2) PM airplane brake material
粉末冶金航空刹车材料
1.
Present situation and development of powder metallurgy airplane brake materials and primary properties of some domestic PM airplane brake materials were introduced in this paper.
综述了粉末冶金航空刹车材料的应用现状与发展状况 ,介绍了几种国产粉末冶金航空刹车材料的基本性
3) metallurgical powder material
粉末冶金材料
1.
Metallurgical powder materials mainly include hard alloy, low friction metallurgical powder material, metallurgical powder structure material and friction metallurgical powder material etc.
粉末冶金材料主要包括硬质合金、粉末冶金减摩材料、粉末冶金结构材料和粉末冶金摩擦材料等。
4) Powder Metallurgy-Materials
粉末冶金-材料
5) powder metallurgy material
粉末冶金材料
1.
Applications of manganese in powder metallurgy materials;
锰在粉末冶金材料中的应用
2.
The yield criterion for powder metallurgy materials is a basis of generalized plasticity theory for these materials,and its mathematical expression has important effect on the estallishment of generalized plasticity theory.
粉末冶金材料屈服条件是粉末冶金材料广义塑性理论的基础 ,其数学表达式对粉末冶金材料广义塑性理论方法的建立有重要影响。
3.
Aimed at the problems of abrasion and oil-leakage of the diesel engine valve guide bush,a new powder metallurgy material of high strength and abrasion resistance performance was developed Three different sealing structures were designed,and theoretical analysis of the characteristic of hydrodynamic lubrication for these structures was carried out.
针对柴油机气门导管的漏油与磨损问题 ,设计了高性能粉末冶金材料和三种不同的密封结构 ,并从理论上对这些结构的流体动力润滑特性进行了分析计算 ;然后通过对材料改进前后的摩擦磨损试验、不同结构的漏油量对比试验和整机排放试验 ,证实材料设计和理论计算是合理的 ,同时也证实气门导管只加工凹槽而不安装密封圈的结构既可以润滑又可以密封 ,此结构不仅节省密封圈、简化装配工艺 ,而且减少进入进、排气道的机油量 ,降低颗粒排放 ,还减轻了气门副的磨损 ,从而在实际机型中得到应
6) Powder metallurgical material
粉末冶金材料
1.
The yield criterion for powder metallurgical materials was a key basis of genera lized plasticity theory.
粉末冶金材料屈服条件是广义塑性理论的重要基础。
2.
Plastic forming is an important process for powder metallurgical materials, but the classic plasticity theory based on the volume constancy for fully dense materials can′t be applied to the powder metallurgical materials.
塑性加工是粉末冶金材料的重要加工工艺 ,致密熔铸材料经典塑性理论 ,不适于塑性体积变化的粉末冶金材料。
3.
Based on the yield criterion and plastic potential theories, a plastic constitutional relation, yield condition and yield curve equation in plane strain for powder metallurgical material were derived.
粉末冶金材料是塑性可压缩材料 ,其塑性理论方法有待于深入研究。
补充资料：机械工程材料:粉末冶金减摩材料
用粉末冶金方法製造的﹑在相对运动中相互摩擦表面之间的摩擦係数较小的金属﹑合金或金属复合材料﹐又称烧结减摩材料。烧结减摩材料广泛用於製造滑动轴承﹑止推轴承﹑端面密封﹑支承衬套等。其主要优点是在有限润滑油的条件下﹐使用寿命较长和可靠性较高。烧结减摩材料按其製造方法可分为两类。一类是在材料孔隙中浸有润滑油或在材料成分中加有(或在其表层充覆)减摩剂或固体润滑剂(石墨﹑氧化物﹑硫化物﹑氮化物﹑氟塑料或其他塑料)。这类材料在乾摩擦条件下依靠自身或表层含有的润滑剂润滑﹐即具有自润滑效果。另一类是钢与烧结合金的复合材料﹐如在钢带上烧结一层铜铅合金粉末等。这类材料的承载能力比前一类大﹐一般用以製造重载轴承。烧结减摩材料的发展趋向是提高多孔铁基和铜基材料的承载能力﹐发展能在较高温度和更恶劣的摩擦条件下使用的材料﹐研製能在真空和惰性气体中工作的材料。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条