防腐型7072合金空调箔工艺技术研究

以高通量连铸连轧7072合金空调箔为对象,通过对不同厚度铸板进行再结晶退火,研究了再结晶退火对铸板组织,后续压延加工道次分布和成品性能的影响.结果 表明,连铸连轧7072合金3.8mm空调箔坯料再结晶退火后,可减少冷轧2个加工道次,同时成品力学性能满足空调箔产品质量要求.     

PTP药箔基材生产工艺研究

采用拉伸试验、杯突试验、表面张力试验和针孔度检查,测定、分析了4种不同生产工艺方案样品的力学性能、破裂强度、表面张力以及针孔度,确定了合理的8011-H18状态PTP药箔基材生产工艺。结果表明：采用8011铝合金铸轧坯料可以生产高质量的PTP铝箔基材,在其冷轧至1．5mm时进行中间退火,退火制度为450～470℃／11～13h。通过对铸轧、冷轧和箔轧工艺的配合,可获得高表面质量和力学性能的PTP铝箔基材。     

PTP药箔基材生产工艺研究

采用拉伸试验、杯突试验、表面张力试验和针孔度检查,测定、分析了四种不同生产工艺方案样品的力学性能、破裂强度、表面张力以及针孔度,确定了合理的8011-H18状态PTP药箔基材生产工艺。结果表明:采用8011铝合金铸轧坯料可以生产高质量的PTP铝箔基材,在其冷轧至1.5mm时进行中间退火,退火制度为450～470℃/11～13h。通过对铸轧、冷轧和箔轧工艺的配合,可获得高表面质量和力学性能的PTP铝箔基材。     

成品退火对3102铝箔成型性能的影响

采用SEM、EDS及力学测试分析等手段研究了3102铝箔在不同退火温度下的析出相形貌、成分以及分布对铝箔成型性能的影响.结果表明,铝箔经过成品退火后,抗拉强度和延伸率在260℃出现转折说明是开始再结晶的温度,并出现了各向异性;析出相经冷轧和退火后析出的位置、形貌及尺度影响了铝箔的成型性,在280℃退火后发生了再结晶并重...     

电解铝液直接生产超薄箔坯料的熔体质量控制

针对电解铝液直接铸轧坯生产超薄铝箔坯料过程中所存在的质量缺陷,结合铸轧法生产铝箔坯料所采用电解铝液的特点,全面分析了生产过程中铝合金熔体处理工艺对熔体质量的影响因素,并研究制定了相应的铝熔体处理措施。有效改善了熔体质量,消除/减少了电解铝液生产超薄铝箔坯料的质量问题,实现了低成本、高效率、高品质、稳定生产超薄箔坯料的目标。     

高纯铝铸轧坯均匀化对其箔材组织结构的影响

研究了ＬＧ５电容铝箔铸轧坯料的均匀化处理对其箔材最终退火组织结构的影响。结果表明，采用均匀化处理可使箔材退火后晶粒尺寸减少、位错坑密度明显增加，对其立方织构也有明显影响－均匀化后采用慢速炉冷有利于提高铝箔的立方织构分数；均匀化的作用与箔材中微量杂质元素的分布和存在状态紧密相关。     

电解铝铸轧高级包装铝箔坯料中间退火与性能研究

以电解铝液铸轧制备高级包装铝箔坯料为研究对象,研究了其在不同中间退火技术参数下的组织性能。通过对电解铝液铸轧制备高级包装铝箔坯料组织性能进行分析对比,得出了制备高级包装铝箔坯料的最佳中间退火技术参数。结果表明：当中间退火温度为380℃,保温时间为4 h,电解铝液铸轧制备高级包装铝箔坯料组织性能最佳,且晶粒尺寸稳定分布在（20～25）μm,有利于后续轧制及内部针孔缺陷的控制,满足客户使用要求。     

退火工艺对阳极铝箔组织和性能的影响

利用金相显微分析、蚀坑腐蚀等方法研究了不同退火工艺对用偏析法提纯和三层液法提纯两种不同精铝原料配比生产的高压阳极铝箔再结晶组织及表面晶粒大小、取向、形貌及分布的影响.结果表明:再结晶组织主要由立方织构组成,偏析法提纯生产的阳极箔在300℃保温1 h完成再结晶,立方织构占有率趋于最大值,三层液法提纯的阳极箔在350℃保温...     

