Abstract At present, a tokamak divertor 1 is being developed with a reservoir for feeding the receiving surface with liquid metal, and real designs with high reliability and a long service life are being created. There is therefore a need to develop methods for combining dissimilar materials. The aim is for the unit of the adapter to use a brazed joint between the molybdenum tube and the steel (12Cr18Ni10Ti). This article deals with the development of a method for obtaining a durable, heat-resistant and sealed joint between molybdenum and corrosion-resistant 12Cr18Ni10Ti steel. A paste based on STEMET 1301A filler metal is used for brazing. Modelling of the complex stress that occurs in assemblies during brazing is carried out using ANSYS software. The technology required for assembly of the product is developed, which provides the most uniform seam for the chosen brazing regime. The distributions of equivalent stresses in the assembly are calculated for this geometry, and a region of predominantly plastic deformation is also revealed. The brazed samples were tested for heat resistance. Heating to a temperature of 360 °C was carried out, followed by cooling (20 cycles). Before and after thermal cycling, the brazed joints were tested for impermeability using a helium leak detector. The prototypes successfully passed the test without disrupting the continuity. To determine the mechanical characteristics of the brazed joint, the microhardness of the seam region was measured and shear tests were performed. It is shown that the strength characteristics strongly depend on the size of the gaps between the parts to be brazed. For specimens collected with the optimum gap, the shear strength is 500 ± 50 MPa.

中文翻译：

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用于连接钼与钢 12CR18NI10ТI 的填充金属 STEMET 1301A 的实验和数值分析

摘要 目前，托卡马克偏滤器 1 正在开发中，其带有用于向接收表面供给液态金属的储液器，并正在创造具有高可靠性和长使用寿命的真实设计。因此需要开发用于组合不同材料的方法。目的是使适配器单元在钼管和钢 (12Cr18Ni10Ti) 之间使用钎焊接头。本文讨论了一种在钼和耐腐蚀 12Cr18Ni10Ti 钢之间获得耐用、耐热和密封接头的方法的开发。基于 STEMET 1301A 填充金属的焊膏用于钎焊。使用 ANSYS 软件对钎焊期间组件中出现的复杂应力进行建模。开发组装产品所需的技术，这为所选的钎焊方式提供了最均匀的接缝。针对这种几何结构计算了组件中等效应力的分布，并且还揭示了主要塑性变形的区域。测试钎焊样品的耐热性。加热至 360°C，然后冷却（20 个循环）。在热循环之前和之后，使用氦检漏仪测试钎焊接头的不渗透性。原型成功通过了测试，而不会破坏连续性。为了确定钎焊接头的机械特性，测量了接缝区域的显微硬度并进行了剪切试验。结果表明，强度特性很大程度上取决于待钎焊部件之间的间隙大小。