论文部分内容阅读
传统上,矿物油是常用淬火剂中最重要的一类淬火剂。然而,它们在本质上缺乏环保性,又有毒性,再从长期低价供应角度考虑,有必要寻找新的替代介质。石油制品油的淬火特性与其成分很有关系,因而受其氧化降解性能的限制。由于不断暴露在钢与油接触面间相对较高的温度中,石油制品油遭受热降解和氧化降解,使得其淬火特性发生明显变化。因此,淬火特性是任何一种可选择的淬火介质都必须要检验的一个非常重要的性能参数。可供选择的一类液态物质为植物油,它们具有典型的生物降解特性并且无毒。然而,植物油具有相对较差的抗氧化稳定性能,因此测定氧化对其淬火特性的潜在影响具有重要意义。本文报导的结果仅是这项巨大研究中的第一步,在这项工作中,对不受禁止的植物油的试验是在实验室设备上进行的,以前报告的促使石油制品油早期氧化的过程接近实际使用条件。依照ASTMD6200标准,使用粘度计、红外线分光镜、13CMR分光镜以及冷却曲线特性测定方法对所研究的液态植物油进行了性能检测并和典型的石油制品油作了成分比较。所得的结果表明,作为淬火介质,植物油是有前景的石油制品油的替代品,但在商业上要可行,同时必须使用适当的抗氧化剂。
Traditionally, mineral oil is the most important class of quenchant used in commonly used quenchants. However, they are inherently less environmentally friendly and toxic. From the perspective of long-term low-cost supply, it is necessary to find new alternative media. Quenching properties of petroleum products are closely related to their composition and are therefore limited by their oxidative degradation properties. Due to the continuous exposure to relatively high temperatures between the steel and the oil interface, the oil products undergo thermal and oxidative degradation, causing significant changes in their quench characteristics. Therefore, quenchability is the most important performance parameter that any optional quench media has to test. A select group of liquid substances is vegetable oils, which have typical biodegradability and are non-toxic. However, vegetable oils have relatively poor antioxidant stability and therefore it is important to determine the potential effects of oxidation on their quench properties. The results reported in this article are only the first steps in this huge study in which testing of non-banned vegetable oils was carried out on laboratory equipment. Previously reported processes that led to the early oxidation of petroleum products Close to the actual conditions of use. According to the ASTMD6200 standard, the properties of the liquid vegetable oil studied were tested using a viscometer, an infrared spectroscope, a 13CMR spectroscope, and a method of measuring the characteristics of the cooling curve, and compared with the typical petroleum products. The results obtained show that as a quenching medium, vegetable oils are promising alternatives to petroleum products but are commercially viable and suitable antioxidants must be used.