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汽车用热镀锌钢板镀层的性能综述 总被引:2,自引:1,他引:1
对汽车用热镀锌钢板镀层的耐腐蚀性、成型性、焊接性和涂装性等几个重要的性能进行了介绍,同时介绍了国内外对汽车用热镀锌钢板镀层性能研究的最新进展。展望了对这些性能研究的新的方法与方向。 相似文献
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模具与冲压件间的摩擦磨损性能极大地影响冲压件的质量。为了提高汽车用热镀锌钢板的冲压成形性能,采用含多种无机离子的润滑剂对热镀锌钢板表面进行润滑处理。通过摩擦因数测量和拉深试验方法分别研究了热镀锌钢板的表面摩擦特性与冲压成形性能。结果表明:经无机润滑处理的热镀锌钢板表面摩擦因数明显降低、具有良好的表面润滑性能与稳定的摩擦特性;拉深试验时其最大拉深力下降、最大拉深杯体高度增大,即钢板的冲压成形性能得到了提高。 相似文献
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磷化膜与阴极电泳涂膜的配套性研究 总被引:2,自引:0,他引:2
为解决汽车阴极电泳涂装的质量问题,探索了磷化膜在阴极电泳涂装过程中的微观变化及其对涂层性能的影响;研究了磷化膜结构及组成(P比)对阴极电泳涂膜性能的影响,获得了评价磷化膜与阴极电泳涂膜配套性的最有效的方法。 相似文献
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热浸镀锌钢板表面粗糙度、无铬耐指纹钝化后锌层的均匀性及锌渣等表面状况直接影响着镀锌钢板漆膜层的各项性能;热浸镀锌钢板表面的粗糙度对钝化膜的性能有影响,进而影响耐指纹热镀锌钢板的涂漆附着力和耐蚀性能.采用SEM,EDS,EPMA等方法,对耐指纹热镀锌钢板进行分析,找出了漆膜性能与镀锌钢板表面粗糙度之间的关系,发现锌层的不... 相似文献
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论述了电泳涂装前处理、电泳涂装、电泳后清洗、电泳涂膜的烘干等汽车车身阴极电泳涂装工艺及正常生产时阴极电泳涂装生产现场和电泳槽液的控制要点. 相似文献
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阴极电泳涂装配套用磷化剂的研究 总被引:1,自引:0,他引:1
为了解决阴极电泳涂装对磷化的特殊要求和磷化过程中的环境保护问题,研究出一种与阴极电泳涂装配套的磷化剂,优化并研制了新型复合有机促进剂,解决了传统的NaNO2促进剂对环境的污染问题;确定了酸度、温度等最佳工艺条件,测定了磷化膜的晶型结构和相关性能.结果表明,新型环保磷化剂磷化速度快、温度低、沉渣少、寿命长,所得磷化膜为颗粒状聚晶型体结构,膜薄而致密,耐碱性强,与阴极电泳涂装配套性能优异,涂层附着力强,耐腐蚀性能优异. 相似文献
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介绍了覆铝锌板的镀层性能特征以及切口的腐蚀状况.针对覆铝锌板切口腐蚀进行了多种切口防锈处理方法尝试.通过盐雾试验方法,筛选出综合性能较优的切口防锈处理方式为:有机硅防锈. 相似文献
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Hongying GONG Wei ZHU Zhiliang ZHANG Zhenliang LOU China National Mold & Die CAD Engineering Research Center Shanghai Jiao Tong University Shanghai China 《材料科学技术学报》2005,21(4):531-535
A probe test method was employed to detect the friction condition of the interfaces between tools and blank. At the same time a self-developed measurement apparatus to realize the probe test method was also presented. Based on the analysis of force, a correlative friction model was also given. With the self-developed measurement apparatus, the effects of three kinds of lubricating oils which were in common use during the process of sheet steel drawing were studied. By probing the friction coefficient values of different lubricating oils during the drawing process of the hot-galvanized sheet steel (steel brand: ST07Zn), we can see that the friction caused by PK oil was the lowest, so the effect of PK oil was the best. Then PK oil was used as the base lubricating oil and some solid additive powers was added into it to make a new type lubrication (named as L oil).The result of test proved that the new lubricating oil had remarkable effect on the drawing process of hot-galvanized sheet steel. 相似文献
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通过对钢板桩各弯弧位置进行力学检验,以及设计钢板桩锁口拉伸失效实验,并利用光学显微镜观察弯弧处的组织晶粒度变化,综合分析冷弯U型钢板桩的性能。结果认为生产冷弯钢板桩时,截面危险位置出现在内部,而非两端锁口最大弯弧角处;生产冷弯钢板桩时,每个弯弧外的表面晶粒沿宽度方向被拉长,弯弧的内表面晶粒沿厚度方向被挤压拉伸;钢板桩锁口的拉伸失稳过程出现两处明显失效,两种失效方式可用于不同用途的钢板桩冷弯性能检验。 相似文献