铸轧工艺参数对3102空调箔组织性能的影响

采用金相显微镜和力学拉伸机对工艺改进前后的3102空调箔组织进行分析,研究了不同工艺条件下铸轧带坯和空调箔成品的组织和性能。结果表明：采用大铸轧区铸轧工艺后,3102空调箔铸轧坯料晶粒得到了显著细化,延伸率提高,使用组织细化铸轧坯料生产的空调箔产品延伸率有着显著的优势,并可以在此基础上实现减薄。     

化学成分及退火工艺对散热器用铝箔力学性能的影响

本文结合各种状态空调箔的开发研究,着重介绍了空调器铝箔化学成分、中间退火、成品退火控制的特点,并作出工艺参数和性能之间关系的退火曲线四条,对生产各种状态空调箔有一定指导意义.     

Transverse creep and stress-rupture of borsic-aluminum composites and borsic-aluminum composites containing stainless steel and titanium

The transverse creep and stress rupture behavior of a number of Borsic®-aluminum composites was investigated at temperatures from 200° to 400°C. The cpmposites studied consisted of nominally 50 vol pct Borsic fiber and included matrices of 6061, 2024, 2219, and 5052 aluminum alloys. The effect of heat treatment was studied in the heat-treatable alloys. Where transverse composite behavior differed from matrix alloy behavior, the difference was found to be due primarily to a change in fracture mode at higher matrix strength levels from matrix failure to one which involves longitudinal fiber splitting. Of the four basic matrix alloys tested, the best creep resistance was obtained with the 2024 matrix. Additional improvement of transverse creep and stress rupture resistance was realized by incorporating transverse reinforcements such as SAP alloy foil, titanium alloy foil, and 0.002 in. stainless steel wire in the composites. These reinforcements made possible good transverse properties at 400°C with density increases of ≤15 pct. The two best additions were 21 pctβ III titanium foil and 6 pct AFC-77 stainless steel wire. A transverse fracture mode incorporating longitudinal fiber splitting was documented and characterized, and its effect on composite behavior determined. The use of nonsplitting fibers such as 5.6 mil B and 5.7 mil Borsic in preventing this fracture mode was investigated.     

成品退火对超薄双零铝箔质量的影响

超薄双零铝箔由于附加值高、经济效益突出而受到各铝箔加工企业的广泛关注,但是成品超薄铝箔的质量还有待进一步提高,本试验主要针对超薄双零铝箔经成品退火后的力学性能进行了研究,并对成品的质量进行了检测,确定合理的成品退火工艺。     

1235合金双零铝箔坯料力学性能研究

通过对比不同中间退火厚度对1235合金双零铝箔坯料成品力学性能的影响,找出了合适的中间退火厚度;并确定了最佳中间退火制度;通过合理控制铁硅比及适当降低铁含量,可显著降低1235合金双零铝箔坯料成品的抗拉强度,生产出满足用户要求的双零铝箔坯料。     

