该文对前8届国际塑性加工会议(International Conference on Technology of Plasticity)论文集中锻造方面的文献进行了综述,分析了24年来锻造工艺的发展历程。总结了热锻、温锻和冷锻的技术优缺点和近年来的技术突破。从中可以较充分地...该文对前8届国际塑性加工会议(International Conference on Technology of Plasticity)论文集中锻造方面的文献进行了综述,分析了24年来锻造工艺的发展历程。总结了热锻、温锻和冷锻的技术优缺点和近年来的技术突破。从中可以较充分地了解该技术的一些新的发展动向。展开更多
To understand the forming behaviour of magnesium alloys, the upsetting test of Mg alloys at evaluated temperature was conducted. It is found that Mg alloys are brittle at temperatures below 200 ℃. When temperature is...To understand the forming behaviour of magnesium alloys, the upsetting test of Mg alloys at evaluated temperature was conducted. It is found that Mg alloys are brittle at temperatures below 200 ℃. When temperature is higher than 400 ℃, Mg alloy is not suitable for forging because of heavy oxidation. Mg alloy shows an excellent workability at temperatures from 250 to 400 ℃. Because in warm forging the flow stress decreases with increasing strain, which is so called work softening, no appropriate material formulation is available for Mg alloys. For the evaluation of flow stress of Mg alloys in warm forging processes, a formula is derived by analyzing the stress data measured at various temperatures in upsetting test. It is demonstrated that the formula fits the flow stress obtained from experiment.展开更多
文摘该文对前8届国际塑性加工会议(International Conference on Technology of Plasticity)论文集中锻造方面的文献进行了综述,分析了24年来锻造工艺的发展历程。总结了热锻、温锻和冷锻的技术优缺点和近年来的技术突破。从中可以较充分地了解该技术的一些新的发展动向。
文摘To understand the forming behaviour of magnesium alloys, the upsetting test of Mg alloys at evaluated temperature was conducted. It is found that Mg alloys are brittle at temperatures below 200 ℃. When temperature is higher than 400 ℃, Mg alloy is not suitable for forging because of heavy oxidation. Mg alloy shows an excellent workability at temperatures from 250 to 400 ℃. Because in warm forging the flow stress decreases with increasing strain, which is so called work softening, no appropriate material formulation is available for Mg alloys. For the evaluation of flow stress of Mg alloys in warm forging processes, a formula is derived by analyzing the stress data measured at various temperatures in upsetting test. It is demonstrated that the formula fits the flow stress obtained from experiment.
