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介绍了冷轧薄板的典型冲压成形方式,结合冷轧不锈钢带基本成形性能与冲压性能的关系,探讨了组织、成分、冷轧工艺、表面质量等因素对冷轧奥氏体不锈钢带冲压性能的影响.提出冲压用冷轧奥氏体不锈钢带要适当增加Ni、Cu含量,减少δ铁素体,控制晶粒度,并对冷轧压下率、厚度精度、表面粗糙度、表面缺陷进行控制,以满足冲压要求. 相似文献
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1 冷轧薄板的新产品为了满足国民经济及人们日常生活的需要,当代冷轧薄板生产出现了许多新产品,主要有: ①适用于自动化生产线的高精度冷轧板及冷轧带钢卷; ②具有改善冲压性能及良好光泽度的激光毛化冷轧钢板; 相似文献
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采用光学金相显微镜、电子万能力学试验机、抗下垂试验等测试手段,研究了中间退火、冷轧压下率对3003铝合金薄板和箔材组织及钎焊抗下垂性能的影响。结果表明:3003铝合金H14态薄板的再结晶晶粒尺寸明显大于H18态薄板的再结晶晶粒,且350℃以上温度退火,强度变化不大;冷轧压下率较小时,随着压下率增加晶粒尺寸迅速减小,压下率40%以上时,随着变形量增加,再结晶晶粒尺寸减幅不大; 3003铝合金箔材钎焊后的晶粒尺寸随压下率的减小而显著增大,冷轧压下率为20%~25%时抗钎焊下垂性能最佳。 相似文献
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针对TA1纯钛冷轧薄板在冲压网状板式换热器板片的过程中发生的开裂问题,采用光学显微镜、SEM扫描电镜及EDS能谱仪等实验手段,对薄板"表面褶皱"缺陷和开裂缺陷进行了分析。结果表明,冷轧薄板"表面褶皱"部位对应的心部组织处出现有纤维状层、缝隙和孔洞等缺陷,组织出现异常的原因主要是Al和Mo元素的富集。薄板的冲压开裂部位同样发现有Al和Mo等杂质元素的富集,其开裂形式为脆性分层断裂。综合分析结果可以推断,冲压过程中的开裂发生在冷轧薄板的"表面褶皱"缺陷部位,因此坯料中Al和Mo等杂质元素的混入是导致冲压开裂的根本原因。 相似文献
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近日,邯钢冷轧厂镀锌线生产的热镀锌板顺利通过了青岛海尔集团的各种性能测试,该公司已决定批量订货,用于生产高档家用电器。这标志着邯钢冷轧热镀锌板已经取得通向高端市场的通行证。邯钢冷轧热镀锌板最突出的优点是锌层附着力强,冲压变形后锌层非常稳定,冲压性能、表面质量、尺寸精度、板形、涂敷性能、包装等方面表现也很出色。 相似文献
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大变形冷轧Fe-6.5%(质量)Si高硅钢薄板组织性能的研究 总被引:1,自引:0,他引:1
Fe-6.5%(质量)Si合金具有优异的软磁性能,有着良好的发展前景。但由于该合金中有序相的出现,人们难以用普通轧制的方法得到该合金的薄板。本文利用热轧,温轧,冷轧方法,结合相关的热处理手段,得到该合金0.05 mm薄板。通过在不同温度下热处理,利用光学显微镜,扫描电镜,X射线仪,拉伸机,显微硬度仪,研究该薄板组织结构和力学性能的变化。利用磁滞回线仪研究薄板热处理前后直流磁性能的变化。通过研究发现,0.05mm轧态薄板具有一定的塑性,断裂强度高达1.93 GPa。热处理使薄板硬度降低,塑性降低,特别是在650℃以上,材料发生了再结晶后,变化尤为明显。究其原因是有序相B2向DO3的转变及〈001〉面织构的消失。 相似文献
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X.H. Gao K.M. Qi R.L. Li C.L. Qiu B. Ma G.R. Bai Department of Metal Forming School of Materials Metallurgy Northeastern University Shenyang China 《金属学报(英文版)》1999,12(5):811-815
1.IntroductionVerythingrainorientedsiliconsteelsheets(lessthan010mm)arewidelyusedascorematerialsfortransformersandpoletransformers.Ascorematerialsusedinhighfrequencyhavelargestartingfrequency,thelossofelectricenergyislargerthanthatofstaticmagnetic… 相似文献
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S. K. Paul U. Ahmed G. M. Megahed 《Journal of Materials Engineering and Performance》2011,20(7):1163-1170
Low-carbon Al-killed hot rolled strips for direct forming, cold rolling, and galvanizing applications are produced from the
similar chemistry at Ezz Flat Steel (EFS) through thin slab casting and rolling (TSCR) technology. The desired mechanical
and microstructural properties in hot bands for different applications are achieved through control of hot rolling parameters,
which in turn control the precipitation and growth of AlN. Nitrogen in solid solution strongly influences the yield strength
(YS), ductility, strain aging index (SAI), and other formability properties of steel. The equilibrium solubility of AlN in
austenite at different temperatures and its isothermal precipitation have been studied. To achieve the formability properties
for direct forming, soluble nitrogen is fixed as AlN by coiling the strip at higher temperatures. For stringent cold forming,
boron was added below the stoichiometric ratio with nitrogen, which improved the formability properties dramatically. The
requirements of hot band for processing into cold rolled and annealed deep drawing sheets are high SAI and fine-grain microstructure.
Higher finish rolling and low coiling temperatures are used to achieve these. Fully processed cold rolled sheets from these
hot strips at customer’s end have shown good formability properties. Coil break marks observed in some coils during uncoiling
were found to be associated with yielding phenomenon. The spike height (difference between upper and lower yield stresses)
and yield point elongation (YPE) were found to be the key material parameters for the break marks. Factors affecting these
parameters have been studied and the coiling temperature optimized to overcome the problem. 相似文献
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铝连续铸轧板冲压性能的改善 总被引:5,自引:2,他引:3
从分析铝铸轧坯组织和性能特点入手,通过调整化学成分,改进铸轧、冷轧工艺及热处理工艺,有效地改善了板材的深冲性能,使铝铸轧坯在冲压制品生产中得到更广泛应用。 相似文献