宝钢技术2012年第一期.doc

宝钢技术2012年第一期宝钢经济型油套管接头产品开发及应用王琍,罗蒙(宝山钢铁股份有限公司研究院,上海201900)摘要：油套管接头的性能是油套管管柱重要质量指标之一,其选用条件是根据油气田工况条件,采用API扣型和特殊螺纹扣型。对于低压低产气井,选用API扣型不能保证气密封性能,选用特殊螺纹扣型价格贵、成本高，因此，没有合适的扣型选用。宝钢根据油田低压低产气井工况条件,设计开发了经济型油套管产品,产品通过全尺寸实物性能试验,其上扣完整性、密封完整性、结构完整性达到了产品设计要求,并在油田完成了下井试验,产品满足了油田实际工况的要求,实现了实用性和经济性的统一。关键词：油套管; 接头; 气井中图分类号：TP391文献标志码：B文章编号：1008-0716(2012)01-0001-05doi:10.3969/j.issn.1008-0716.2012.01.001Development and application of Baosteels economical oiltubing and casing connectionsWANG Li and LUO Meng(Research Institute, Baoshan Iron & Steel Co., Ltd., Shanghai 201900, China)Abstract：Performance of oil tubing and casing connections is one of the most important quality indicators for the column of oil tubing and casing. Based on the well condition, API series connections and special thread connections are preferred in general. However, for those gas wells with low yield and low pressure, there is almost no proper connection that can be used. The API series connections are poor in gas sealing, and the special thread ones are too expensive. Based on the working conditions of those gas wells, Baosteel has designed and developed an economical connection, which has been qualified in a full scale test in laboratory. Its integrity in make up, sealing and structure has reached the design requirements. And the product has gone through all the application tests in the oil field. As it can meet the needs of the oil fields, it has realized the unity of practicality and economic efficiency.Key words：tubing and casing; connection; gas wellGH4169合金VIM+PESR+VAR三联冶炼工艺及其冶金质量陈国胜1,刘丰军2,王庆增2,王资兴1,魏志刚1(宝山钢铁股份有限公司 1.研究院，上海201900; 2.特钢事业部,上海200940)摘要：介绍了GH4169合金 508锭的VIM+PESR+VAR三联工艺及其冶金效果和实物质量。结果表明,较之VIM+VAR双联工艺浇铸的电极,三联工艺PESR制作的电极由于没有缩孔、组织致密、纯洁度高,VAR冶炼的工艺稳定性显著提高,且VAR过程中掉块的几率大幅度降低,因而,宏观缺陷的出现率大幅度下降。同时由于PESR良好的脱硫、去氧作用,三联工艺成品锭硫、氧含量显著下降,热塑性也明显改善。此外,纯洁度的提高,势必导致氮化物、碳化物形成核心减少,加之工艺参数稳定性的提高,三联工艺成品材中碳化物分布的均匀性也有所改善。关键词：GH4169合金; VIM; PESR; VAR中图分类号：TF14文献标志码：B文章编号：1008-0716(2012)01-0006-05doi:10.3969/j.issn.1008-0716.2012.01.002Metallurgical quality of GH4169 alloy by theVIM+PESR+VAR triad smelting processCHEN Guosheng1, LIU Fengjun2, WANG Qingzeng2, WANG Zixing1 and WEI Zhigang1(1.Research Institute, Baoshan Iron & Steel Co., Ltd., Shanghai 201900, China;2.Special Steel Business Unit, Baoshan Iron & Steel Co., Ltd., Shanghai 200940, China)Abstract：The metallurgical effect and product quality of GH4169 alloy ( 508 mm ingot) by the VIM+PESR+VAR triad smelting process were introduced. The results show that compared with the casting electrode by the VIM+VAR duplex smelting process, the PESR electrode by the triad smelting process is compact in structure and very pure and has no shrinkage, therefore, the VAR process stability has been significantly improved. Moreover, the probability of the falling particles has been greatly reduced, which leads to great reduction in the occurrence probability of macroscopic defects. Meanwhile, as the PESR functions well in desulphurization and deoxygenation, the contents of sulphur and oxygen in finished ingots by the triad smelting process have been notably lowered and the ingots thermoplasticity has been obviously improved. Furthermore, as the purity has been increased, it inevitably leads to the reduction of the nucleation of nitrides and carbides. Together with the improved stability of the process parameters, the uniformity of the carbide distribution has been improved in finished products by the triad smelting process.Key words：GH4169 alloy; VIM; PESR; VAR镦粗工艺对GH4169合金 508锭铸态组织的影响郁蕾芸1,卢俊2(宝山钢铁股份有限公司 1.