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首页> 外文期刊>The International Journal of Advanced Manufacturing Technology >The influence of soak temperature and forging lubricant on surface properties of steel forgings
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The influence of soak temperature and forging lubricant on surface properties of steel forgings

机译：浸泡温度和锻造润滑剂对钢锻件表面性质的影响

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A small series of ring compression tests were performed on BS970:708M40 alloy steel. The samples were tested using a 2-factor temperature variable, and a 4-factor lubricant variable, as the design parameters. Two differing soak temperatures were used, namely 1030 degrees C and 1300 degrees C respectively. The lubricants applied at the billet to tooling interface were synthetic water-based, graphite water-based, graphite and molybdenum disulphide viscous grease, and finally, unlubricated samples were tested. The ring compression tests were performed using a traditional drop forging hammer and induction heating to minimise any unintentional process variability. The impact that the two varying process parameters have upon the compression sample was then assessed by measuring each sample's surface hardness and surface roughness prior to and post forging with fully calibrated equipment. It was demonstrated that the higher soak temperature of 1300 degrees C yielded a lower surface hardness value and higher surface roughness than the lower soak temperature, 1030 degrees C. The two water-based lubricants offered negligible change in results compared with the unlubricated forging, strongly suggesting that the lubricants were evaporated off the surface prior to forging. However, the results from the graphite-molybdenum disulphate grease do indicate in particular higher surface roughness than other lubricants, and a non-symmetric distortion pattern.
机译：对BS970:708M40合金钢进行了一系列小型环压缩试验。使用2因素温度变量和4因素润滑剂变量作为设计参数对样品进行测试。使用了两种不同的浸泡温度，分别为1030摄氏度和1300摄氏度。在坯料与模具的界面上使用的润滑剂为合成水基、石墨水基、石墨和二硫化钼粘性润滑脂，最后对未润滑的样品进行了测试。使用传统的落锤和感应加热进行环压缩试验，以最大限度地减少任何无意的工艺变化。然后，通过使用完全校准的设备在锻造前后测量每个样品的表面硬度和表面粗糙度，评估两个不同工艺参数对压缩样品的影响。结果表明，与较低的浸泡温度1030°C相比，较高的1300°C浸泡温度产生较低的表面硬度值和较高的表面粗糙度。与无润滑锻造相比，两种水基润滑剂的结果变化可忽略不计，强烈表明润滑剂在锻造前从表面蒸发。然而，石墨二硫化钼润滑脂的结果确实表明，与其他润滑剂相比，石墨二硫化钼润滑脂的表面粗糙度更高，并且呈现非对称变形模式。

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