共查询到20条相似文献,搜索用时 125 毫秒
1.
本文提出采用Fe-C化合物钢粉取代目前以铁粉为主体的金属结合剂制备金刚石锯片节块从而解决铁粉在春天梅雨季节容易氧化,及耐磨度的问题,生产优势产品. 相似文献
2.
铁基金刚石圆锯刀头的关键成份对其锯切性能的影响《金刚石与磨料磨具工程》2000.№.4.P15 通过对比研究铁基金刚石圆锯刀头的表面形貌、磨损状况、金刚石周边成分的能谱分析,揭示其关键成分——金刚石的组成、铁粉的粒度、强碳化物元素对锯片锯切性能的影响,为提高锯片的性能价格比提供简易可行的参考依据。 相似文献
3.
湖北宜昌黑旋风锯业股份有限公司主营业务是金刚石锯片基体、硬质合金锯片基体、金刚石薄壁钻基体、金刚石磨轮基体、金刚石框架锯条及基体的研发、生产和销售。其主要产品是金刚石锯片基体和硬质合金锯片基体。除锯片基体外,公司还生产少量的薄壁钻基体、磨轮基体和框架锯条及基体。金刚石锯片基体的收入约占公司收入总额的80%,是公司主导产品。公司前身锯片厂设立于1992年。自设立以来,公司一直专注于金刚石锯片基体和硬质合金锯片基体 相似文献
4.
介绍了金刚石锯片的磨损机理,分析了金刚石锯片失效形式和原因,探讨了影响金刚石锯片性能的主要因素,提出了金刚石锯片的改进方法。 相似文献
5.
张荣清 《金刚石制品与石材加工信息通报》1996,(3):30-33
本文主要介绍了金刚石锯片的发展过程,以及我国现阶段金刚石锯片的种类,性能及使用情况,同时还介绍了金刚石组锯,带锯和绳锯的使用,最后阐述了对我国金刚石锯片今后发展方向的展望。 相似文献
6.
7.
8.
本文介绍了金刚石锯片基体产生裂纹机理,分析了原材料缺陷、热处理工艺、淬火介质等因素对金刚石锯片基体产品质量的影响,为金刚石锯片生产企业改善车间生产安全提供了有益的建议。 相似文献
9.
本文从金刚石圆盘锯片切割过程中的受力分析出发,研究了焊接质量对金刚石锯片刀头和基体结合强度的影响。能过分析,提出了在生产中控制焊接质量的措施,实践证明,这些措施是可行和有效的。 相似文献
10.
11.
12.
A.J. Alexander B.P. Holownia 《Journal of Wind Engineering & Industrial Aerodynamics》1978,3(4):343-351
Tests have been made in a wind tunnel on a number of Savonius rotor configurations in wind speeds of 6–9 m/s. The variables tested were blade aspect ratio, blade overlap and gap and the effects of adding end extensions, end plates and shielding.For low aspect ratios (~1) with no additions the efficiency was low (~0.065) but for higher aspect ratios (~5) with optimum blade configuration and shielding a maximum value of efficiency of 0.25 was obtained. Tests with three and four bladed configurations gave appreciably lower values of efficiency.A special study was made of wind tunnel corrections for blockage ratios up to 0.3. 相似文献
13.
尼尔·莱斯姆森 《智能建筑电气技术》2007,1(1):1-85
制定数据中心功率密度规范的传统方法不仅含糊不清,而且容易误导用户。使用W/ft2或W/m2来描述数据中心的功率密度不足以确定数据中心的供电或制冷能力是否满足高密度计算负载(例如,刀片式服务器)的要求。在以前,没有一种明确而标准的方法可用来指定数据中心在高密度负载条件下实现可预期的行为。一个适当的数据中心功率密度规范应该能够确保数据中心符合预期的高密度负载的要求,能够为设计、安装供电和制冷设备提供明确的指示,能够防止过度规划,并能够使用电效率最大化。本文就制定数据中心供电和制冷基础设施规范的改进方法在科研领域和实际生产中的应用进行了说明。 相似文献
14.
ABSTRACTBest pitch position of each blade in the rotation of turbine at different azimuth angle has been calculated at different Tip Speed Ratios (TSRs) by using the aerodynamic analysis. This paper analyses and optimises the various design parameters and its influence on the starting turbine by itself, power coefficient and overall performance of the Vertical Axis Wind Turbine (VAWT). The results indicate that the best pitch position blade method improves the self-starting capacity and power coefficient. The best position blade pitching curve-1 gives maximum power coefficient at 45° pitch angles for TSRs of 0.5 and the best position blade pitching curve-5 with 15° pitch angle gives maximum coefficient of power about 0.49 for TSRs at 2.5. The results indicate that the variation of pitch angle from 45° to 10° with six best position blade pitching curves give the maximum power coefficient for TSRs from 0.5 to 3. 相似文献
15.
The organobentonite (CTMA-Bent) was prepared from Na+-saturated bentonite (Na-Bent) by intercalation with cetyltrimethylammonium bromide (CTMA), and used as a carrier of nanoscale zero valent iron (NZVI) for the removal of atrazine. The NZVI/CTMA-Bent composite was characterized by X-ray diffraction (XRD) and transmission electron microscope (TEM), and good dispersion of nanoscale iron particles on the carrier was observed. The removal efficiency of atrazine by this composite was compared with that by commercial iron powder and NZVI itself. For both treatments by NZVI and NZVI/CTMA-Bent, the removal efficiency increased as the pH of the solution decreased, and the removal percentage of atrazine by NZVI/CTMA-Bent reached 63.5% at initial pH = 5.0 after 120 min. It is not only much higher than that (26.6%) by NZVI containing the same amount of iron, but also superior to the sum (32.1%) of reduction by NZVI plus adsorption by CTMA-Bent (5.5%). Besides, the NZVI/CTMA-Bent has a good long-term stability, and the carrier CTMA-Bent could prevent the iron ions (the byproduct of dechlorination) from leaching into the solution. 相似文献
16.
Dr N-M Ntoko 《国际自然能源杂志》2013,34(2):105-107
The total-to-static efficiency is used as a basis to obtain expressions for the optimum outlet blade angle and for the axial interference factor of a Horizontal Axis Wind Turbine (HAWT) turbine blade ring. The analysis presented confirms that power output and axial velocity can indeed have substantially higher values for some HAWT turbines. 相似文献
17.
为弄清尿素是否有阻锈作用,用包括尿素在内的各种外加剂配制的不同掺量的外加剂浸渍液进行了长达四年的金属试件浸泡试验,得出了尿素不能有效地抑制氯离子对铁的腐蚀的明确结论。 相似文献
18.
19.