特钢事业部,上海200940; 2.研究院,上海201900)摘要：针对铸态组织粗大的特点,在GH4169合金 508 VAR锭R/2处切取大尺寸热顶锻试样进行镦粗试验,以考察合金锭的抗镦粗能力,以及变形温度、变形量对铸态组织动态再结晶的影响。结果表明,1 060和1 120,10%60%变形量时,均未发现裂纹萌生和扩展的迹象。随着变形量增大,原始组织中的显微裂纹和显微疏松明显减少或缩小;同一变形温度时,变形量增加,动态再结晶的比例迅速提高;相同变形量时,较高的变形温度能够有效地促进动态再结晶,降低动态再结晶的临界变形量。关键词：GH4169合金; 镦粗; 铸态组织; 再结晶中图分类号：TG132.3+2文献标志码：B文章编号：1008-0716(2012)01-0011-05doi:10.3969/j.issn.1008-0716.2012.01.003Effect of the upsetting process on the as cast microstructureof 508 mm superalloy GH4169 ingotYU Leiyun1 and LU Jun2(1.Special Steel Business Unit, Baoshan Iron & Steel Co., Ltd., Shanghai 200940, China;2.Research Institute, Baoshan Iron & Steel Co., Ltd., Shanghai 201900, China)Abstract：In order to study the characteristic of the coarse as cast microstructure, a large piece of sample of hot upset forging was cut at the R/2 position of GH4169 VAR ingot with a diameter of 508 mm for the upsetting tests to see the ingots anti upsetting ability and the effects of the deformation temperature and deformation amount on dynamic recrystallization (DR) of the as cast microstructure. The results show that when the temperature was at 1 060 or 1 120 and the deformation amount ranged from 10% to 60%, no signs of crack initiation or crack propagation were found. With the increase in deformation amount, the microcracking and microporosity would decrease or narrow in the initial cast microstructurere. When at the same deforming temperature, the dynamic recrystallization ratio would sharply increase with the increase in the deformation amount. When deformation kept unchanged, the higher deforming temperature could promote the DR and lower the critical deformation of the DR.Key words：GH4169 alloy; upsetting; as cast microstructure; recrystallizaiton影响TC18钛合金铸锭成分均匀性的因素杨庆,秦桂红,陈杰,肖宏伟(宝山钢铁股份有限公司特钢事业部,上海200940)摘要:TC18钛合金铸锭是通过真空自耗冶炼方法获得的。由于该合金需要添加的元素较多,加上还有Fe和Cr易偏析元素,因此成分均匀性很难控制。主要从原材料的验收控制、布料及压制电极方法改进以及冶炼工艺的调整、设备精度的确保等方面来解决TC18钛合金的成分偏析问题。通过本次工艺改进,电极制备的均匀性得到了很好的控制,熔炼熔池深度也得到了控制,最终确保了铸锭的成分均匀性,取得了很好的效果。关键词:布料; 冶炼工艺; 偏析中图分类号:TF771.1文献标志码:B文章编号:1008-0716(2012)01-0016-04doi:10.3969/j.issn.1008-0716.2012.01.004Factors affecting TC18 titanium alloy ingots composition uniformityYANG Qing, QIN Guihong, CHEN Jie and XIAO Hongwei(Special Steel Business Unit, Baoshan Iron & Steel Co., Ltd., Shanghai 200940, China)Abstract:TC18 titanium alloy is obtained by melting plus vacuum consumable ingot. It is difficult to control the alloy ingots composition uniformity because there are lots of adding elements and some easy segregation elements, like Fe and Cr in it. TC18 titanium alloys segregation problem can be solved by taking the following measures, such as controlling the quality of raw materials, improving burden distribution and way of pressing electrodes, adjusting the smelting process and ensuring the precision of equipment. With the improvement of the process, uniformity of the electrodes and the depth of the melting pool were well controlled, which finally ensured the alloy ingots composition uniformity achieved good effect.Key words:burden distribution; smelting process; segregationTC6钛合金的热塑性变形行为研究秦桂红(宝山钢铁股份有限公司特钢事业部,上海200940)摘要：采用热模拟试验机对TC6钛合金轧制态试样进行了不同温度和不同应变速率的应力应变试验,研究TC6钛合金的高温变形行为。