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根据脉冲放电对含圆柱形非金属夹杂构件所引起的温度场,将其分解为轴对称温度场和非轴对称温度场两部分,采用热弹性位移势及叠加原理,在给定的边界条件下,分别求解两类温度场所引起的热应力场。以16Mn构件强化为例求解夹杂边界处热应力分布发现,在该区域,无论径向、周向应力均为压应力,而且远超出材料的屈服强度;在温度和应力耦合作用下,将极大影响夹杂附近的组织性能及应力状态。进一步研究沿径向路径的热应力变化发现,脉冲放电引起的热应力仅对含夹杂区域的组织性能及应力状态影响较大,而对无夹杂区域并没有太大影响,因此,该技术可应用于在线构件的强化。
According to the temperature field caused by impulse discharge on cylindrical non-metallic inclusions, it is decomposed into two parts: axisymmetric temperature field and non-axisymmetric temperature field. According to the thermoelastic displacement potential and superposition principle, under the given boundary conditions , Respectively, for solving two types of temperature field caused by thermal stress field. Taking 16Mn component strengthening as an example, the thermal stress distribution at the inclusion boundary is found. It is found that both radial and circumferential stress are compressive stress and far exceed the yield strength of the material in this region. Under the coupling of temperature and stress, Affects inclusions in the vicinity of the organizational performance and stress status. Further study of the thermal stress along the radial path found that the thermal stress caused by the pulse discharge only has a great influence on the microstructure and stress state of the inclusions but not the unincorporated areas. Therefore, this technique can be applied Enhancement of online components.