共查询到20条相似文献,搜索用时 62 毫秒
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采用不同石蜡含量的多聚合物组元粘结剂,研究石蜡含量对喂料粘度、生坯密度均匀性、和坯强度的影响。结果表明,石蜡含量的提高改善了喂料的均匀流变性能,但降低生坯的抗破坏能力。因此,可根据注射成形部件来选择适宜的蜡基粘结剂。 相似文献
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利用拉伸强度大于980MPa等温淬火的0.4C-Si-1,2Mn薄板钢研究了残余奥氏体对冲压成形性的影响。结果表明,成形性和残余奥氏体的初始体积分数(V70)之间具有似乎合理的关系。随着V70孔性逐渐得到改善,在V70为0.15~0.2时达到最好。另一方面,在小于0.15~0.2V70时,随着V70的增加,冲妃的扩孔性能略有降低。在超出0.2V70时的拉伸成形性以及超出0.15~0.2V70时的其 相似文献
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采用不同石蜡含量的多聚合物组元粘结剂,研究石蜡含量对喂料粘度、生坯密度均匀性、生坯强度的影响。石蜡含量提高改善了喂料的均匀流变性能,但降低了生坯的抗破坯能力。研究结果为蜡基粘结剂的合理选择提供了依据。 相似文献
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影响合金化热镀锌钢板成形性的因素 总被引:3,自引:0,他引:3
合金化热镀锌钢板的成形性既取决于基体钢板的特性,也决定于镀层本身的成分和结构。本文综述了以上两方面因素对合金化热镀锌钢板成形性的影响特点及其作用机理,同时也讨论了热镀锌工艺条件对镀层组织结构以及成形性能的影响规律。 相似文献
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深冲08Al钢的成分工艺对成品成形性的影响 总被引:1,自引:0,他引:1
阐述了深冲08Al薄钢板的质量概念,并从理论上分析了化学成分、热轧、冷轧、退火及平整等工艺对成形性,即对有利织构的形成与发展的影响,提出了工业生产08Al深冲板的最佳成分与工艺参数。 相似文献
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铜材在电力、汽车、建筑、交通运输等产业中均扮演重要角色。制造业的兴衰与生活质量的变化是决定铜需求量的主要原因。本文阐述了铜的产品类别及性能特点;铜与铜合金性能及废铜再生;重点介绍了铜在汽车上的典型部件-水冷发动机散热器。 相似文献
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LEIJunxiang 《钢铁研究学报(英文版)》2004,11(5):44-49
Based on the deformation characteristic of regular polygonal box stamped parts and the superfluous triangle material wrinkle model, the criterion of regular polygonal box stamped parts without wrinkle was deduced and used to predict and control the wrinkle limit. According to the fracture model, the criterion of regular polygonal box stamped parts without fracture was deduced and used to predict and control the fracture limit. Combining the criterion for stamping without wrinkle with that without fracture, the stamping criterion of regular polygonal box stamped parts was obtained to predict and control the stamping limit. Taken the stainless steel 0Cr18Ni9 (SUS304) sheet and the square box stamped part as examples, the limit diagram was given to predict and control the wrinkle, fracture and stamping limits. It is suitable for the deep drawing without flange, the deep drawing and stretching combined forming with flange and the rigid punch stretching of plane blank. The limit deep-drawing coefficient and the minimum deep-drawing coefficient can be determined, and the appropriate BHF (blank holder force) and the deep-drawing force can be chosen. These provide a reference for the technology planning, the die and mold design and the equipment determination, and a new criterion evaluating sheet stamping formability, which predicts and controls the stamping process, can be applied to the deep drawing under constant or variable BHF conditions. 相似文献
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冲压成形是金属板材加工异形件的最基本方式。金属材质不同,冲压成形异形件的难易程度不同,主要影响因素是冲压成形性能和冲压成形极限。文章结合铍板材的冲压成形性能和冲压成形极限,对铍板材冲压成形异形件的难易性作了探讨。 相似文献
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简述了研究汽车用钢的意义,通过国内外标准主要指标的对比,找出了我国汽车用热轧钢、冷轧钢及镀层钢板标准存在的问题及解决办法. 相似文献
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铈对工业纯铝冲压性能和耐蚀性能的影响 总被引:1,自引:0,他引:1
研究了加铈与不加铈的工业纯铝板的冲压性能和耐蚀性能。试样经轧制退火后在室温条件下作拉力试验,取得常规条件下的屈强比 σ0.2/σb,加工硬化指数n、板厚方向性系数γ、均匀延伸率εb和板平面方向性Δγ,找出铈含量对工业纯铝板冲压性能的影响。 相似文献
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对不同退火温度下SPCC带钢试样的金相分析表明,SPCC钢在600℃退火时已经发生再结晶,680~720℃,晶粒均匀且存在一定数量的饼形晶粒,超过720℃时,晶粒长大;冷轧板压下率分别为73.85%及70%时,也表现为晶粒均匀的组织;对应的综合力学性能最好。通过优化冷轧总压下率为70%~78%,优化罩式退火工艺参数,衡量SPCC退火卷冲压性能的屈强强度、抗拉强度、伸长率、n值、r值、IE值等指标明显提高,工艺稳定性增强,因性能导致的不合格率降低了2.68%,年减少质量异议损失12.5万元。 相似文献
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Direct and indirect hot stamping presently constitutes one of the most innovative forming technologies in the automotive industry through the combination of forming and hardening in one process step or line. Thus, structural components with strength up to 1600 MPa can be accomplished with the quench hardenable ultra‐high strength steel 22MnB5. With respect to the numerical investigation of the feasibility of different parts the knowledge of various thermal and mechanical material characteristics determined under process relevant conditions are required. Within the scope of this paper different experimental methods will be introduced for the determination of material properties according to the typical time‐temperature characteristics of the hot stamping process, as well as the modelling of it as input data for the FE analysis. 相似文献