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首页> 外文会议>International Conference on Materials and Products Manufacturing Technology >EXPERIMENTAL CORRELATION BETWEEN METALLURGICAL PARAMETERS, HARDNESS AND MACHINABILITY OF 319 Al-Si-Cu-Mg ALLOYS
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EXPERIMENTAL CORRELATION BETWEEN METALLURGICAL PARAMETERS, HARDNESS AND MACHINABILITY OF 319 Al-Si-Cu-Mg ALLOYS

机译：319 Al-Si-Cu-Mg合金的冶金参数，硬度和加工性之间的实验相关性

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摘要

An attempt has been made to quantify the effects of alloying elements and aging parameters on the hardness and machinability of heat-treated 319 alloys containing α-Fe or β-Fe intermetallics An understanding of these parameters would help in selecting the metallurgical conditions required to achieve the optimum and maximum productivity at high speed machining. Hardness measurements were carried out on specimens prepared from 319 alloys in the as-cast and heat-treated conditions, using different combinations of grain refining, Sr-modification, and alloying additions. Aging treatments were carried out at 155°C, 180°C, 200°C, and 220°C for 4 h, followed by air cooling, as well as at 180°C and 220°C for 2, 4, 6, and 8 h to determine conditions under which specific hardness levels could be obtained. Statistical design of experiments is a satisfactory method for quantifying the effect of various parameters. Experimental correlations of the results obtained from the hardness measurements are analyzed and correlations that relate the alloying additions and heat treatment to the hardness of such alloys are found. Two levels of magnesium content (%Mg), volume fractions of the Fe-intermetallics (%V.F), Sr-modification (Sr-ppm), aging parameters (temperature and time) were tested: 0.1% and 0.28% for Mg, 2% and 5% for Fe-intermetallics (%V.F), 0-ppm and 200-ppm for Sr-modification, 180°C and 220°C for aging temperature and 2h. and 8h. for aging time. Experimental correlations between the metallurgical parameters and the machinability values obtained were analyzed. For this, two levels of Mg (0.1 and 0.28 wt%), Fe-intermetallics (2% and 5%), and two aging temperatures (180°C and 220°C) and aging time of 2h were selected.
机译：已经尝试量化了合金元素和老化参数对含有α-Fe或β-Fe金属间金属间金属间的热处理319合金的硬度和加工性的影响，了解这些参数的理解将有助于选择所需的冶金条件高速加工时的最佳和最大生产率。使用不同组合的晶粒精炼，SR改性和合金化合物，在由319合金中制备的标本上进行硬度测量。老化处理在155℃，180℃，200℃和220℃下进行4小时，然后在空气冷却，以及180℃和220℃下进行2,4,6，和8小时确定可以获得特定硬度水平的条件。实验的统计设计是一种令人满意的方法，用于量化各种参数的效果。分析了从硬度测量获得的结果的实验​​相关性，并发现了将合金化添加剂和热处理与这种合金硬度相关的相关性。测试了两种水平的镁含量（％Mg），Fe-Meterallics（％VF），SR改性（SR-PPM），老化参数（温度和时间）的体积分数：Mg，2的0.1％和0.28％ Fe-Meterallics（％VF），0-PPM和200-PPM的％和5％用于SR改性，180°C和220℃，用于老化温度和2小时。和8h。对于老化时间。分析了冶金参数与所得加工值之间的实验相关性。为此，选择两种水平的Mg（0.1和0.28重量％），Fe-金属间金属间（2％和5％）和两个老化温度（180℃和220℃）和2小时的老化时间。

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