without weakening the toughness and improve the corrosion resistance at the same time. Compared with conventional nitrogen-free die steels, a new type of nitrogen-containing die steel was developed with many superior properties, such as high strength, high hardness, and good toughness. This paper focused on the effects of heat treatment on the microstruc- tures and mechanical properties of the new type of nitrogen-containing die steel, which were investigated by the optimized deformation process and heat treatment. Isothermal spheroidal annealing and high-temperature quenching as well as high-temperature tempering were ap- plied in the experiment by means of an orthogonal method after the steel was multiply forged. The mechanical properties of nitro- gen-containing die steel forgings are better than the standard of NADCA #207-2003.

关键词： die steels nitrogen heat treatment microstructure mechanical properties forgings

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