In actual engineering applications , its wear resistance reduces due to the high temperature resulted from the continuous and heavy load service , which cannot fit the demand of engineering applications . based on the recent research throughout the world , in order to improve mechanical properties and wear resistance at high temperature of za27 alloy , si and mn are added to modify its microstructure . its microstructure and mechanical properties are tested and the sliding friction at ambient temperature and sliding friction at high temperature of znalsi and znaimn are studied 本文研究了za系合金中应用最广泛的za27合金，针对企业在工业应用过程中发现za27在中低速重载连续工作时，因温升造成耐磨性下降，难以满足工况要求的实际情况，为进一步提高其力学性能和高温耐磨性，结合国内外研究现状，在za27合金基础上，添加si 、 mn合金元素调整合金的组织，通过显微组织分析和常温机械性能测试，以探索znalsi及znalmn合金常温及高温滑动摩擦条件下的摩擦特性。
Grey cast iron is a type of alloys containing more than one elements , and their properties are determineed by it ' s compositions , melting and pouring conditions in the preparing of melt . at the same time , it requres charging in the lowest cost . this is a common problem which must be coped with in the applications of grey cast iron , and the solving of it is of great practical values 灰铸铁是由多种合金元素组成的复杂体系，其性能不但受成分和熔炼工艺参数的影响，同时还要考虑成本因素，其成分?工艺?性能建模和低成本配料，在灰铁工程应用中是一个普遍关注的问题，其研究具有较大的实际应用价值。
It is researched that the influence on the tube lifetime of the metallographic structure and the alloy element and the rigidity by the test the superheater and reheater tube which is made of 12cr2mowvtib steel . the metallographic change after the tube has run in the high temperature and high pressure condition for long time is more believable and frank than the intensity lifetime analysis to evaluate the tubes remain lift time 然后，通过试验研究了过热器和再热器管12cr2mowvtib钢材的金相组织、合金元素和硬度等对管道寿命的影响，分析管材在高温高压下长期运行后金相组织的变化情况，对管材定性寿命评估，这种与强度寿命分析完全不同的方法直观可信的展示了材料损伤状况。
6013 aluminum alloys containing different main alloying elements minor alloying elements were designed and prepared by ingot - metallurgy processing . the tesile mechanical and aging properties of the studied alloys were tested ; the microstructure of those alloys were observed and analyzed using optical microscope ; the influence of main alloying element mg , si , minor alloying elements mn , cu and homogenization process on the structure and property of studied alloys were studied 采用铸锭冶金方法，设计并制备了不同合金元素含量的6013铝合金，将铸锭热加工以后，测试了合金的拉伸力学性能和时效性能，采用金相显微镜观察分析了合金的显微组织结构，研究了合金中主合金元素mg 、 si ，微量元素mn 、 cu添加量、均匀化温度和时间对合金组织和性能的影响。
In this paper , the vsi is produced by powder metallurgy . various alloy elements added , porosity and microstructure of materials is considered to affact the vsi ' s property ; matching between the working and none - working layer of vsi is discussed ; and the cost reduction of two - layer vsi is analysed as well 研究了各种合金元素的添加、孔隙率和显微组织对阀座圈工作性能的影响；讨论了双层阀座圈工作层与非工作层之间的匹配；分析了双层阀座圈在成本上的优势。
There would be found distinct second " hardening apex in the curve when a conclusion was drawn that i : is likely that the most effective measurement to increase the strength and toughness is to fine grains and precipitate carbide nucleates of microalloyed elements , especially , fined grains of microalloyed elements increase the strength and toughness greatly 结论；综上所述，在一定的热处理工艺下，提高微合金化50crv钢强韧性的最有效的方法是细化晶粒和沉淀强化，特别是微合金元素的细化晶粒强化作用。
In regard to the low wear resistance of the white iron shot in the practical application , based on experimental research and trial production , by alloying and proper heat treatment , the shot can be made with higher hardness , better toughness and increased service life 摘要针对白口铁丸在实际应用过程中不耐磨的现象，通过大量实验研究和试生产，找到通过添加合金元素生产合金铁丸，并通过适当热处理等手段，使其既具有较高硬度，又有良好的韧性，使用寿命得到提高，满足抛丸工作的需要，节约大量资金，提高了劳动生产率。
