摘要
本文通过模拟锭杆与锭底的试件和工况对几种自制的粉末冶金锭底新材料进行了正交法滑动摩擦磨损试验。结果发现,Fe-C-Cu粉末冶金锭底材料的含Cu量和含油率分别为3.00％和10.78％时的磨损率最低(1.455×10^(-2)μm/h)。为了进一步提高锭杆-锭底配副的耐磨寿命,又在保证最佳含油率的前提下,通过添加多种合金成分开发了一些新型的粉末冶金锭底材料。其中,磨损率最低的仅为0.758×10^(-2)μm/h,这几乎只是上述Fe-C-Cu粉末冶金锭底材料最低磨损率的1/2。作者还就含Cu量和含油率等对粉末冶金锭底材料耐磨性的影响机理进行了分析与讨论。
Under simulating ingot bladestep bearing pieces and working conditions,the friction-wear properties of several new powder metallurgical step bearing materials were tested with the orthogonal method. The results are as follows:
a. The influence of copper content on the antiwear property of powder metallurgical step bearing material is the most. The basic structure feature can be altered and the strength and hardness of material can be increased by adding copper element. Under the given conditions,the hardness of material with 3% of Cu content is the highest and its antiwear property is the best.
b. The oil rate is the other important factor influencing the anti-wear property of powder metallurgical step bearing material. Under the prerequisite of ensuring strength and hardness of the material, when the copper content is 3% and oil rate is 10.78% the wear-resistance is the best (the wear rate is 1.455×10-2μm/h).
c. The influences of three heat treatment and surface treatment technologies on the mechanical property and antiwear of Fe-C-Cu powder metallurgical step bearing material make no much difference. The C-N co-impregnating material has higher hardness and good antiwear property. The friction force of test piece which was treated by quenching and sulphurizing is the lowest.
d. The wear test is performed by using three level-four factor orthogonal method, it is a practical way, in which the effective results and informations can be obtained with a few test. It is important to prepare the new powder metallurgical step bearing material.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
1992年第1期55-63,共9页
Tribology
关键词
粉末冶金
锭底材料
正交试验
磨损
powder metallurgical step bearing material, orthogonal test, copper content, oil rate, antiwear property
