{"currentpage":1,"firstResult":0,"maxresult":10,"pagecode":5,"pageindex":{"endPagecode":5,"startPagecode":1},"records":[{"abstractinfo":"Cr25Ni35Nb and Cr35Ni45Nb alloys are usually used in the <span style=\"color:red\">ethylene</span> cracking furnaces. However, premature failure of <span style=\"color:red\">furnace</span> tubes often occurs ahead of design life due to elevated temperature exposure conditions (1050--1100 ℃) and aggressive service environment. Effects of exposure temperature and time on microstructure and mechanical properties of Cr25Ni35Nb and Cr35Ni45Nb steel at aging temperature (1200 ℃) with various exposure time were simulated different service times at 1050 ℃. Change of mechanical properties at room temperature and elevated temperature (900℃) of the aged Cr25Ni35Nb and Cr35Ni45Nb steel were investigated. Under exposure at 1200 ℃, ultimate tensile and yield strength, elongation of Cr35Ni45Nb steel increase initially and then decrease, however, strength and ductility of Cr25Ni35Nb steel decrease with aging time increasing. Large amount of fine secondary carbide particles precipitated and dispersed in matrix of Cr35Ni45Nb steel, which increased strength and ductility for dispersion strengthening. However, the effect of the dispersion strengthening is weakened by needle-like secondary carbides. Strength and ductility decreased with fine secondary carbide particles growing. For Cr25Ni35Nb steel, few fine secondary carbide particles precipitated and dispersed in the matrix, and needle-like secondary carbides generated in the matrix, which causes strength and ductility decreased with aging time increasing.","authors":[{"authorName":"Limin SHEN","id":"7f564cd0-85d2-433d-9bd6-1695c9366f06","originalAuthorName":"Limin SHEN"}],"categoryName":"|","doi":"","fpage":"235","id":"d2ab75df-066a-46c3-9075-3fe034ae745a","issue":"3","journal":{"abbrevTitle":"JSXBYWB","coverImgSrc":"journal/img/cover/amse.jpg","id":"49","issnPpub":"1006-7191","publisherId":"JSXBYWB","title":"金属学报(英文版)"},"keywords":[{"id":"9c8c170f-ed6e-41f6-b3ed-f69a5601c9b6","keyword":"Aging treatment","originalKeyword":"Aging treatment"}],"language":"en","publisherId":"1006-7191_2011_3_2","title":"Effects of aging treatment on microstructure and mechanical properties of Cr25Ni35Nb and Cr35Ni45Nb <span style=\"color:red\">furnace</span> <span style=\"color:red\">tube</span> steel","volume":"24","year":"2011"},{"abstractinfo":"Coke deposited oil the inner wall of industrial HP cracker tubing during the cracking of ethane has been investigated in detail to elucidate the mechanism of the coking process. The outer hall of the deposit, adjacent to the metal <span style=\"color:red\">tube</span>, consists of filamentary coke. Lamellar coke occupies the central :one of the deposit, while the inner zone, adjacent to the reaction gases, is comprised of coke particles. The formation of the filamentary coke at the <span style=\"color:red\">tube</span> wall is closely related to composition of the <span style=\"color:red\">tube</span> material, but both the lamellar coke and the coke particles are derived from the gets phase reactions so bear no relation to the <span style=\"color:red\">tube</span> material. The difference in morphology between the lamellar and particulate types of coke is attributed to changes in the coking process. Possible ways to alleviate or prevent coking of the <span style=\"color:red\">tube</span> include reduction of the catalytic activity of the material at the inner wall of the <span style=\"color:red\">tube</span> and