Utilization of sulphurized palm oil as cutting fluid base oil for broaching process
Utilization of sulphurized palm oil as cutting fluid base oil for broaching process
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DOI：
10.1088/1755-1315/60/1/012008
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发表时间：
2017-05
期刊：
影响因子：
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通讯作者：
Sukirno;Y. Ningsih
中科院分区：
文献类型：
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作者：
Sukirno;Y. Ningsih
拉削是最苛刻的金属切削操作之一，需要使用含有极压（EP）添加剂的切削液，以最大限度地减少金属与金属之间的接触并提高刀具寿命。通过添加含硫化合物可以提高切削液的极压性能，所述含硫化合物将允许形成具有低剪切强度和良好抗焊接性能的金属硫化物膜，并作为防止磨损和咬合的保护层。大多数切削液都是矿物油基的。然而，考虑到健康和环境问题，近年来对植物油基切削液的研究有所增加。本文报道了棕榈油衍生物的硫化及其用作拉削油的研究。棕榈油衍生物的硫化通过非催化硫化进行，使用元素硫在各种组成下并在150-160°C下加热3小时。通过将硫化棕榈油和添加剂包混合来制备拉削油。考察了拉削油的承载能力、磨斑直径、防腐蚀性、氧化安定性和工件表面光洁度等性能参数。研究发现，硫化FAME基拉削油具有优良的极压性能。通过实验确定了最佳配方，即硫含量为6%的硫化FAME-矿物油。实验结果表明，硫化棕榈油的运动粘度约为25.3cSt（在40 °C下），承载能力为400 kgf，并且磨痕直径为0.407 mm。此外，可以得出结论，改性棕榈油的防腐蚀等级为1。（轻微失泽类别），在160 °C下获得0.11小时的氧化稳定性，并且工件的表面粗糙度约为0.0418-0.0579 μm。这些性能可与商用拉削油相媲美。结果表明，硫化棕榈油可用于工业切削液配方。
Broaching is one of the most severe metal cutting operation that requires the use of cutting fluids formulated with extreme pressure (EP) additives to minimize metal-to-metal contact and improve tool life. Enhancement of EP performances of the cutting fluids can be achieved by addition of sulphur containing compounds that will allow the formation of metal sulfide film that has low shear strength and good antiweld properties and acts as protection layer from wear and seizure. Most of the cutting fluids are mineral oil based. However, as regards to health and environmental issues, reseach on vegetable oil based cutting fluid have been increased recently. This paper reports a study on the sulphurization of palm oil derivatives and its usage as broaching oil. Sulphurization of the palm oil derivative was conducted via non-catalytic sulphurization using elemental sulphur at various composition and under heating of 150-160°C for 3 hr. Broaching oil was made by blending the sulphurized palm oil and additive packages. The performance parameters of the broaching oil that has been observed including load carrying capacity, wear scar diameter, corrosion protection, oxidative stability, and surface finish of workpiece. From this research, it was found that sulphurized FAME based broaching oil has excellent EP properties. The optimum formulation was obtained on composition of sulphurized FAME-mineral oil with 6% wt of sulphur. The result from the test showed that kinematic viscosity of sulphurized palm oil was about 25.3 cSt (at 40 °C), load carrying capacity was 400 kgf, and wear scar diameter was 0.407 mm. In addition, it can be concluded that the class of corrosion protection of modified palm oil was 1.b (slight tarnish category), oxidative stability at 160 °C was obtained for 0.11 hr, and the surface roughness of workpiece was about 0.0418-0.0579 μm. These performances are comparable to commercial broaching oil. By this result, it indicates that sulphurized palm oil is applicable for industrial cutting fluids formulation.