Tianjin Heavy Industries Research and Development Co.

Tianjin, China

Tianjin Heavy Industries Research and Development Co.

Tianjin, China
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Wang B.-Z.,China First Heavy Industries Fulaerji | Liu Y.,Tianjin Heavy Industries Research and Development Co. | Guo Y.,Tianjin Heavy Industries Research and Development Co. | Liu K.-Q.,Tianjin Heavy Industries Research and Development Co. | And 2 more authors.
Energy Materials 2014, Conference Proceedings | Year: 2014

The AP/CAP Steam Generator has the most complex structure in current nuclear power plant forgings. In order to improve material utilization and nozzle Properties, China First Heavy Industries (CFHI) have carried out the study on profile and blocker-type forging for Channel Head. The numerical and physical Simulations verify that the channel head can be forged step by step in profiling dies with 100∼150MN hydraulic press. The achievement has been applied firstly in the AP1000 project of Xian Ning 1#. On this basis, the optimizations of forging process and die structure have been completed. Through process optimizations above, the nozzles of different shapes have obtained uniform deformation and the full-size channel head forging (Including main forging and samples) of CAP1400 steam generator has been manufactured successfully. And the mechanical properties indicate that the toughness has been improved obviously and the gas content has been reduced effectively in nozzle regions.


Wang B.-Z.,China First Heavy Industries Fulaerji | Liu K.-Q.,Tianjin Heavy Industries Research and Development Co. | Liu Y.,Tianjin Heavy Industries Research and Development Co. | Zhang W.-H.,Tianjin Heavy Industries Research and Development Co. | Zhao D.-L.,Tianjin Heavy Industries Research and Development Co.
Energy Materials 2014, Conference Proceedings | Year: 2014

With the Development of Larger Output and Longer Plant Life for Advanced Pressurized Water Reactor Pressure Vessel (APWRPV), Larger and Mono-bloc Forgings must be Necessary. In the researching and manufacturing of CAP1400RPV forgings, China First Heavy Industries (CFHI) Manufactured Mono-bloc Upper Head with Quick-loc and Mono-bloc Lower Head (Combined Part of Transition Ring and Lower Head),reducing the welding process and the mechanical property deference comparing with the traditional manufacturing, Comparing with AP1000 forgings, not only Obtained better Mechanical Properties, but also Reduced Manufacturing cycle of RPV and Nondestructive in-service Inspection due to Elimination of Weld Seams. CHFI will Development Mono-bloc Nozzle Shell (Combined Part of Vessel Flange,Nozzle Shell and Inlet/Outlet Nozzles) for Future APWRPV.


Zhao M.-L.,Tianjin Heavy Industries Research and Development Co. . Ltd. | Jin J.-Y.,Tianjin Heavy Industries Research and Development Co. . Ltd. | Zhang M.-Z.,Tianjin Heavy Industries Research and Development Co. . Ltd. | Zhang G.-L.,Tianjin Heavy Industries Research and Development Co. . Ltd. | Fan X.-Y.,Tianjin Heavy Industries Research and Development Co. . Ltd.
Journal of Iron and Steel Research | Year: 2014

Different nickel chromium equivalent proportion ultra-supercritical rotor steel ingots were melted by vacuum induction furnace to research the effect of nickel chromium equivalent proportion on precipitation of 8-ferrites. The investigation shows that the precipitation of 8-ferrites is caused by the non-equilibrium phase transformation during cooling of ingots although the composition of alloy is in the standard scope. 8-ferrites were nubby in the cast ingot with high nickel chromium equivalent proportion, and they could be absorbed through recrystallization and extrusion during forging and heat treatment. The quantity of 8-ferrites increased and they were netlike in cast ingot when the nickel chromium equivalent proportion decreased. 8-ferrites became catenulate at grain boundary after forging and heat treatment, and they were difficult to remove. With the nickel chromium equivalent proportion increasing, the impact toughness was improved significantly.

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