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Assessment of the Microstructure and Mechanical Properties of a Laser-Joined Carbon Fiber-Reinforced Thermosetting Plastic and Stainless Steel

机译:激光加工碳纤维增强热固性塑料和不锈钢微观结构和力学性能的评估

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摘要

The thermosetting plastic and stainless steel were joined with a fiber laser. The influence of processing parameters on the joint was studied. The laser scanning on stainless steel is shown to result in the formation of the heat-affected and fusion zones. In the first zone, lathy ferrite precipitates along the boundary, which modifies austenite, while in the second zone, ferrite forms the skeleton structure and separates austenite into a small cellular structure. The laser joining improves the microstructure of both zones. With an increase in the laser scanning speed and power, the shear strength of the stainless steel/plastic joint first increases and then decreases. A low laser scanning speed or high laser power would overheat polyphenylene sulphide and lead to its decomposition. Those factors would also reduce heat transfer and lead to its insufficient melting. The stainless steel/plastic joint acquires a maximum shear strength at a laser scanning speed of 4-5 mm/s and laser power of 320-350 W.
机译:热固性塑料和不锈钢与光纤激光器连接。研究了加工参数对关节的影响。在不锈钢上的激光扫描显示为导致热影响和融合区的形成。在第一区中,岩浆铁氧体沿着边界沉淀,该边界地改变奥氏体,而在第二区中,铁氧体形成骨架结构并将奥氏体分离成小细胞结构。激光连接改善了两个区域的微观结构。随着激光扫描速度和功率的增加,不锈钢/塑料接头的剪切强度升高,然后减少。低激光扫描速度或高激光功率会过热聚苯硫化物并导致其分解。这些因素还会减少热传递并导致其熔化不足。不锈钢/塑料接头以4-5 mm / s的激光扫描速度获得最大剪切强度,激光功率为320-350W。

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