文档介绍：摘要
榨螺是螺旋榨油机的主要工作部件,榨螺在工作时除受到强大的挤压力、
摩擦力外,还承受着极大的扭转应力,因此榨螺磨损十分严重。磨损后的榨螺
需要及时更换,这不仅造成钢材、设备维修费用的巨大消耗,也给油厂用户带
来停产损失和极大的不便。因此,提高榨螺的使用寿命,已成为国内油厂的迫
切需要和螺旋榨油机生产厂家急待解决的技术难题。
本文通过对螺旋榨油机磨损报废榨螺进行了宏观观察与微观失效分析(SEM
照片),得出螺旋榨油机榨螺磨损失效主要包括磨料磨损、疲劳磨损和冲蚀磨损
三种形式。在此分析研究的基础上,本文参考国内外对榨螺抗磨处理的研究成
果,应用现代表面工程技术,利用火焰喷熔和爆炸喷涂工艺、利用耐磨金属陶
瓷粉末(WC/12%Co)和碳化钨弥散型自熔剂合金粉末(Ni60A+WC35%)材料,制
作了 5 种耐磨涂层的榨螺试样。利用光学显微镜、X-射线衍射仪、显微硬度计
对耐磨涂层的微观组织结构、相组成、显微硬度进行分析。试验结果表明:爆
炸喷涂 WC-12%Co 涂层具有应用前景。在此基础上,进一步制作试样进行试验和
分析,利用 Image-Pro Plus 分析软件、拉伸试验机对爆炸喷涂 WC-12%Co 涂层
进行孔隙率、结合强度测定,利用销盘式磨料磨损实验机,与传统榨螺的试样
进行磨料磨损对比试验,并采用 Origin 软件对磨损失重-磨损时间进行回归分
析。试验结果表明:爆炸喷涂 WC-12%Co 涂层孔隙率较低(%)、结合力较高
()、表面耐磨性远远强于传统榨螺渗碳淬火层。在同种条件下,涂层
使用寿命是传统榨螺渗碳淬火层的倍。本文的研究对获得具有较好耐磨性
能的涂层,有效延长螺旋榨油机榨螺的使用寿命具有一定的参考意义。

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关键词:螺旋榨油机,榨螺,延寿,热喷涂,耐磨涂层

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ABSTRACT
The screw is the ponent of the screw-press. At work the screw is not
only received formidable extrusion stress and friction, but also is withstood the
enormous moment, which make for the wear abrasion of the screw is extremely
severity. The wear abrasion screw needs promptly to replace, which results in the
huge consumption on the steel products and the equipment maintenance cost, at one
time which brings the production suspension loss and enormous inconvenient to the
oil factory user. Therefore, how to enhance the screw’s service life has e to
the urgent needs of the domestic oil factory and the technical difficult problem
which the screw-press factory urgently needs to solve.
The screw that was discarded because of wear abrasion was studied in this
article by the macroscopic observation and the microscopic analysis (the SEM
picture), through which the wear types of the screw mainly included three kind of
forms which were the grinding wear, the weary wear and the erosion wear. Based
on this analysis research, this article referred the wear resistance technic in the
domesti