卫星天线用8011铝合金带材生产工艺研究

研究了铸轧带材生产卫星天线用8011铝合金带材（简称卫星天线带材）的工艺过程,确定了合金化学成分及成品退火制度,产品性能满足顾客使用要求。     

Hazelett连铸连轧3004合金组织性能研究

对Hazelett连铸连轧坯料生产3004合金深冲带材的生产工艺进行了研究,通过研究中间退火工艺对3004铝合金带材组织与性能的影响,确定了合理的中间退火工艺制度。生产出的0.25mm厚度带材抗拉强度为172MPa,伸长率为20%,均超过标准规定值及用户的要求值,深冲性能良好,满足市场对3004合金深冲带材的要求。     

8A02铝合金带材生产工艺研究

介绍8A02铝合金带材的熔铸、轧制工艺的系统研究,对合金的再结晶温度、各温度退火力学性能和组织的变化也进行了分析,并确定关键工艺的生产技术要求及最佳成品退火温度。     

冰柜衬板用1145铝合金带材工艺研究

研发了用铸轧坯料生产高表面、高性能冰柜衬板用1145铝合金带材的工艺过程．确定了合金化学成分和高温均匀化退火及成品退火制度．产品性能满足对其进行表面阳极氧化和折弯的使用要求。     

热处理对汽车散热器用铝合金钎焊带材组织和性能的影响

研究了均匀化和非均匀化处理状态下的不同中间退火工艺对钎焊带材组织和性能的影响。结果表明：在钎焊带芯材3003铝合金铸锭没有均匀化处理时,采用低温再结晶退火,合金的晶粒较大且大小不一;高温快速加热退火,可获得相对细小、均匀的合金晶粒组织。热轧复合前对3003铝合金铸锭进行均匀化热处理,可获得均匀的合金组织和稳定的力学性能。     

5052铝合金带材表面色差影响因素的探究

文章通过试验对比和数据收集,探讨了不同工艺对铝合金带材表面色泽的影响。最终认为,合金种类、轧辊粗糙度、压下制度、润滑条件、退火工艺等参数,均会对表面色泽产生直接影响。     

高强度和良好可轧制性的铝合金箔的生产

一种铝合金箔，由一种成分（重量％）包含1．2-1．7铁和0．35-0．80硅，其余是铝和偶然杂质的合金制成。所述合金经连续铸带成形为厚度小于25mm的带材，然后经冷轧至中间退火的厚度并在至少400℃的温度进行中间退火。该中间退火的带材经冷轧并进一步退火而形成最终箔产品，具有卓越可轧制性与高最终箔强度的组合。     

3005合金扁铸锭熔铸工艺研究

针对3005铝合金扁铸锭进行熔铸工艺研究,通过成分、性能、高倍等分析,得出制定3005合金扁铸锭工艺的可行性。     

铜板带材粘结缺陷形成与控制分析

我国铜板带材生产企业众多,钟罩炉被广泛用于紫铜、青铜、黄铜和白铜带材退火。在用钟罩炉对铜板带材退火后,经常出现铜板带材粘结缺陷,尤其对厚度较薄铜板带材退火时,粘结严重,成为影响企业产品质量和成材率的重要因素。因此,理清影响铜板带材粘结缺陷因素,避免粘结产生,对提高企业经济效益显得十分必要。     

厚度对纳米晶软磁合金带材自由面结构的影响

采用斜喷工艺制备4种厚度的Fe73Ni1Cu1Nb3Si13B9非晶带材,并进行了真空晶化退火,用扫描电镜(SEM)和原子力显微镜(AFM)分析了晶化退火前后带材自由面结构变化情况,研究结果表明制备态带材的表面平整度、表观缺陷都能达到应用要求,随着带材厚度降低,带材自由面表观平整度随之提高,表观缺陷也随之减少.晶化退火...     

Determinants of Economic Cost Related to Low Back Pain among Nurses at a University Hospital

Little is known of the genetic factors that may contribute to the development of chronic idiopathic thrombocytopenic purpura (cITP). We have previously shown that a developmentally regulated Vh gene (Humhv3005) is absent in 10/41 (24%) of patients with systemic lupus erythematosus while it is absent in only 7/88 (8%) of normal controls. This finding suggests that a homozygous deletion of an Ig variable (V) gene may alter the immune system and thus predispose the host to an autoimmune disorder. We have analyzed the same gene in 44 patients with cITP and found that Humhv3005 and like genes were absent in a higher percentage of patients (14 of 44, 31.8%) than they were absent in either normals (7/88, 8%, p = 0.002) or thrombocytopenic patients without cITP (6/53, 11.3%, p = 0.042); the hv3005 deletion frequency in the latter group did not differ from that in normals (P = 0.74). These data suggest that deletions of Humhv3005 and/or highly homologous Vh genes may predispose individuals to the development of cITP, and may contribute toward production of pathogenic antiplatelet antibodies.     