improvement of the <span style=\"color:red\">ethylene</span> steam cracking process. (C) 2001 IoM Communications Ltd.","authors":[],"categoryName":"|","doi":"","fpage":"121","id":"585e30b6-a3ea-4d89-bcb7-66206e0c7c60","issue":"2","journal":{"abbrevTitle":"BCJ","id":"e060bc2d-0280-4684-bb11-1ba5abfb13a5","issnPpub":"0007-0599","publisherId":"BCJ","title":"British Corrosion Journal"},"keywords":[{"id":"e121d94b-99b9-4321-8f64-4bc1e381df37","keyword":"carbon deposition;growth;nickel;carburization;iron;coke","originalKeyword":"carbon deposition;growth;nickel;carburization;iron;coke"}],"language":"en","publisherId":"0007-0599_2001_2_1","title":"Coking of HP tubes in <span style=\"color:red\">ethylene</span> steam cracking plant and its mitigation","volume":"36","year":"2001"},{"abstractinfo":"Some <span style=\"color:red\">furnace</span> tubes made of the austenitic stainless steel 1Cr18Ni9Ti for heating crude oil ex- hibited leakage and were on fire in a refinery.Cor- rosion failure analysis was conducted to explore the cause of failure.Macro-and microexamination in- dicated the failure to be stress corrosion cracking by chloride and sulphide with cracks initiating on the inner surface in weld or heat affected zone.Veri- fying tests demonstrated that the cracks occurred during operating period.The cause of failure was related to the critical situation of the refinery:lack of desalination equipment,lots of steam with liquid film on inside <span style=\"color:red\">tube</span> walls owing to mixing crude oil with a great amount of water,increasing decompo- sition of inorganic salts and lowering the tempera- ture in <span style=\"color:red\">furnace</span> tubes.","authors":[{"authorName":"ZHU Ziyong ZHOU Xiangyang GU Jianfan KE Wei Corrosion Science Laboratory","id":"db89ed79-fa19-46b2-a1de-3a0b4dc3e0ae","originalAuthorName":"ZHU Ziyong ZHOU Xiangyang GU Jianfan KE Wei Corrosion Science Laboratory"},{"authorName":"Academia Sinica","id":"8d5f6f0d-2ec5-4ad4-8e58-93d7e6888372","originalAuthorName":"Academia Sinica"},{"authorName":"Shenyang","id":"fbab2363-6c8b-4e1b-aeba-1b8840d7b502","originalAuthorName":"Shenyang"},{"authorName":"110015","id":"9c234a6c-cc04-4dec-bb9c-87a921664ca6","originalAuthorName":"110015"},{"authorName":"China","id":"06ec1d44-c359-4071-a122-39b5474619d8","originalAuthorName":"China"}],"categoryName":"|","doi":"","fpage":"20","id":"8d111722-ef86-4de5-83dc-bdac6fb348cb","issue":"1","journal":{"abbrevTitle":"CLKXJSY","coverImgSrc":"journal/img/cover/JMST.jpg","id":"11","issnPpub":"1005-0302 ","publisherId":"CLKXJSY","title":"材料科学技术（英文）"},"keywords":[{"id":"d1163358-8e06-4855-9885-f22d4d8f9df9","keyword":"stress corrosion cracking","originalKeyword":"stress corrosion cracking"},{"id":"1dba476f-4281-494a-8ace-0d4282cbb2bb","keyword":"null","originalKeyword":"null"},{"id":"b21ec98c-082f-420b-8c85-74ab506e1f3a","keyword":"null","originalKeyword":"null"},{"id":"6f533190-b697-4902-9b7c-1a7e5d7ba10e","keyword":"null","originalKeyword":"null"}],"language":"en","publisherId":"1005-0302_1992_1_7","title":"SCC of Stainless Steel <span style=\"color:red\">Furnace</span> Tubes in a Heating <span style=\"color:red\">Furnace</span>","volume":"8","year":"1992"},{"abstractinfo":"The rectification of eccentricity was revealed to be more effective in <span style=\"color:red\">tube</span> sinking than drawing with a mandrel.The ratio of thickness to diameter of <span style=\"color:red\">tube</span> blank on both sides of thick and thin wall seems to be the principal influential factor in rectifying