Abstract：The shape memory effect and connecting behaviors of pipe-joint made form Fe 17Mn-5Si-10Cr-5Ni shape memory alloy were studied systematically. The results show that the recovery ratio reduces with increasing per strain and the maximal recovery strain appears when pre strain is 4%～6%. When pre-strain is 4.5%~8%, the connecting of pipe-joint shows bigger tight force and higher pressure-resistance sealing ability. The shape memory effect, tight force and pressure resistance sealing ability of the pipe joint can improve remarkably with thermal-mechanical training. The recovery ratio and recovery strain reduces with increasing thickness of pipe joint With a reasonable range in thickness of pipe-joint, the tight force and pressure-resistance sealing ability in connecting of pipe joint are higher. With increasing length of jointing, in the connecting of pipe joint the tight force reduces and the pressure resistance sealing ability increases. Pipe-joint structure can change the pressure-resistance sealing ability greatly and with the different structure there is severalfold diversity of pressure-resistance sealing ability in connecting of pipe-joint.
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2001, Vol. 0 