Structure-activity relationship of a novel K+ channel opener, KRN4884, and related compounds in porcine coronary artery

1. KRN4884 (5-amino-N-[2-(2-chlorophenyl) ethyl]-N'-cyano-3-pyridinecarboxamidine), Ki3005 (5-deamino KRN4884), Ki5624 (2-dechloro KRN4884) and Ki1769 (5-deamino-2-dechloro KRN4884) produced concentration-dependent relaxations in isolated porcine coronary arteries contracted by 25 mM KC1. The order of relaxant potency was KRN4884 > Ki3005 > Ki5624 > Ki1769. 2. The relaxation induced by these compounds was antagonized by glibenclamide; they had almost no effect on coronary arteries contracted by 60 mM KC1. 3. The present results suggest that these pyridinecarboxamidine derivatives have vasodilating ability based on a K+ channel opening action, and that both the amino groups in the pyridine nucleus and the chlorine atom in the benzene nucleus in pyridinecarboxamidine are important for their potency as a K+ channel opener.     

Effect of Microstructure on Diffusional Solidification of 4343/3005/4343 Multi-Layer Aluminum Brazing Sheet

The effect of microstructure on clad/core interactions during the brazing of 4343/3005/4343 multi-layer aluminum brazing sheet was investigated employing differential scanning calorimetry (DSC) and electron back-scattering diffraction (EBSD). The thickness of the melted clad layer gradually decreased during the brazing operation. It could be completely removed isothermally as a result of diffusional solidification at the brazing temperature. During the brazing cycle, the rate of loss of the melt in the brazing sheet, with small equiaxed grains’ core layer, was higher than that with the core layer consisting of elongated large grains. The difference in microstructure affected the amount of liquid formed during brazing.     

罩式退火工艺对Nb+Ti-IF钢性能的影响

研究了罩式炉退火条件对Nb＋Ti—IF钢性能的影响,通过试验确定了最适合现场生产条件的退火工艺参数。试验结果表明,随着退火温度的升高,Nb＋Ti—IF钢的延伸率和凡值、r值呈上升趋势,而对其它性能的影响不大。最佳退火温度为740℃,最佳退火保温时间为8h。     

热镀锌退火过程中的温度控制策略

热镀锌退火过程对热镀锌板力学性能有着重要的影响.制定合理的退火温度制度,并精确控制板温,成为实现热镀锌板精准退火过程的核心问题.分析了退火工艺对热镀锌板性能的影响,针对现有退火工艺制定方法的不足提出了基于数据驱动的退火工艺制定方法,该方法能够实现热镀锌板退火工艺的持续优化.同时系统地综述了目前基于模型的热镀锌退火过程板温控制策略,针对热镀锌退火过程特点,提出了具有高适用性的数据与物理模型相混合的热镀锌退火过程温度控制方法,能够实现热镀锌板的精准热处理.     

1Cr12Ni3Mo2VN退火工艺研究

通过1Cr12Ni3Mo2VN（KT5312AS6）钢不同的退火工艺、退火温度及时间、二次退火及退火冷却方式对硬度的影响实验研究,得出本钢种最佳退火工艺。经实验证明,采用不完全退火及二次退火方式,能够满足标准对交货硬度的要求。     

退火工艺对高耐蚀Galvalume钢板镀层表面结构的影响

采用连续退火、镀锌和合金化模拟机制取了不同退火温度和退火时间条件下Galvalume钢板的退火试样,通过SEM、EDS、XRD等试验方法,进行了退火工艺对于Galvalume钢板镀层表面结构影响研究,阐明了表面相结构和w（Fe）的变化规律。结果表明,随着退火温度和退火时间的增加,Galvalume镀层表面α相和α＋β共...     

镍铝复合丝的退火工艺

分析了两种不同的退火工艺对镍铝复合丝性能的影响。在生产工艺改进的基础上,通过串联一台退火炉,实现了单丝的连续退火,确定了退火温度与退火时间的关系,提高了丝材性能的均匀性和丝材强度,解决了丝材退火后软硬不均匀、容易出现脆断等问题。     

Zr-Sn-Nb-Fe合金加工过程中再结晶退火处理研究

以Zr-1.0Sn-1.0Nb-Fe合金为研究对象,对其挤压管坯、一次冷轧管坯及二次冷轧管坯进行真空退火处理,并采用偏光显微镜对每道次退火后的金相组织进行观察分析,研究了不同挤压温度以及不同退火制度对Zr-Sn-Nb-Fe合金再结晶退火处理的影响。结果表明:同一加工态下,600℃的挤压管坯在640℃/2 h退火发生再结晶程度大于640℃的挤压管坯,再结晶温度随挤压温度的降低而降低;在600℃的退火温度下,延长保温时间对锆合金再结晶程度影响不大;对挤压管坯、一次冷轧管坯的最佳退火温度为600℃/2 h,二次冷轧管坯的最佳退火温度为580℃/2 h或590℃/2 h。