eccentricity.The greater the ini- tial outside diameter and the initial wall thickness difference are and the less the initial wall thickness of the <span style=\"color:red\">tube</span> blank is,the better the rectification is.","authors":[{"authorName":"YAO Ruohao ZHONG Jianhua HUANG Jianfang ZHANG Ruhua South Institute of Metallurgy","id":"59ccf0e7-7ef2-4b49-98d5-13d291fc5328","originalAuthorName":"YAO Ruohao ZHONG Jianhua HUANG Jianfang ZHANG Ruhua South Institute of Metallurgy"},{"authorName":"Ganzhou","id":"37eab17f-0ce7-4dbc-ac0d-a4d53419bcee","originalAuthorName":"Ganzhou"},{"authorName":"Jiangxi","id":"3f346cef-2bef-40be-b8d6-fd85e110e717","originalAuthorName":"Jiangxi"},{"authorName":"China","id":"4c4c76e6-475c-43a2-86bb-0998f75b1d42","originalAuthorName":"China"}],"categoryName":"|","doi":"","fpage":"184","id":"5fa3245d-c568-4e79-a260-7e3bec4a1e22","issue":"9","journal":{"abbrevTitle":"JSXBYWB","coverImgSrc":"journal/img/cover/amse.jpg","id":"49","issnPpub":"1006-7191","publisherId":"JSXBYWB","title":"金属学报(英文版)"},"keywords":[{"id":"ece7f7de-a230-4cb6-982d-b88b1ada2f0f","keyword":"sinking <span style=\"color:red\">tube</span>","originalKeyword":"sinking tube"},{"id":"d25fb62e-614d-4b42-8bf2-ad3dad4870ac","keyword":"null","originalKeyword":"null"},{"id":"5f3ffe66-2bf5-4320-a85b-8a1a7e245c66","keyword":"null","originalKeyword":"null"}],"language":"en","publisherId":"1006-7191_1991_9_11","title":"ECCENTRICITY CHANGE IN <span style=\"color:red\">TUBE</span> SINKING","volume":"4","year":"1991"},{"abstractinfo":"A synthesis route of using calcium hydroxide Ca(OH)2 with <span style=\"color:red\">ethylene</span> glycol solvent and orthophosphoric acid (H3PO4) as reagents is described. Three ratios of <span style=\"color:red\">ethylene</span> glycol to distilled water 1:0, 1:1 and 0:1 are used as diluting media for Ca(OH)2. Crystals of different morphology and composition are formed under weak alkaline circumstance at pH 7.0$\\sim$8.0. Acicular calcium phosphate nanocrystals are prepared in pure <span style=\"color:red\">ethylene</span> glycol while rod-like calcium phosphate nanocrystals form in pure distilled water. The nanograde size of the former is smaller than that of the latter. Calcium-deficient apatite (CDAP) is obtained with a Ca/P molar ratio of 1.66. Therefore, it was deduced that the usage of <span style=\"color:red\">ethylene</span> glycol solvent could influence the formation of calcium phosphate crystal lattice.","authors":[{"authorName":"Yi ZUO","id":"a7ef26a8-fe8e-42da-bc9c-6a3000fbbc7f","originalAuthorName":"Yi ZUO"},{"authorName":" Yubao LI","id":"3a438650-02ec-420b-a10f-7ac7285f8641","originalAuthorName":" Yubao LI"},{"authorName":" Jie WEI","id":"698d20a5-594b-43cd-bad3-9e1de9b8117f","originalAuthorName":" Jie WEI"},{"authorName":" Yonggang YAN","id":"9bc8f409-269c-49f6-8ba9-6be2c153cbf7","originalAuthorName":" Yonggang YAN"}],"categoryName":"|","doi":"","fpage":"628","id":"4d95e53d-8e81-4714-9075-16c0b02a9095","issue":"6","journal":{"abbrevTitle":"CLKXJSY","coverImgSrc":"journal/img/cover/JMST.jpg","id":"11","issnPpub":"1005-0302 ","publisherId":"CLKXJSY","title":"材料科学技术（英文）"},"keywords":[{"id":"c69c0783-2154-4195-8319-e8beaade2cea","keyword":"Acicular nanocrystals","originalKeyword":"Acicular nanocrystals"},{"id":"4bdc8b39-4e21-4292-b69a-d258714b7a80","keyword":"null","originalKeyword":"null"},{"id":"eb9a3634-d3b8-4c9d-be9c-1df379950a02","keyword":"null","originalKeyword":"null"},{"id":"22deb6c5-13d2-4b65-9159-90285c40de41","keyword":"null","originalKeyword":"null"}],"language":"en","publisherId":"1005-0302_2003_6_13","title":"Influence