Comparison of Oxidation Stability and Quenchant Cooling Curve Performance of Soybean Oil and Palm Oil

The potential use of vegetable oil-derived industrial oils continues to be of great interest because vegetable oils are relatively non-toxic, biodegradable, and they are a renewable basestock alternative to petroleum oil. However, the fatty ester components containing conjugated double bonds of the triglyceride structure of vegetable oils typically produce considerably poorer thermal-oxidative stability than that achievable with petroleum basestocks under typical use conditions. Typically, these conditions involve furnace loads of hot steel (850 °C), which are rapidly immersed and cooled to bath temperatures of approximately 50-60 °C. This is especially true when a vegetable oil is held in an open tank with agitation and exposed to air at elevated temperatures for extended periods of time (months or years). This paper will describe the thermal-oxidative stability and quenching performance of soybean oil and palm oil and the resulting impact on the heat transfer coefficient. These results are compared to typical fully formulated, commercially available accelerated (fast) and an unaccelerated (slow) petroleum oil-based quenchants.     

A multivariate normal boundary intersection PCA-based approach to reduce dimensionality in optimization problems for LBM process

Engineering with Computers - Laser beam machining (LBM) is a promising manufacturing process that exhibits several desirable quality characteristics. Given a large number of objective functions,...     

防老化剂对大豆油和棕榈油基淬火剂耐氧化性和淬火冷却性能的影响(英文)

尽管以往已有过关于多种植物油的淬火冷却性能的报道,但有关防老化剂对这些油的耐氧化性和初期淬火冷却性能的影响的报道却不多见。本文评估了两种饱和度有很大差异的常用油即大豆油和棕榈油,其相对耐氧化性对淬火冷却性能的影响,并测定了常用的市场有售的常用防老化剂对这些油的防老化效果。除了测定相对耐氧化性外,还通过冷却曲线分析进一步评述了防老化剂对大豆油和棕榈油的初期淬火冷却性能的影响。