共查询到19条相似文献,搜索用时 78 毫秒
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日本为提高发电效率,电站锅炉蒸气条件已由超临界压向超超临界压发展,为满足需要,在现有奥氏体不锈钢管的基础上,改进和新研制出奥氏体不锈钢管及其合金管以及合会复合管。 相似文献
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介绍了新日铁公司为提高火力发电和焚烧垃圾发电效率,开发出的火力发电用NF616大直径厚壁钢管以及垃圾焚烧发电用各种奥氏体不锈钢管。 相似文献
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为进一步提高锅炉用不锈钢管的高温蠕变强度 ,耐高温腐蚀特性和耐蒸汽氧化特性 ,日本投入了大量的人力、物力、财力 ,对现有的SA2 13-TP30 4H、SA2 13-TP347H和SA2 13-TP310H三种奥氏体不锈钢进行改进 ,开发综合性能良好的超临界、超超临界锅炉用不锈钢管的新材料 ,即超级 30 4H、细晶粒TP347H(TP347HFG)和HR3C (TP310HCbN)三种新型不锈钢。1 超级 30 4H钢在矿物燃料锅炉中需要有经济性和高温性能好的奥氏体不锈钢材料制造过热器 ,为此 ,日本住友公司开发了超级 30 4H。超级 30 4H是在TP30 4H不锈… 相似文献
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日本不锈钢管超平滑拉拔技术的开发 总被引:1,自引:0,他引:1
半导体生产设备用的不锈钢管要求具有高的清洁性和内表面无尘埃、粗糙度低等特征,过去是采用(冷拔+光亮退火)或(冷拔+光亮退火+电解研磨)等方法生产。即使经过电解研磨,不锈钢管的内表面粗糙度Rmax仅∧1μm,且制作成本高。日本住友金属公司开发了带台阶顶头的超平滑拉拔技术,采用该技术生产的BAⅡ不锈钢管满足半导体设备用管的要求,其内表面粗糙度、发生尘埃指标均与电解研磨管相当,且制作成本大大降低。 相似文献
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高强钢制轻型高压气瓶 总被引:1,自引:0,他引:1
介绍了日丹诺夫冶金厂和全苏管材科研所将研制的 38CrNi3MoVA钢热轧成 Φ219mm × 10mm无缝钢管,用于制造- 50℃到+ 200℃、工作压力为 40MPa的高压气瓶的情况。此种气瓶经调质热处理后,具有很高的强度、良好的韧性和较高的抗软化及抗脆性破坏性能,其重量也比相同容量的普通气瓶轻。 相似文献
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D. L. Sponseller G. A. Timmons W. T. Bakker 《Journal of Materials Engineering and Performance》1998,7(2):227-238
Wrought tubes of T-11 steel, externally clad with SS310, have been produced by a new method (U.S. Patent 5,558,150). The alloys
were united directly from the molten state by centrifugal casting. In the optimum process, temperatures were controlled to
prevent meltback of the SS310 outer layer by the higher melting T-11 stream. Hollow extrusion billets were prepared from the
heavy-walled cast bimetallic tubes and successfully hot extruded (at a ratio of 13.4) to 84-mm (3.3 in.) OD X 64-mm (2.5-in.)
ID tubes, and (at a ratio of 37.6) to 51-mm (2-in.) OD X 38-mm (1.5-in.) ID tubes. In all, 10 castings were produced, and
12 billets were extruded to tubes. For the most part, thicknesses of the cladding and of the tube wall are rather uniform
around the circumference and from end to end of the tubes. Hardness and tensile properties of annealed 51-mm (2-in.) tubes
are uniform from end to end of a tube, and between tubes, and readily conform to ASTM A 213; tubes satisfy the flattening
and flaring requirements of ASTM A 450. The cladding is metallurgically bonded to the base metal, as revealed by metallography,
and by two tests developed for this study: a bond shear strength test and a twist test. In the latter test, rings 3.1 mm (0.125
in.) in thickness are slotted and severely twisted with a special tool. In tubes made by the optimum process, minute fissures
that form adjacent to some of the pressure points during twist testing occupy just 3 % of the bond-line length. Cost estimates
for commercial production of 51-mm (2-in.) tubes via the centrifugal casting route suggest that such tubes should be considerably
less expensive than conventionally clad tubes (extruded from composite billets assembled from heavy-walled wrought tubes).
This paper was originally presented at the ASM International Conference entitled, “Heat-Resistant Materials II”, held in Gatlinburg,
Tennessee, 11–14 September 1995 相似文献
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介绍了用于日本垃圾发电锅炉蒸气发生器、过热器的几种新开发管材的试验情况,以及试验方法、试验结果、不同涂镀方法的耐久性能。 相似文献
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I. P. Mozharenko L. A. Dolinskaya E. Ya. Veksler G. A. Legavets L. K. Gordienko Z. G. Fridman 《Metal Science and Heat Treatment》1976,18(1):3-5
1. | Mechanicothermal treatment of steel 12Kh1MF under the conditions given increases the dispersity of carbide particles without changing the phase composition of the metal and produces a polygonized substructure. The structural changes lead to an increase in the short-term strength characteristics of the steel at standard and high temperatures (up to 650°C). |
2. | Mechanicothermal treatment increases the time to failure of steel 12Kh1MF by 200–400% at all static stress levels tested. |
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保护地球环境的耐腐蚀高性能钢管的开发 总被引:1,自引:0,他引:1
介绍了日本川崎制铁公司为保护地球环境所生产的油井管、干线用管、锅炉用管和汽车用钢管的性能概况,重点介绍高耐蚀13Cr钢管、可焊性干线用管和HISTORY钢管的开发状况。 相似文献
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超超临界锅炉受热面管镜面焊接技术 总被引:2,自引:2,他引:0
镜面焊接技术就是在肉眼无法观察到的焊口位置附近放置一面镜子,通过观察镜子内的熔池的金属熔滴在生长过程中得到控制性操作的一种方法。通过使用镜面焊模拟实践来阐述其原理及操作方法,对其工艺难点进行了分析,并且该方法在实践中得到了成功应用。 相似文献