在核压力容器钢J_(IC)测试研究中,因放射性工作的特点,希望试样尺寸尽可能小,试样数量尽可能少。试样小的问题我们以前用多试样试验方法已经解决了。单试样试验已有多种方法,但多数对于热室测试难以实现。我们采用的单试样卸载线斜率方法,不需要添加任何设备,在一个试样的P-⊿曲线上根据卸载线斜率的变化,直观地定出试 In the nuclear pressure vessel J_ (IC) test research, due to the characteristics of radioactive work, hope that the sample size as small as possible, the number of samples as little as possible. Small sample problem We used to use multiple test methods have been resolved. There are a variety of methods available for single-sample testing, but most are difficult to achieve for hot-chamber testing. We use a single sample unloading line slope method, without adding any equipment, in a sample P-⊿ curve according to the slope of the unloading line changes, visually determine the test