The Influence of Inclusions on Properties of the Cast Weld Structure Composed of Low Carbon High Manganese Steel Casting 低碳高锰铸钢件中夹杂物对铸焊结构性能的影响
During the analysis it is found that the amount of the liquation carbide in as cast condition structure is comparatively higher, the type of the carbide is mostly M_7C_3 with rich chromium and less M_2C with rich molybdenum. 经分析其铸态组织中液析碳化物数量较多。碳化物类型为以富铬的M7C3为主并附加少量富钼的M2C。
Effects of Rare Earth Elements on the Cast Structure and Some Properties of Nickle-free High Manganes Aluminium Bronze 稀土对无镍高锰铝青铜铸态组织和某些性能的影响
The Space morphology of as& cast structure in high speed steels 高速钢铸态组织的空间形态
An Inquiry into the Mechanism of Effect of Current Intensity on Refining of As cast Structure in Electroslag Remelting 电流作用细化电渣重熔铸态组织机理的探讨
Analysis is done to the causes of reject A30 block with sand inclusion, i.e.the elements of molding sand feature; cast structure, casting speed and arrangement for casting system, etc. 对A30气缸体夹砂废品产生的原因,即型砂性能、铸件结构、浇注速度、浇注系统的布置等方面的要素进行了分析。
The properties stability of the Zn-27wt% Al alloy has been studied. The cast structure and the ageing structure have been observed with SEM and TEM. The relationship curve between hardness and ageing time has been determined. 本文采用扫描电镜、透射电镜观察了Zn&27wt%Al合金的铸态组织及其120℃的时效组织,测定了120℃时效过程中硬度随时效时间变化的关系曲线,分析了性能变化与组织转变之间的关系。
It mainly means the length or width of the monolithically cast concrete structure is longer or wider than the maximum of the structure in the code. The influence of temperature change, shrinkage and creep on structure is the key to solve the problem. 主要特点是整浇楼面结构的长度与宽度超过规范限定值,分析温度变化及混凝土的收缩徐变对结构的影响是解决这个问题的关键。
The ball-lacking grate for hot blast stove was successfully produced out with correctly selecting casting process parameters according to cast structure and adopting moulding process with core-composing of water glass sand and resin sand. 根据铸件结构正确选择铸造工艺参数,采用水玻璃砂和树脂砂组芯造型工艺,成功地开发生产出合格的热风炉球缺式炉箅子。
Between two layers, it is the complex structural transitional zone. There exists Sn negative segregation in the cast structure by macro observation and the content of Sn decreases from outside to inside. 宏观上铸态组织存在Sn的反偏析,Sn的含量从外到内呈现下降趋势。
Through simulating the CSP process in laboratory, the high grade non-oriented silicon steel was produced. The cast structure and the pattern, size and type of the inclusion of casting slab were discussed. 在实验室首次模拟CSP流程生产出中高牌号的无取向硅钢,对铸坯的铸态组织及夹杂物形貌、大小及类型作了初步讨论。
As-cast structure of fe-Mo-c alloy Fe-Mo-C合金铸态组织的电镜观察
Consideration from the cast structure, the suitable mischmetal content in 6063 alloys is 0.20%. 从铸态组织考虑,6063合金中加入0.20%RE为宜。
The as cast structure, age hardening and thermomechanical age hardening characteristics and structural change of the alloys with Fe are similar to those of alloys without Fe, but the small amount of Fe added accelerates age hardening and thermomechanical age hardening process and increases hardening effect. 含少量Fe的合金的铸锭组织、时效硬化、形变时效和组织变化等基本特征与不含Fe的合金相类似,但少量Fe促进合金时效、形变时效过程,增加硬化效果。
The experimental results show that the W alloying changes the cast structure and does not change the structure after heat process of high Nb TiAl alloy. The W alloying does not change the influence of 4 typical structures and temperature on the mechanical properties. 试验结果表明,W合金化能改变高铌TiAl合金的铸态组织,但不能改变热加工组织以及4种典型组织和温度对其力学性能的影响。
Analysis of the cast structure and inclusion pattern of the high grade non-oriented silicon steel 中高牌号无取向硅钢的铸态组织及夹杂物形貌浅析
As a little ledeburite in the cast structure existed, it was heated to eliminate the cementite 1 hour at 770 ℃, following the graphitizing annealing 3 hours at 740 ℃. 若铸态组织中存在少量莱氏体,应770℃保温1h,以消除渗碳体,再进行740℃保温3h的石墨化退火处理。
The development status of dental cast titanium system and investment mold materials is introduced. The cast structure of surface reacted layer and some casting technological problems including mold temperature, cast pressure are also discussed. 对目前牙科铸钛系统,包埋材料,铸件表面反应层结构以及铸造工艺如铸模温度、铸造压力等的研究及发展现状进行了综合介绍。
This paper analyses effect of controlling thermal resistance interface of billet hardening, mould heat transfer conditions and cast billet structure on product quality in SCR continuous casting and rolling process for producing copper-silver alloy conducting wires. 分析了SCR连铸连轧工艺生产铜银合金导线时,铸坯凝固的热阻界、铸模的传热条件、铸坯组织的控制对产品质量的影响。
The result shows that the cast structure of the high chromium cast iron of percent 27% is ( Cr, Fe) 7C3, austenite and a little martensite and pearlite distributing around the carbon-poor alloying agent zone. 结果表明,Cr27高铬铸铁的铸态组织为(Cr,Fe)7C3、奥氏体和出现在碳化物周围贫碳合金元素区的少量马氏体和珠光体。
The effect of CE element on the cast structure of Al-Mg-Si alloy and its mechanism 稀土元素Ce对Al-Mg-Si变形铝合金铸态组织的影响及机理探讨
Combining with development of high speed blower impeller with large titanium material cast welding structure, The manufacturing technical feature of the impeller is set forth. 结合大型钛材铸焊结构高速鼓风机叶轮的研制,阐述了其叶轮的制造工艺特点。
Matching of technological parameters and its effect on surface quality and cast structure of copper single crystal rod during continuous casting 连铸铜单晶工艺参数的匹配及其对铸棒表面质量和组织的影响
The results show that increase of extrusion stress may improve the as cast structure and reduce distribution of dendritic structure. 结果表明:增加挤压压力,可以改善铸态组织,减轻枝晶分布;
The results indicate that the cast structure is refined distinctly with electromagnetic density increment, and the room temperature tensile strength and ductility are improved and reached the standards of hot rolling material. 结果表明:在磁场作用下,铸态组织得到明显细化,室温强度与拉伸塑性得以提高,达到了对热轧态材料要求的标准。
On the base of the proportional solidification principle, the problem of casting's shrinkage porosity was solved and fine casting with as cast pearlitic structure was obtained. 采取平做、平浇、平冷和复合运用微量合金元素及多次孕育等技术措施,利用均衡凝固理论解决曲轴内部缩松,获得合格曲轴铸件,并得到铸态珠光体组织。
The cast structure of the alloy consists of the primary Ag precipitate, ( Cu+ Ag) eutectic and Cu matrix. 铸态结构由初生Ag沉淀,(Cu+Ag)共晶和Cu相组成。
Results showed the welded structure is better than the cast iron structure in terms of stiffness, natural frequency, weight, technology and other aspects. Therefore, the welded structure plan is adopted. 从静刚度、固有频率、重量、工艺性等方面对各方案进行综合对比评价,确定本课题机床横梁采用焊接结构代替铸造结构。