of <span style=\"color:red\">Ethylene</span> Glycol on the Formation of Calcium Phosphate Nanocrystals","volume":"19","year":"2003"},{"abstractinfo":"Cobalt hydroxycarbonate nanorods are prepared by precipitation of cobalt acetate with sodium carbonate in <span style=\"color:red\">ethylene</span> glycol. Structural and chemical analyses of the intermediate phases during the precipitation and aging process revealed that amorphous cobalt hydroxide acetate is formed at the initial stage where <span style=\"color:red\">ethylene</span> glycol acts as a simple solvent and a coordinating agent. With the slow addition of sodium carbonate, carbonate anions are gradually intercalated into the interlayers by replacing the acetate and hydroxyl anions. This anion-exchange process induces a dissolution-recrystallization process in which <span style=\"color:red\">ethylene</span> glycol serves as a rate-controlling agent, producing rod-like cobalt hydroxide carbonate. During the aging process, <span style=\"color:red\">ethylene</span> glycol gradually incorporates into the structure to replace the carbonate and acetate anions; the interlayer structure is collapsed, and the nanorod-shape turns into thin crimped sheets. Co(3)O(4) nanorods with a diameter of about 10 nm and a length of 200-300 nm are then obtained by calcination of the nanorod-shaped cobalt hydroxycarbonate precursor. This spontaneous shape transformation from the precursor to the oxide is attributed to the unique thermal stability of the cobalt hydroxycarbonate nanorods with the presence of <span style=\"color:red\">ethylene</span> glycol and acetate anions in the interlayers. The Co(3)O(4) nanorods show a much superior catalytic activity for CO oxidation to the conventional spherical Co(3)O(4) nanoparticles, clearly demonstrating the morphology-dependent nanocatalysis.","authors":[],"categoryName":"|","doi":"","fpage":"2116","id":"45717a9e-0c97-447d-94b5-922baa120d5b","issue":"5","journal":{"abbrevTitle":"JOPCC","id":"ac67555d-0402-4e5c-8a4c-93f73d479ea5","issnPpub":"1932-7447","publisherId":"JOPCC","title":"Journal of Physical Chemistry C"},"keywords":[{"id":"f6ff1a5b-f463-4d45-90bc-9e728056ea67","keyword":"layered double hydroxides;hydrotalcite-like compounds;anion-exchange;reactions;co3o4 nanorods;solvothermal decomposition;selective;synthesis;thermal-conversion;crystal-structure;brucite-like;carbonate","originalKeyword":"layered double hydroxides;hydrotalcite-like compounds;anion-exchange;reactions;co3o4 nanorods;solvothermal decomposition;selective;synthesis;thermal-conversion;crystal-structure;brucite-like;carbonate"}],"language":"en","publisherId":"1932-7447_2010_5_1","title":"Synthesis of Nanorod-Shaped Cobalt Hydroxycarbonate and Oxide with the Mediation of <span style=\"color:red\">Ethylene</span> Glycol","volume":"114","year":"2010"},{"abstractinfo":"It is showed after the <span style=\"color:red\">furnace</span> tubes serviced for 8-10 years that the density of damage in the HAZ (heat affected zone) of the weld has higher than in parent metals, though the depth of damage is not equal to. By the test of creep crack growth, it is also acquired that under same mechanic parameter C* (t), the rate of creep crack growth in the HAZ is more than twice as fast as in parent metals. Two mechanisms (overheating and thermal shock) of failure occurred in an accident are presented. The stress of thermal shock is analyzed, in which the change of the elasticity modulus with the