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在实现四个现代化的进程中,对精密微小加工的要求日益增加,本文就采用电火花加工表面人工缺陷方面作一些初步探索。在断裂力学研究中,常常需要在试样上或构件(如压力容器)上人为的制出表面裂缝(即人工缺陷)进行测试,材料为37SiMnCrMoV 超高强度钢,淬火硬度Rc=60～62。研究的初步目标是在容器上制出如图1所示的表面裂纹,以进行断裂韧度k_(1c) 值的测
In the course of realizing the four modernizations, the requirements for precision machining are increasing day by day. In this paper, some preliminary exploration is made on the EDM surface artificial defects. In the study of fracture mechanics, it is often necessary to make surface cracks (artificial defects) on specimens or components (such as pressure vessels) for testing. The material is 37SiMnCrMoV super high strength steel and the quenching hardness Rc = 60 ~ 62. The initial goal of the study was to produce a surface crack on the container as shown in Figure 1 to measure the fracture toughness k_ (1c)