基于优化锥形锻造法的热锻润滑剂性能评价

Evaluation of lubricating performance for hot forging lubricant based on optimized cone-forging method

使用优化锥形锻造法对4种固体基体成分和含量不同的水基热成形润滑剂的润滑性能进行评价,得到了表征润滑剂润滑性能的H指标和F指标在950和1050 ℃条件下以及润滑剂原液和水按照体积比分别为1：60, 1：20和1：4.5这3种调配方案下的值.试验结果表明,优化锥形锻造法能够辨别不同润滑剂在不同条件下的性能差异.以复合硬脂酸盐为基体的润滑剂在不同条件下的润滑性能都较优,润滑性能稳定,工艺适用性好;而以人工石墨为基体的润滑剂的润滑性能普遍较差.原液中固体物含量较高的两种润滑剂在950 ℃锻造时,其润滑性能随着原液含量的增高而增大,两种非鳞片型石墨基润滑剂在1050 ℃ 锻造时的最佳配比为1：20;润滑剂原液的粘度越大,润滑性能越好.

The lubricating performance of four kinds of solid matrixes contents and different contents of water-based thermoformed lubri-cants were evaluated by the optimized cone-forging method, and the values of H-indicator and F-indicator reflecting the lubricating per-formance of lubricant at 950 ℃ and 1050 ℃ with the volume ratios of lubricant and water of 1：60,1：20 and 1：4.5 were obtained. The results show that the optimized cone-forging method can indicate different lubricating performances of lubricants under varied conditions,and the lubricating performances of lubricants with compound stearate to be the matrix are the best under different conditions with stable lubrica-ting performance and good process suitability. However,the lubricating performances of lubricants with artificial graphite to be the matrix are generally poor. Therefore,when two kinds of lubricants with high solid content in stock solution are forged at 950℃,their lubricating per-formances increase with the concentrations of stock solution. The optimal volume ratio of two kinds of lubricants with non-scale graphite to be the matrix forged at 1050 ℃ is 1：20. The greater the viscosity of lubricant stock solution is,the better the lubricating performance is.