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高聚物夹层材料对层压减振复合钢板拉伸剪切强度的影响 总被引:1,自引:0,他引:1
研究了高聚物夹层材料对层压减振复合钢板的拉伸剪切强度的影响。结果指出,高聚物夹层材料较厚时,层压减振复合钢板的拉伸剪切变形规律与高聚物夹层材料的一致;高聚物夹层厚度较小时,复合钢板的拉伸剪切强度较高。与酚醛树脂氯丁橡胶相比,聚氨酯作夹层的层压减振复合钢板具有较高的拉伸剪切强度。 相似文献
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The painting effect of products would be affected if the bright spots happen on the surface of electro-zinc coated sheet. The defects of bright spots are researched by macroscopical observation, scanning electronic microscope, X-ray energy spectrometer, metallography microscope and the electron back-scatter diffraction (EBSD). The result shows that the defects of bright spots are inherited by mixed-grains on the surface of primary steel sheet. It could be solved by controlling the annealing temperature of cold-rolled steel sheets, increasing the rolling reduction or strain rate when the sheets are rolled and uniform heat treatment to the original austenite grains in the continuous metal casting blank.Electro-zinc coated steel sheets are widely used in automobile and apparatus industry. The appearance is more instruct besides its mechanical and corrosion resistant property. Some tiny defects would affect the painting effect of products. Once the bright spot defects were found on the surface of electro-zinc coated steel sheet in some steel works and the appearance of electro-zinc coated steel sheets become bad. In order to finding how the bright spots happened and how to eliminate the defects in the end, rounded analysis is made by some inspections. 相似文献
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The tensile-shear failure zone of the laminated damping steel sheet was investigated by scanning electron microscopy and X-ray photoelectron spectroscopy.It is found that there exists cohesive failure in polymer sandwich and sub-boundary failure between the steel sheet and the polymer.The sub-boundary layer is dominantly polymer material.The tensile-shear failure of the laminated damping steel sheet is a process during which the crazes form,grow up and merge into cracks. 相似文献
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目的现有2219铝合金板材宽度不能满足大型复杂曲面件整体流体高压成形需要,仍需采用焊接方法制备成形坯料,焊缝的存在导致铝合金拼焊板整体性能不均匀,影响成形性能及壁厚分布。方法提出2219铝合金拼焊板的双层板流体高压成形方法,采用1.8 mm厚铝合金拼焊板作为内层板,1mm厚不锈钢板作为外层板,进行双层板胀形实验研究。对比分析了单层板与双层板条件下2219铝合金拼焊板的成形极限、应变及壁厚分布。结果外层板的存在能够使板材的极限成形高度和极限应变增加,同时使壁厚分布更加均匀。结论双层板之间存在界面摩擦,可以提高内层拼焊板的成形极限、改善壁厚分布。 相似文献
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1. IntroductionIt is well known that increasing the St content improves the soft magnetic properties of St steel sheet.Steel sheet containing about 6.5% St exhibits excelledssoft magnetic properties. However, increasing the St.content makes the steel brittl.11]. A steel containingmore than 4.5% St has no elongation at room temperature, and a thin sheet cannot be made by coldrolling.Recently, the siliconning method to manufacture6.5% St steel sheet has been developedl2]. As a result,6.5% St… 相似文献