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介绍了当前在拉拔、挤压、冲裁、等温锻造等各类模具中应用的陶瓷材料如金属陶瓷、ZTA,TZP,TZP/Al2O3,TZP/TiC/Al2O3,Al2O3/TiC,PSZ,Si3N4,Sialon等使用性能方面的研究现状,探讨了陶瓷模具材料研究与应用中存在的问题,展望了陶瓷模具材料的应用前景。提出陶瓷模具材料的增韧补强、模具结构优化设计和表面陶瓷化改性技术等将是提高陶瓷模具使用性能的有效措施,而且随着模具技术的迅猛发展,其应用前景也将日益广阔。 相似文献
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陶瓷模具模芯通常采用 Cr12MoV制做,强度高,耐磨性良好。正常情况下,其使用寿命为 35~ 40万次。模芯的刃口部分由于受到坯料微粒的磨损,并承受一定的压力和冲击力,很容易损坏。失效形式主要为刃口部位磨损和由疲劳或碰撞模具衬板导致的刃口崩裂。若失效后直接报废换用新的备品,生产成本很高。但若进行修复处理,则只要将失效部位堆焊一层耐磨合金,经简单研磨放电加工重加橡胶即可。目前 300 cm× 300 cm的 Cr12MoV新制芯约 1 700元 /块,而修复处理同规格模芯费用只需约 500元 /块。选用适当的焊材、设计合理的工艺,修复件… 相似文献
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全面综述了表面镀层、表面复合、表面涂覆等表面改性技术在各类陶瓷模具中应用、研究的现状。指出:表面改性技术既能发挥陶瓷材料的高硬度、高耐磨和耐高温等的优势,又能发挥金属基体高强度、高韧性的特点,从而使得陶瓷模具材料具有良好的使用性能,具有广阔的应用前景。今后研究的重点是如何通过表面改性工艺的控制和复合层材料的合理选择和设计,使得所形成的陶瓷复合层与金属基体结合强度高,硬度高,既减摩又耐磨。 相似文献
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陶瓷表砖模具的国产化 总被引:1,自引:0,他引:1
<正> 从意大利引进的陶瓷表砖生产线上的陶瓷表砖模具,是生产线的最易损部分,它的结构见图1。它包括框架、塞板、上模和下模四部分。1个框架固定在压机的工作台上,28块塞板分别用螺钉固定在框架上,7块上模用 相似文献
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介绍了当前在拉拔、挤压、冲裁、等温锻造等各类模具中应用的陶瓷材料如金属陶瓷、ZTA,TZP,TZP/Al2O3,TZP/TiC/Al2O3,Al2O3/TiC,PSZ,Si3N4,Sialon等使用性能方面的研究现状,探讨了陶瓷模具材料研究与应用中存在的问题,展望了陶瓷模具材料的应用前景.提出陶瓷模具材料的增韧补强、模具结构优化设计和表面陶瓷化改性技术等将是提高陶瓷模具使用性能的有效措施,而且随着模具技术的迅猛发展,其应用前景也将日益广阔. 相似文献
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阐述了微注射成型技术的最新进展,重点介绍了微注射成型机和模具、微注射工艺、成型材料的研究现状,展望了微注射成型的发展趋势。 相似文献
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陶瓷粉体表面化学镀技术 总被引:3,自引:0,他引:3
本文综述了陶瓷粉体表面化学镀技术的一般方法,研发现状与应用前景,介绍了化学镀技术的过程及其影响因素,展望了陶瓷粉体表面金属化学镀技术的发展前景. 相似文献
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Investment casting has been widely recognized as the best option in producing TiAl components with key benefits of accuracy,versatility and integrity.The collapsibility of ceramic moulds for investment casting is critical in the manufacturing process of TiAl components due to TiAl’s intrinsic brittleness at room temperature.The aim of the present research is to provide a method for production of TiAl components by investment casting in ZrO2 ceramic moulds with improved collapsibility.Slurries prepared with high polymer additions were utilized during the preparation of ceramic moulds.The stress/strain curves obtained from green and baked ceramic moulds demonstrate that the green strength was increased with the application of high polymer,while baked strength decreased,thus the collapsibility of ceramic moulds was improved.It is suggested that this result is related to the burn-out of high polymer which left a lot of cavities.The experimental findings were also verified by the investment casting of "I"-shaped TiAl components. 相似文献
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分析了酶箱的生产工艺,通过比较模具设计方案,选择模具结构好、操作方便、塑件质量和经济性较好的方案制作了模具,并制定了旋塑生产工艺,生产出了合格塑件。 相似文献
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Designing ceramic components for structural applications 总被引:1,自引:0,他引:1
D. R. Bush 《Journal of Materials Engineering and Performance》1993,2(6):851-862
Despite significant advances in the properties of structural ceramic materials in recent years, ceramics are not being utilized
to their fullest potential due to their inherent brittle nature and a general lack of understanding of how to design reliable
ceramic components. The characteristics of ceramics are much different from those of metals, and the design process must account
for those differences. Weibull statis-tical analysis, in conjunction with finite element analysis, provides a basis for designing
reliable ceramic components. 相似文献
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In general, due to ceramic’s high hardness, which makes machining operations extremely difficult and very expensive, ceramic
components are formed in shapes very close to the final ones. Considering this, a manufacturing process, based on a sol-gel
reaction that allows rapid production of ceramic components in the final shape with a low level of shrinkage was developed.
Although the ceramics obtained presented good behavior in short-term contact with molten aluminum alloys, there was no guarantee
that the components produced would have adequate continuous resistance to chemical and erosive wear by liquid metals. To enhance
their resistance, the ceramic parts were coated by flame spray. Different powders and conditions were used to determine the
degree of coating adhesion to the substrate. The coated specimens were then submerged in a molten aluminum bath, at different
temperatures and time settings, to evaluate the interaction between the ceramic components and the molten aluminum alloys. 相似文献