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本文评价了二级核反应堆容器钢(16MnHR)的动态和静态启裂韧性(K_(Id)K~Ia、K_I~Jc等)。采用落锤试验(DWT),动态撕裂(DT),落锤撕裂(DWTT)和C_v等方法研究了这一钢种的脆性转变特性,得到了不同样品厚度和缺口尖度的无延性转变温度(NDTT)及本钢种的RT_(NDT)。同时,在温度为0℃研究了变形量对C_v能量,断口剪切百分比(％S_A),横向扩张量(LME)的影响。结果表明,16MnHR钢比同类材料(16MnR,控轧16MnR等)有较高的韧性,而NDTT低15～20℃。
This paper evaluates the dynamic and static cracking toughness (K_ (Id) K ~ Ia, K_I ~ Jc, etc.) of the secondary nuclear reactor vessel steel (16MnHR). The brittle transition characteristics of this steel were studied by using DWT, DT, DWTT and C_v, and the ductile transition of different sample thickness and notch sharpness was obtained. Temperature (NDTT) and the original steel species RT_ (NDT). At the same time, the effect of deformation on the C_v energy, the percentage of shear fracture (% S_A) and the transverse expansion (LME) was studied at a temperature of 0 ℃. The results show that 16MnHR steel has higher toughness than other similar materials (16MnR, controlled rolling 16MnR), while NDTT is 15 ~ 20 ℃ lower.