Abstract:
Described in the essay is the developments concerning the manufacture technologies for the nuclear power reactor coolant pipe as made both at home and abroad.It is pointed out that at present the process as used at home for making the third generation coolant pipe is first forging the solid electroslag remelting ingot，and then boring the shaped piece with mechanical method.Addressing the disadvantages concerning the conventional manufacturing process for the coolant pipe，i.e.，poor material utilization rate，rather long production cycle and product quality inconsistency，etc.，the orientation of technological improvement is discussed.The result of relevant analysis leads to such a forecast that the hollow forging process using the centrifugally-cast hollow ingot or the electroslag remelting hollow ingot as the blank will eventually replace the currently-employed solid billet forging process.
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