前言等温锻造法(Isothermal forging)镍基、钛基合金等难加工材料成形方法的发展趋势,这一方法利用了微细晶粒的超塑性。采用这种方法,有可能在一个工序内完成从简单形状的预成形到准净尺寸精成形的加工。不过,现已发现,具有超塑性的被加工材料,比如镍基合会,即使处在超过1000℃的高温,变形速度也属于低速范围,所以,使用温度与被加工材料 Preface Isothermal forging Nickel-based, titanium-based alloys and other difficult-to-process material forming method development trend, this method uses the fine grain superplasticity. With this method, it is possible to finish the process from simple shape preform to quasi-net size finishing in one process. However, it has been found that a superplastic material to be worked, such as a nickel-based alloy, has a low deformation rate even at a high temperature of over 1000C. Therefore, the use temperature and the material to be processed