
第43卷第1期 Vol. 43No. 1
摩擦与润滑
假压技木
FORGING & STAMPING TECHNOLOGY
基于优化锥形锻造法的热锻润滑剂性能评价
陈伦强,郑俊涛2,庄晓伟2,胡成亮!,赵震!
(1.上海交通大学模具CAD国家工程研究中心,上海200030;
2.江苏龙城精锻有限公司,江苏常州213100)
2018年1月 Jan.2018
摘要: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1050C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追较差。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面增大,两种非解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。关键词:锥形锻造法;润滑剂;润滑性能;高度指标;载荷指标;热锻;粘度 DOI: 10. 13330/j. issn. 1000-3940. 2018. 01. 026
中图分类号:TG316
文献标识码:A
文章编号:1000-3940(2018)01-0154-06
Evaluation of lubricatingperformanceforhot forging lubricantbased on
optimized cone-forging method
Chen Lunqiang,Zheng Juntao’,Zhuang Xiaowei’,Hu Chengliang,Zhao Zhen
(1. National Engineering Research Center of Die & Mold CAD, Shanghai Jiao Tong University , Shanghai 200030, China;
2. Jiangsu Longcheng Precision Forging Co. , Lid. , Changxhou 213100, China)
Abstract : The lubricating performance of four kinds of solid matrixes contents and diferent contents of water-based thermoformed lubri-cants were evaluated by the optimized cone-forging method, and the values of -indicator and F-indicator reflecting the lubricating per-formance of lubricant at 950 °C and 1050 °C 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 perfomances 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 perfomance and good process suitability, However, the lubrieating performances of lubricants with artificial gnaphite to be the matris are generally poor. Therefore, when two kinds of lubricants with high solid content in stock solution are forged at 950 °C , their lubricating per-formanxes 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 °C is 1: 20. The greater the viscosity of lubricant stock solution is, the better the lubricating performanxe: is Key words : cone-forging method; lubricant; lubricating performance; height indicator; load indicator; hot forging; viscosity
金属塑性成形过程中的润滑对降低成形载荷与延长模具寿命具有十分重要的意义"],良好的润滑有利于脱模,提高锻件变形和组织性能的均匀性,改善银件表面质量,降低成形载荷2]。常用润滑剂
收稿日期:20170719;修订日期:20171004 基金项目:国家自然科学基金资助项目(51475294)
作者简介:陈伦强(1991-),男,额土研究生 E-mail: chenlumqiang@ sjta. edu, cn
通讯作者:赵震(1972-),男,博士,教授万方数据il;zhao@ sjtu.edu.cn
按照其工作中的物质状态可以分为润滑油、润滑脂和固体润滑剂。其中,固体润滑剂的润滑机理主要是通过化学镀或喷涂的方法进行涂覆,并在摩擦表面形成固体润滑膜,使摩擦发生在润滑剂内部,并防止材料表面的直接接触。固体润滑剂通常具有很低的剪切强度,可以显著减少摩擦、降低磨损[3]。
为便于喷涂和提高润滑性能,热锻润滑剂通常由3部分组成:主要起润滑作用的基体、载体溶剂和改善润滑剂综合性能的添加剂,如极压剂、增粘剂和抗氧化剂等。石墨、二硫化钼和复合硬脂酸盐