radius ET=f(r) is considered. Based on it, the safety region of the thermal shock is obtained. Finally, two sets of curves for the safe life are suggested which can facilitate to estimate the remainina life of HK-40 or HP-Nb tubes by their creep rupture data.","authors":[{"authorName":"F.Z.Shen","id":"0e5be3e0-2510-4c80-b50b-ae91290b2fe5","originalAuthorName":"F.Z.Shen"}],"categoryName":"|","doi":"","fpage":"419","id":"e8fe6528-2cbb-47f7-917e-9e1002211b26","issue":"4","journal":{"abbrevTitle":"JSXBYWB","coverImgSrc":"journal/img/cover/amse.jpg","id":"49","issnPpub":"1006-7191","publisherId":"JSXBYWB","title":"金属学报(英文版)"},"keywords":[{"id":"d05c93b2-b6f9-4205-818b-adbfef607837","keyword":"failure","originalKeyword":"failure"},{"id":"7b4c6ec6-cc98-4857-8382-2b1fca6a3e10","keyword":"null","originalKeyword":"null"},{"id":"0b17b6a1-90f6-4aed-acb0-b733abebd0a6","keyword":"null","originalKeyword":"null"}],"language":"en","publisherId":"1006-7191_2004_4_44","title":"FAILURES AND THE LIFE OF <span style=\"color:red\">FURNACE</span> TUBES","volume":"17","year":"2004"},{"abstractinfo":"In this paper local compressive deforming  of a hexagonal <span style=\"color:red\">tube</span> of aluminum (JISA1050) is investigated by an electromagnetic forming. The hexagonal tubes are annealed for 1h. at 400℃, which have 55mm width with 1mm thickness, and 10mm corner edius. The deformed ation of the hexagonal <span style=\"color:red\">tube</span>, i.e., bead width, is 10, 15, 20mm, respectively. The magnetic flux density in the gap between the field shaper and the external surface of hexagonal <span style=\"color:red\">tube</span> is measured, and the result is that the magnetic flux density for a given voltage is almost identical along the gap) and decreases with increasing the gap. The profiles and the strain distribution of the hexagonal <span style=\"color:red\">tube</span> de- formed are affected by the change Of the charging voltage and the dimensions of a bead width. The greater compressive strum in the cireuwtrential direction is develOPed on plane part near corner,while tensile strain on the corner occurs. A metallic block is inserted inside the hexagonal <span style=\"color:red\">tube</span> so that uniform profile can be obtained. The simulation of the forming is performed by a finite-element method and compared with the experimental results.","authors":[{"authorName":"S.B. Zhang and H. Nejishi (Department of Mechanical Engineering and Intelligent Systems","id":"1a33dbf2-3ab5-42aa-b2aa-cbcbf5fdcafd","originalAuthorName":"S.B. Zhang and H. Nejishi (Department of Mechanical Engineering and Intelligent Systems"},{"authorName":" University of E feetro- Communications","id":"c1f416b2-7b2b-4ad6-80d4-105a72e86662","originalAuthorName":" University of E feetro- Communications"},{"authorName":" Chofugaoka 1-5-1","id":"8173836d-86c3-4b3c-a302-ca0d1b3efbfb","originalAuthorName":" Chofugaoka 1-5-1"},{"authorName":"Chofu-shi","id":"0275700e-09e4-4728-b1a3-16f275ae14fb","originalAuthorName":"Chofu-shi"},{"authorName":" Tokyo 182-8585","id":"d56bbae6-0638-439e-947e-ac2d492129c9","originalAuthorName":" Tokyo 182-8585"},{"authorName":" Japan)","id":"db19dde6-34f3-4841-b674-84091a520322","originalAuthorName":" Japan)"}],"categoryName":"|","doi":"","fpage":"328","id":"8aa4782d-90d9-410a-901a-6c9bca7f7600","issue":"1","journal":{"abbrevTitle":"JSXBYWB","coverImgSrc":"journal/img/cover/amse.jpg","id":"49","issnPpub":"1006-7191","publisherId":"JSXBYWB","title":"金属学报(英文版)"},"keywords":[{"id":"b63e6421-2863-4084-ad28-156fd4cc5c08","keyword":"electromagnetic