华龙一号反应堆压力容器材料高温性能试验研究  

Experimental Study on High Temperature Properties for HPR1000 Reactor Pressure Vessel Material

作　　者：杨立才[1] 罗英[1] 邱天[1] 郑浩 曾鹏[1] YANG Licai;LUO Ying;QIU Tian;ZHENG Hao;ZENG Peng

机构地区：[1]中国核动力研究设计院<核反应堆系统设计技术国家级重点实验室>,成都610213

出　　处：《科技视界》2020年第13期124-127,共4页Science & Technology Vision

摘　　要：目前对于华龙一号反应堆压力容器用国产16MND5材料,缺少堆芯熔融条件下的高温性能数据。本论文利用取自华龙一号反应堆压力容器下封头延伸段的国产16MND5材料,开展了一系列高温弹性、拉伸及持久试验,获得了16MND5材料的高温弹性、拉伸、持久性能数据及变化规律;同时采用最小二乘法,结合高温持久试验数据,推导获得了不同温度下的持久强度方程。结果表明:16MND5材料的弹性模量、屈服强度和抗拉强度随温度升高而降低,在900℃至1000℃区间,材料已进入软化状态,其变化渐缓;此外,在600℃至700℃、900℃至1050℃温度区间,16MND5材料在同一断裂时间的持久强度随温度升高而降低,但在组织相变温度区间(即750℃至850℃),持久强度方程斜率关系为800℃>750℃> 850℃,且该三个温度下的持久强度在断裂时间约为5小时时存在相交情况。At present, it is still short of high temperature properties data under the condition of core melting for domestic 16 MND5 material of RPV. We perform a series of high temperature elasticity, tensile and rupture tests using domestic 16 MND5 material cut from lower dome extension of HPR1000 RPV in this paper. High temperature elasticity, tensile, rupture properties data and change rules are obtained for 16 MND5 material. Furthermore, combining the rupture test data, rupture strength equations for different temperatures are deduced by the least square method. The results show that the elastic modulus, yield strength and tensile strength of the 16 MND5 material decrease with the increase of temperature. In the range from 900 ℃ to 1000 ℃, the material has entered the softening state, and the change is gradually slowed down. In addition, in 600 ℃ to 700 ℃, 900 ℃ to 1050 ℃temperature range, the rupture strengths of 16 MND5 materials under the same fracture time decrease with temperature rise, and but in the phase transition temperature range( 750 ℃to 850 ℃), the relationship of rupture strength equation slope is 800 ℃ > 750 ℃ > 850 ℃,and rupture strengths of three temperatures intersect when the fracture time is about 5 hours.

关 键 词：严重事故 国产16MND5材料 高温拉伸 持久强度 

分 类 号：TG115.5[金属学及工艺—物理冶金]