不同条件下聚变用316LN不锈钢铠甲的力学性能研究

Study on the mechanical properties of 316LN jacket for fusion under different conditions

ITER计划中纵场线圈采用管内电缆导体结构,简称CICC结构。由于无磁性的奥氏体不锈钢是核聚变反应堆的理想材料,导体铠甲采用的是材质为改良的316LN无缝不锈钢管。ITER TF线圈的CICC导体套管由316LN不锈钢管接而成。再将电缆穿入铠甲中经过冷作硬化后,进行650℃/200h的时效热处理,最终在导体运行期间,温度降至4.2K的液氦温度下服役。对于导体铠甲能否经受以上加工处理,将对聚变用316LN不锈钢铠甲在不同的形变、热处理温度和不同温度下的力学性能进行比较分析。

The field coil of ITER was equipped with tube conductor structure, referred to as CICC structure. As the non - magnetic austenitic stainless steel was the ideal material for nuclear fusion reactors, the conductor armor was made of improved 316 LN seamless stainless steel tube. ITER TF coil CICC conductor sleeve was made of 316 LN stainless steel tube. And then the cable into the armor after cold hardening was again processed by the heat treatment at 650 ~C / 200h. Ultimately in the conductor during the operation, the temperature dropped to 4.2K of liquid helium temperature. The mechanical properties of the deformation, heat treatment temperature and other properties of the conductor armor for fusion were analyzed to see if the conductor armor could withstand the above processes.