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Based on the data analysis of casting lamella, scan electron microscope and reservoir pressure, the mechanism of secondary pore of the beach-bar sandstones are researched in the upper Es4 of the Palaeogene in Boxing Sag .

根据砂岩铸体薄片、扫描电镜、地层压力分析，研究了博兴洼陷沙四上亚段滩坝砂岩次生孔隙的形成机制。

Patternless Casting Manufacturingtechnology is one kind of Rapid Prototyping technology with independent intellectual property rights of our country and it has been widely applied in many fields.

清华大学机械工程系激光快速成形中心，北京 100084摘要：无模铸型制造技术是一种具有我国自主知识产权的应用广泛的快速成形技术。

In practical application of rapid manufacturing of complicated casting, the advantages of easy obtaining molding material, short period manufacturing, low cost, the good quality casting are showed in patternless casting manufacturing and especial the promptitude virtue are full showed.

在复杂铸件快速制造的实际应用中，无模铸型制造技术表现出造型材料易得、制造时间短、制造成本低、铸件质量好等优点，体现了快速敏捷制造的优势，也为快速成形技术在铸造中的应用开辟了一个新领域。

Our ShengLei wear-resisting Alloy Ltd,Co has a long history of casting and imitating famous brand quick-wear parts,and co-duelop with Shanghai on the melt in the cement,pitch sting machie ,leaf,pitch spiral blade of pawer,press plateform,excavator figh tooth and so on .

盛磊耐磨合金有限公司有着铸造加工和铸仿著名品牌易损件的历史，并与上海有关院校金相研究中心，共同开发水泥与沥青搅机中的衬板、拌叶，及沥青摊铺机的螺旋叶片，熨平板、挖掘机斗齿，支撑架等新品种。

In this thesis we used two types of low-carbon ductile as the basal of low-carbon ductile cast—infiltration, one is as-cast high-toughness pearlitic low-carbon ductile, the other is as-...

用我们自己配制的合金粉末进行低碳球铁表面铸渗合金化后，得到的表面渗层的硬度最高可以达到HRC58，远远高于母体的硬度。

In this paper, the internal transverse cracks of continuous casting slabs of a niobium bearing peritectic grade of steel are investigated using electron probe microanalyser and optical microscope.

连铸坯厚度中心存在的内裂纹在后续的轧制过程中轧不合而对产品的质量带来重大的影响。

Based on the summarization of current situation of fluorine-free mould fluxes at home and abroad,the main problem during decreasing fluorine for high carbon steel and peritectic steel mould fluxes was analyzed,which includes the stability between viscosity and temperature at high temperature as well as effective control of crystallization properties .

综述了国内外无氟连铸结晶器保护渣发展状况，分析了目前高碳钢和包晶钢用保护渣降氟过程中面临的主要问题：高温时粘度-温度特性的稳定性以及保护渣结晶性能的有效控制。

Influence of cooling rate, silicon and manganese content on the peritectic reaction and peritectic point of Fe-C alloys has been studied by the experimental data and production data for solving the problem of longitudinal surface cracks.

包晶反应对铸坯表面质量影响严重，笔者针对邯钢CSP生产线的表面纵裂问题，利用实验和生产数据研究了冷却速率和硅、锰合金元素对Fe-C合金的包晶反应和包晶点位置的影响。

The correctness and validity of the theory, new method and the software in this paper are also proved by the analysis of measurement of a number of core samples from different oilfields, for example, mercury injection tests for 531 samples, petrographic image analyses for 30 samples and relative permeability measurements for 20 samples.

整个研究过程以样品实验分析为基础，通过大量的钻井岩心样品的压汞测试（531个）、岩石图像分析（40个）、扫描电镜（40个）、铸体薄片观察（40个）和相对渗透率实验（20个）结果实例分析，得到了本文的结论，验证了新方法及软件的正确性和有效性。

The fracture reasons of high strength PC steel wire are analyzed, it's considered that center segregation, central cavitation, poriness and inclusion are the metallurgical reasons which lead to the facture of PC steel wire and in the rolling process, differential coping quality, microcrack caused by surface defect, abnormal microstructure caused by burnt and improper cooling velocity, the ears on the head of the wire, overlapping of the wire rod itself are the main reasons which lead to the facture of PC steel wire. At the same time, inappropriate pickling, differential phosphorization quality, the bad heat treatment quality, the generation of crack in the improper drawing and transverse crack caused by abnormal laying of the drawing die are also the reasons of the cracking of PC wire.

对高强度PC钢丝断裂原因进行了分析，认为连铸坯的中心偏析、中心缩孔、疏松和夹杂是导致PC钢丝断裂的冶金原因；轧制过程中，较差的修磨质量、表面缺陷导致的微裂纹，过烧以及不适当的冷却速度导致的非正常显微组织，盘条头部的耳子、盘条本身折叠是导致PC钢丝断裂的主要原因；同时，不恰当的酸洗、较差的磷化及热处理质量、不适当拉丝裂纹的产生、拉拔模具安放不正导致的横裂也是PC钢丝断裂的原因。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。