The forming principle of double metal clad tube hydraulic expansion is analyzed firstly, after acquired material mechanics performance parameters of the base pipe and liner, this article study the bulging compound criterion of the base pipe and liner.The residual contact pressure stress between base tube and liner is studied.At the end of the paper, the different liner material for bulging residual contact pressure and the influence of compressive stress are studied.These studies provides important basis for practical engineering.%本文首先分析了双金属复合管液胀成形原理,在获得基管和衬管材料力学性能参数的基础上对基管和衬管满足液胀复合判据条件进行了研究;研究了不同胀形压力下基管与衬管残余接触压应力的变化;最后研究了不同衬管材料对胀形压力和残余接触压应力的影响,为双金属复合管液胀成形工程实际提供了重要依据.
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