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Cooling Behavior of A356 Alloy in Surfactant Quenching Medium

机译:表面活性剂淬火介质A356合金的冷却行为

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摘要

In this study, the cooling behavior of Sr-modified A356 alloy aluminum wheels produced by low-pressure die-casting technology was investigated in different quenching mediums. Water and surfactant quenchants were used in order to determine the cooling rate and mechanical properties of the alloy. A thermocouple was attached to the wheels, and parts were immersed into different quenching mediums after solution treatment. Data were collected by using a data logger. Tensile test and hardness test were carried out in order to determine the effect of quenching step on mechanical properties. Statistical analysis was performed, and graphics were drawn with Minitab. Maximum cooling rates throughout the quenching were obtained, respectively, 61-68-70-85 degrees C/s at SDS, Triton X-100, Tween 20 and water quenching medium. It was found that 61 degrees C/s is enough to suppress precipitation for artificially aging, and the cooling rate at Leidenfrost point is the most important parameter for correlation with mechanical properties. According to the hypothesis analysis, only yield strength values were affected by the quenching rate at LDP statistically.
机译:在该研究中,在不同的淬火介质中研究了由低压压铸技术生产的SR改性A356合金铝轮的冷却行为。使用水和表面活性剂猝灭剂以确定合金的冷却速率和机械性能。将热电偶连接到车轮上,溶液处理后浸入不同的猝灭介质。使用数据记录器收集数据。进行拉伸试验和硬度试验,以确定淬火步骤对机械性能的影响。进行统计分析,用minitab绘制图形。在SDS,Triton X-100,吐温20和水猝灭介质中,分别获得整个猝灭的最大冷却速率。结果发现,61摄氏度足以抑制人工老化的沉淀,莱森弗罗斯特点的冷却速率是与机械性能相关的最重要参数。根据假说分析,只有屈服强度值统计上LDP的猝灭率。

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