硬脂酸-醇溶性聚氨酯树脂新型成型剂的应用研究  

Application of a New Pressing Binder Composed of Stearic Acid andAlcohol-Soluble Polyurethane Resin

作　　者：洪海侠[1] 孙翱魁 王德志[1] Hong Haixia;Sun Aokui;Wang Dezhi(School of Materials Science and Engineering,Central South University,Changsha Hunan 410083,China;School of Packaging and Materials Engineering,Hunan University of Technology,Zhuzhou Hunan 412000,China)

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083 [2]湖南工业大学包装与材料工程学院,湖南株洲412000

出　　处：《硬质合金》2023年第5期347-353,共7页Cemented Carbides

基　　金：湖南省自然科学基金资助项目(No.2021JJ30215);湖南省教育厅科学研究项目(No.21A0363)。

摘　　要：本文以聚乙二醇、硬脂酸、醇溶型聚氨酯树脂、二丁酯、硬酯酸聚氧乙烯酯为原料,通过乙醇溶解试验、过筛试验及滚筒试验,开发出一种以硬脂酸与醇溶型聚氨酯树脂为主的新成型剂,两者的质量比为1∶1。新成型剂能够满足现代喷雾干燥工艺要求。与聚乙二醇、石蜡及顺丁橡胶相比,采用新成型剂制备的混合料具有良好的流动性(33 s/25 cm^(3))与较高的松装密度(3.27 g/cm^(3)),压制相同试样条的情况下,具有较低的压制压力(15.5 kN),试样条烧结后具有均匀的微观结构,且烧结后具有较低的残碳量(0.024%),是一种理想的新型硬质合金模压成型剂。In this paper,polyethylene glycol,stearic acid,alcohol-soluble polyurethane resin,dibutyl ester,and polyoxyethylene stearates were used as raw materials.A new pressing binder composed of stearic acid and alcohol-soluble polyurethane resin with a mass ratio of 1∶1 was developed based on the results from the ethanol dissolution test,sieving test,and drum test,which could well satisfy the requirements of the modern spray drying process.The cemented carbide mixtures doped with new pressing binder show better fluidity(33 s/25 cm^(3))and apparent density(3.27 g/cm^(3))compared with polyethylene glycol,paraffin wax,and butadiene rubber,and a lower pressing pressure(15.5 kN)is required during pressing.The sintered samples exhibit a more uniform microstructure and lower carbon residual(0.024%),showing that the prepared pressing binder is ideal for cemented carbide.

关 键 词：硬质合金 成型剂 性能 微观结构 

分 类 号：TG135.5[一般工业技术—材料科学与工程]