马氏体淬火用等温分级淬火油的研制与性能研究

发布时间：2018-01-05 13:07

  本文关键词：马氏体淬火用等温分级淬火油的研制与性能研究　出处：《上海交通大学》2015年硕士论文　论文类型：学位论文

  更多相关文章： 马氏体淬火 等温分级淬火油 产品研制 淬火油冷却性能

【摘要】：淬火油在马氏体淬火中起着重要的作用,淬火油的冷却能力直接关系到淬火后过冷奥氏体的组织转变形态,为了尽可能多的在淬火后得到马氏体,需要淬火油具备较高的冷却能力,但是急速冷却会导致淬火后工件变形量增大,对于尺寸精密的部品造成不良影响。为解决此问题,本文研制一种既有一定淬硬能力,又能有效控制形变、可用于马氏体淬火的等温分级淬火油。为了成功的研制出产品,本文采用电子天平、比重计、粘度测试仪、闪点测试仪、冷却性能测试仪等研发、分析设备,对不同粘度的基础油做了测试和分析,并探讨了混合基础油的冷却特性规律,高粘度基础油特性温度高、特性时间短,淬火烈度低,低粘度基础油冷却特性与高粘度基础油正好相反。本文系统的研究了基础油的冷却特性,以及基础油加入添加剂后冷却性能的变化,结果表明,混合油品的最大冷却速度要高于单一油品,高粘度油品的加入,会提升等温分级淬火油的特性温度,缩短特性时间,高、低粘度基础油的混合,使冷却速度出现了800~400℃之间较快,400~300℃之间缓慢的特征。依据此规律,本文共研制了五种产品,并对研制出的产品按照JIS K2242冷却性能测试法A法进行了冷却性能的检测和分析,挑选出了本文最佳研制品M-22,经检测,M-22的物性数据和冷却性能数据符合日本JIS K2242热处理油2类1号油标准,也符合我国石油化工行业SH/T 0564-93热淬火油1号等温分级淬火油标准,实现了在650~400℃温度区间内快速冷却,400℃以下缓慢冷却的目标,研制取得了初步成功。
[Abstract]:Quenching oil plays an important role in martensite quenching. The cooling ability of quenching oil is directly related to the microstructure transformation of undercooled austenite after quenching, in order to obtain martensite as much as possible after quenching. Quenching oil is required to have a high cooling capacity, but rapid cooling will lead to an increase in workpiece deformation after quenching, which will have a negative impact on precision parts. In this paper, a kind of austempered oil, which can be used for martensite quenching, has been developed, which not only has certain hardening ability, but also can control deformation effectively. In order to develop the product successfully, the electronic balance and hydrometer are used in this paper. The viscosity tester, flash point tester, cooling performance tester and so on were developed and analyzed. The different viscosity base oil was tested and analyzed, and the cooling characteristics of mixed base oil were discussed. The characteristic temperature of high viscosity base oil is high, the characteristic time is short, the quenching intensity is low, and the cooling characteristic of low viscosity base oil is opposite to that of high viscosity base oil. The results show that the maximum cooling rate of the mixed oil is higher than that of the single oil, and the characteristic temperature of the isothermal quenching oil will be increased with the addition of high viscosity oil. The mixing of characteristic time, high viscosity and low viscosity base oil makes the cooling rate appear faster and slower between 800 鈩，

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