退火时间对Ti?6.0Al?3.0Zr?0.5Sn?1.0Mo?1.5Nb?1.0V钛合金组织及力学性能的影响

针对近α型Ti?6.0Al?3.0Zr?0.5Sn?1.0Mo?1.5Nb?1.0V新型钛合金,在退火温度740 ℃的基础上,研究了退火时间对其组织与力学性能的影响。结果表明:经过3次真空自耗电弧炉熔炼,三火热轧后得到的板材组织由初生α相基体及β转变组织组成的部分再结晶组织和加工态组织等组成。随着退火时间的增加,退火板材的显微组织均以初生α相为主,且α相所占的比例从81.73%逐渐增加至85.61%,组织中长条状α相逐渐破碎球化,等轴α相开始均匀化、粗化。随着退火时间的增加,退火板材的延伸率逐渐增加,抗拉强度先降低再增加然后又降低,屈服强度先增加后降低,显微硬度先增加后降低。退火时间为1 h时,板材的断口由滑移带、涟波、小等轴韧窝组成,断裂方式为韧性断裂,退火时间大于等于2 h时,板材的断口完全由等轴韧窝组成,断裂方式为韧性断裂。最佳退火工艺为740 ℃退火2 h,此时板材的抗拉强度、屈服强度、延伸率和显微硬度分别为:984 MPa、941 MPa、15.27%、HV 347.67。研究结果对高强耐蚀钛合金退火工艺的制定有指导作用,为解决钛合金在实际生产中遇到的问题提供了科学依据。      

铝液过滤工艺对超薄双零铝箔质量的影响

超薄双零铝箔由于附加值高、经济效益突出而受到现代铝箔加工企业的重点关注,但铸轧坯料质量的稳定性直接影响成品超薄铝箔质量.本试验通过研究铝液的过滤工艺对铸轧坯料质量的影响,进而导致超薄双零铝箔针孔数和成品率的变化,探索陶瓷过滤板对铝液过滤的最佳净化时段,确定合理的过滤工艺.     

浅谈铝型材室温断后伸长率的检测

从试样加工形状尺寸,取样方向,拉伸速率,以及人工测量与机器测量等方面,对公司生产的铝挤压型材断后伸长率进行测试分析。得出结论,圆形试样的断后伸长率比矩形试样的断后伸长率略大;平行长度越大,断后伸长率越大;横向取样的断后伸长率明显小于纵向取样的断后伸长率;人工测量比机器测量更可靠,更接近真实的断后伸长率。     

An electron microscopy examination of primary recrystallization in TD-nickel

Primary recrystallization in TD-nickel 1 in. bar has previously been regarded as the process by which the initial fine grain structure (1μ average grain radius) is converted to a coarse grain size (increases in grain size by 500 times) under suitable deformation and annealing conditions. This process is dependent on deformation mode. While it occurs readily after rolling transverse to the bar axis and annealing (800°C), it is completely inhibited by longitudinal rolling and swaging deformations, even for very high (1320°C) annealing temperatures. A transmission electron microscopy examination of deformation and annealing substructures indicates that primary recrystallization in TD-nickel 1 in. bar actually occurs on the sub-light optical level, to produce a grain structure similar in size to the initial fine grained state. Coarse grain formation is the result of abnormal grain growth (or secondary recrystallization), which follows primary recrystallization.     

Effects of boron doping on the grain-growth kinetics and mechanical properties of γ/γ′ nickel-aluminum alloys

The effects of 0.5 at. pct of boron doping on the microstructures and mechanical properties of γ/γ′ nickel-aluminum alloys have been investigated in the present study. A nickel-rich grain-boundary zone was observed in the boron-doped alloy after homogenization at 1100 °C and prolonged annealing at 1200 °C. Boron doping also caused remarkable improvements in toughness and tensile elongation and caused the fracture mode to change from completely intergranular to completely transgranular. The grain growth following recrystallization at 1200 °C was found to be retarded upon boron doping. A sudden increase in tensile elongation and a sudden drop in hardness were also observed upon prolonged heating during isothermal annealing at 1200 °C. The results are interpreted with reference to boron-nickel cosegregation at the grain boundaries.     

开发铝热轧大扁锭热轧坯料加工技术分析

概述了国内外铝板带箔加工工艺技术的现状,重点评述了国内铝板带箔加工业的产业结构,对铸轧坯料与热轧坯料的特性进行比较,同时对云南铝业发展铝热轧大扁锭、热轧坯料加工技术进行了探讨。