forming","originalKeyword":"electromagnetic forming"},{"id":"8e3b7e0d-800b-4022-9a7f-7db4d04c6628","keyword":"null","originalKeyword":"null"},{"id":"b59cc978-1dd8-4e23-b453-5a3bbe7db761","keyword":"null","originalKeyword":"null"},{"id":"8c0ba1cf-49b7-4207-ae14-c91120ecdc85","keyword":"null","originalKeyword":"null"},{"id":"7478ca31-3a06-424d-a96e-83704c6c4948","keyword":"null","originalKeyword":"null"}],"language":"en","publisherId":"1006-7191_2000_1_4","title":"INSIDE BEADING OF A HEXAGONAL <span style=\"color:red\">TUBE</span> BY ELECTROMAGNETIC FORMING","volume":"13","year":"2000"},{"abstractinfo":"According to the theories for stretch reducing process and steel <span style=\"color:red\">tube</span> plastic deformation, the energy method was used to mesh the rolled deformation zone of the steel <span style=\"color:red\">tube</span> into the upper limit elements, and an admissible velocity field was constructed to deduce a series of formulas of the inner virtual power consumption of deformed bodies. The rolling force during the stretch reducing process could be obtained by optimizing the upper limit power, which could provide guidelines for a proper choice of the stretch reducing process and devices for steel <span style=\"color:red\">tube</span> companies, as well as new products and devices.","authors":[{"authorName":"ZHANG Fangping","id":"7226db41-7865-4d41-aa89-7f74fcac2eaa","originalAuthorName":"ZHANG Fangping"},{"authorName":"SUN Binyu","id":"471f938a-0fe6-4fda-9d81-944c4f40637f","originalAuthorName":"SUN Binyu"},{"authorName":"WANG Jianmei","id":"fd06a934-a032-43ad-bd91-9ad6e6015f1f","originalAuthorName":"WANG Jianmei"}],"categoryName":"|","doi":"","fpage":"39","id":"2657375f-8259-4989-b8da-b287ea94f00c","issue":"6","journal":{"abbrevTitle":"GTYJXBYWB","coverImgSrc":"journal/img/cover/GTYJXBEN.jpg","id":"1","issnPpub":"1006-706X","publisherId":"GTYJXBYWB","title":"钢铁研究学报(英文版)"},"keywords":[{"id":"77bd77fc-fb44-4f90-8d4c-dc3018770c95","keyword":"upper limit power;rolling force;velocity field","originalKeyword":"upper limit power;rolling force;velocity field"}],"language":"en","publisherId":"1006-706X_2008_6_6","title":"Energy Method in Stretch Reducing Process of Steel <span style=\"color:red\">Tube</span>","volume":"15","year":"2008"},{"abstractinfo":"Tubular products made of superalloys and titanium alloys usually work in high temperature environment and applied heavy loading. Hot extrusion is the best technology to form tubular billets with fine microstructures and good mechanical properties. Lubrication is one of the key techniques in hot extrusion, glass lubricants are most suitable for hot extrusion. Lubrication technique in hot extrusion is dealt with in this paper, the lubrication principle of hot <span style=\"color:red\">tube</span> extrusion is presented. Experiments of glass lubricated backward <span style=\"color:red\">tube</span> extrusion of titanium alloys and forward <span style=\"color:red\">tube</span> extrusion of superalloys are also discussed.","authors":[],"categoryName":"|","doi":"","fpage":"113","id":"d6f3fea1-6c35-403b-b495-dfff6183ae9e","issue":"1","journal":{"abbrevTitle":"CLKXJSY","coverImgSrc":"journal/img/cover/JMST.jpg","id":"11","issnPpub":"1005-0302 ","publisherId":"CLKXJSY","title":"材料科学技术（英文）"},"keywords":[],"language":"en","publisherId":"1005-0302_2001_1_1","title":"Lubrication in hot <span style=\"color:red\">tube</span> extrusion of superalloys and Ti alloys","volume":"17","year":"2001"}],"totalpage":53,"totalrecord":530}