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一、前言众所周知,用简单易行的夏比V型冲击能(CVN)换算复杂的断裂韧性值K_(Id)或K_(Ic)在工程上有重要的意义。因此,许多人从事这方面的研究工作。在不同回火温度条件下,我们从理论上建立了断裂韧性的换算模型。 K_((Id)~2)/E=α(CVN—β) (1)本文的主要工作是对上式进行试验验证,并建立适合于试验用钢工程上的定量关系式。二、试验过程 1.材料与试样试验选用28Cr2MoVA钢,其化学成分列于表1,热处理规范列于表2。采用三点弯曲试样B×W=20×24mm;α/W=0.4～O.6;S=4W。冲击试样为10
I. Preface As we all know, the simple calculation of Charpy V-type impact energy (CVN) to calculate the complex fracture toughness value K_ (Id) or K_ (Ic) is of great significance in engineering. Therefore, many people are engaged in research work in this area. In different tempering temperature conditions, we have established a theoretical model of fracture toughness conversion. K _ (Id) ~ 2) / E = α (CVN-β) (1) The main work of this paper is to verify the above formula and to establish a quantitative relationship suitable for experimental steel engineering. Second, the test process 1 material and sample test selected 28Cr2MoVA steel, the chemical composition is shown in Table 1, heat treatment specifications are shown in Table 2. A three-point bending test specimen B × W = 20 × 24 mm; α / W = 0.4 to 0.6; S = 4W. The impact specimen is 10