中文摘要：

为有效地消除心部空洞，提高楔横轧轴件的机械性能，提出利用高压气体压实楔横轧轴件心部空洞的新方法，简称浮压法。利用DEFORM-3D有限元软件，研究了浮压法实现轴件心部空洞闭合的机理和工艺参数的影响规律。结果表明：心部空洞闭合的条件是高温轴件应受三向压应力、负平均应力和较大的剪应力共同作用；气压或轴件温度越高，空洞闭合就越快，但对轴件外形尺寸几乎没有影响。

英文摘要：

In order to effectively eliminate the core void and improve the mechanical properties of CWR shaft, a new method with high-pressure gas to compact CWR shaft core void, briefly called floating-pressure method, is put forward. The mechanism of void closure and the influence law of the processing parameters is investigated with DEFORM-3D. The results show the condition of core void closure is that the high-temperature shaft should be subjected via three directional compressive stress, negative mean stress and large shear stress; the higher the gas pressure or the shaft temperature is, the more quickly the void close, but there is the slight effect on the shafts＇ shape and size.