电池锌饼裂纹产生原因浅析

本文分析了电池锌饼裂纹产生原因，并针对轮带式连铸连轧工艺，提出了改进方法。     

轮带式连铸连轧生产电池锌饼的工艺及质量

本文通过对生产电池锌饼不同工艺方法的比较，认为轮带式连铸连轧线是最佳的方案，并以该工艺方案为重点，阐述影响电池锌饼质量及性能的因素，提出生产高质量产品所需要的合理工艺参数及操作方法。     

轮带式连铸连轧线生产电池锌饼的工艺及质量

本文通过对生产电池锌饼不同工艺方法的比较,认为轮带式连铸连轧线是目前生产电池锌饼最佳的工艺方案,并以该工艺方案为重点,阐述影响电池锌饼质量及性能的因素,提出生产理想产品质量所需要的合理的工艺参数及操作方法。     

饼类锻件锻造的关键技术

生产实践证明，饼类锻件的生产难度要比轴类锻件大，因为饼类锻件在不同的变形工艺和参数条件下，有着差别极大的变形机制。大型饼类锻件常规生产的工艺存在着萌生裂纹源的变形机制，理论分析和实验证明，锥形板镦粗、局部压平的工艺是生产饼类锻件的最佳工艺，具有广阔的应用前景。     

饼类锻件质量控制及相关锻造工艺探讨

夹杂性裂纹是饼类锻件生产的主要质量问题,为此对饼类锻件内部夹杂性裂纹的形成机理进行了模拟研究,发现锻件内部裂纹在高温下自修复的现象及规律,在此基础上提出了可有效控制夹杂性裂纹的大型锻件及针对饼类锻件的锻造工艺,实用这些工艺不仅提高了锻件的成品率,且改善了产品的内在质量,其经济和社会效益十分显著。     

锌基镀层热冲压钢研究进展

介绍了近年来锌基镀层热冲压钢的研究进展,详细叙述了锌基镀层热成形钢镀层在奥氏体化过程中的组织变化和加热工艺对镀层组织、表面高温氧化的影响规律,并对锌基镀层热冲压过程中的裂纹形成机理进行了分析。现有研究表明,合理控制热冲压工艺窗口时可以消除液态金属脆性(LME)导致的宏观裂纹,同时可以控制镀层表面氧化,对耐蚀性和涂装性能有利。疲劳测试则表明,10μm的微观裂纹不会对材料基体的疲劳极限产生显著影响。     

优化合金成分与生产工艺,控制电池锌饼的合适硬度

结合四轮轮带式连铸连轧生产线生产电池锌饼卷坯的特点。阐述合金成分与生产工艺对电池锌饼硬度的影响，指出生产合适电池锌饼硬度最优化的合金化学成分与生产工艺条件。     

万吨电池锌饼生产线投产

锌材是生产干电池的重要原料,用它制作干电池锌筒外壳,一方面可盛装作为正极活性物质的二氧化锰,另一方面本身又作为干电池的负极活性物质。锌筒制作方法有两种,一种是锌片焊接成筒;二是锌饼冲压而成。1973年以前,全国各地电池厂基本都是采用焊接锌筒的生产工艺,即将锌饼箔片剪裁之后,人工锡焊。该工艺生产率低,制作工艺复杂,目前焊锡价格上涨,资源紧俏,国外早已被淘汰。国内由于就业、资金等方面的原因,该工艺至今仍占有相当的比例。整     

锌饼卷坯厚度精度的控制

从设备、工艺、操作等方面叙述影响锌饼卷坯厚度精度的因素。     

高纯锌大锭的开发和与研究

介绍了锌的组织结构与形成裂纹的联系，也提及到锌的物理性质；着重阐述生产中处理锌大锭开裂的工艺措施，如浇注温度的控制，加冷锭的开发制冷却等，对影响锌大锭的表面质量如分层，冷隔等缺陷的消除也进行了总结。     

Considerations for Design Criteria for Lunar Structures

The development of design criteria for lunar structures must begin soon in order to establish adequate criteria. Some of the items that need consideration in such criteria are discussed. The categorization of the structures will provide designers with information on the purpose and level of complexity of the structure. Various construction materials and structure types that will be critical for the design of lunar structures, are considered. The environment of the moon and its possible effects on structures are presented and lead to the development of a few load cases that need to be considered in design. A probabilistic format for the criteria and design lifetimes are also discussed.     

Guidelines for Warranty Contracting for Highway Construction

This paper presents guidelines for implementing the construction warranty contracting method in the highway construction industry. A logical, step-by-step method for effectively applying the warranty contracting program for use in the highway construction industry is developed. Relevant issues that may present obstacles to the implementation are addressed, while the best practices, compiled from an evaluation of the current industry’s state-of-the-art practices, will assist an interested state highway agency in creating a warranty specification. In performing this research, the current use of warranty specifications among state highway agencies was examined, and an in-depth case study of the Wisconsin Department of Transportation’s warranty program was conducted.     

Evidence for clinical smoking cessation for adolescents.

Objective: This report reviews the evidence that informs the role of health and mental health care providers in addressing youth smoking cessation. Design: Qualitative literature review. Results: Physicians do not consistently screen adolescents for tobacco use and fail to provide recommended cessation advice. Challenges to addressing smoking cessation include the need for procedures to ensure confidentiality and the existence of competing demands to provide other services. Few published studies have specifically addressed the effectiveness of clinical interventions. Interventions that require return visits or follow-up phone contacts are technically difficult to implement in this population. Successful interventions may require resources not available in nonresearch settings. Most studies have used brief clinical intervention as a control condition, making it impossible to evaluate its effectiveness. Conclusion: There is little evidence that supports current clinical smoking cessation guidelines for adolescents. More research is needed to develop inexpensive, efficient clinical interventions that can provide youths access to smoking cessation help. Future challenges include reorganizing clinical systems to offer greater counseling by support staff or in electronic formats and to provide effective booster messages and follow-up care in a population that is difficult to track. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

铝油堵模锻成形的质量控制

以具有薄壁、小尺寸和高精度的铝油堵锻件模锻成形为研究对象，介绍了对其折迭、裂纹、错移量不得大于0．5mm的壁厚尺寸为3．2 0.4^0.6mm进行有效质量控制，以及其镶块锻模设计的有关内容。     

金属矿地震勘探钻孔方法研究

金属矿地震勘探一般位于复杂的山地和丘陵地区,而在这些地区开展地震数据采集工作有很大的难度。而这些问题产生的最根本的问题是激发成孔问题,只有成孔到合适的激发层位,才能获得较好的激发效果。本文主要依托某金属矿地震勘探研究项目,提出了一套经济、高效、便捷的钻孔方法。