试验结果表明,TC6钛合金在相同的温度下,应变速率越小,热塑性越好,越容易变形;应变速率对TC6钛合金热塑性的影响还与温度有很大的关系,温度越低，热塑性受应变速率的影响越明显。800900时,TC6钛合金热塑性受温度影响较大,变形温度越低,热塑性越差;900以上时,几乎不受变形温度和应变速率的影响。TC6钛合金在920950,应变速率1.0 s-1时具有良好的热塑性和很好的热加工性能。关键词：TC6钛合金; 热塑性; 变形行为中图分类号：TG146.2+3文献标志码：B文章编号：1008-0716(2012)01-0020-03doi:10.3969/j.issn.1008-0716.2012.01.005Research on TC6 titanium alloys thermoplastic deformation behaviorQIN Guihong(Special Steel Business Unit, Baoshan Iron & Steel Co., Ltd., Shanghai 200940, China)Abstract：The test on TC6 titanium alloys stress strain property was conducted at different temperatures and different strain rates with a thermo simulation machine. The results show that at the same temperature, the lower the strain rate is, the better the alloys thermoplasticity is and the easier it deforms. The effect of the strain rate on the alloys thermoplasticity has more to do with temperature: the lower the temperature is, the more obviously the thermoplasticity is affected by the strain rate. When it is between 800 and 900, the TC6 titanium alloys thermoplasticity is affected by temperature greatly: the lower the temperature is, the poorer the thermoplasticity will be. When it is over 900, the alloys thermoplasticity almost has nothing to do with the deformation temperature and strain rate. When it is 920-950 and the strain rate is 1.0 s-1, the TC6 titanium alloy has good thermoplasticity and excellent machinability.Key words：TC6 titanium alloy; thermoplasticity; deformation behavior高导磁纳米晶合金的磁特性研究华瑛(宝山钢铁股份有限公司特钢事业部,上海200940)摘要：选取FeCuNbCrVSiB纳米晶样品,在特定条件下,测试不同温度时的a-T曲线、Pcm-T曲线。试验结果表明,纳米晶合金的双相结构使其在不同的温度条件下受到不同影响，产生变化差异,所以在不同温度条件下的磁导率和损耗特性不同。通过对高导磁FeCuNbCrVSiB纳米晶合金磁性能参数的测量、分析,从纳米晶的微观组织结构和宏观磁特性紧密相关的角度,探讨了新型FeCuNbCrVSiB纳米晶合金的结构与磁性之间的依赖关系,对新型纳米晶合金具有独特的结构和优异的软磁性能的本质进行了讨论,并对如何提高纳米晶合金的磁性能作了探讨。关键词：纳米晶合金; 磁导率; 铁损中图分类号：TM274文献标志码：B文章编号：1008-0716(2012)01-0023-04doi:10.3969/j.issn.1008-0716.2012.01.006Study on magnetic properties of high permeability nanocrystalline alloysHUA Ying(Special Steel Business Unit, Baoshan Iron & Steel Co., Ltd., Shanghai 200940, China)Abstract：Some FeCuNbCrVSiB nanocrystalline alloy samples were taken. The a-T and Pcm-T curves were tested at different temperatures. The results show that the duplex structure of the nanocrystalline alloy would be affected at different temperatures and would generate some difference in variety. So at different temperatures the alloys permeability and core loss characteristics are different. Through measuring and analyzing its magnetic property parameters, the relationship between the new high permeability FeCuNbCrVSiB nanocrystalline alloys structure and magnetic properties was explored from the view of the microstructure and closely related macroscopic magnetic properties of the nanocrystalline alloy. The unique structure and excellent magnetic properties of the new FeCuNbCrVSiB nanocrystalline alloy were discussed, together with the problems of how to improve nanocrystalline alloys magnetic properties.Key words：nanocrystalline alloy; permeability; core loss热处理制度对新型高强度不锈钢组织与性能的影响王敏,姚长贵,贾利星(宝山钢铁股份有限公司特钢事业部,上海200940)摘要：新型高强度不锈钢属于马氏体时效硬化不锈钢,该钢采用二次硬化机理设计成分,添加多种强碳化物形成元素,添加高量Co细化M2X相,在合适的温度回火下,不仅具有高强度、高硬度,而且还有高的塑性与韧性,在航天航空领域有着广泛的应用前景。主要研究了热处理制度对新型高强度不锈钢组织与性能的影响,摸索出适合的热处理制度,保证钢获得强度与韧性的良好配合,为今后进一步研究和使用该钢提供试验依据。关键词：超高强度钢; 热处理制度; 力学性能中图分类号：TG142.1文献标志码：B文章编号：1008-0716(2012)01-0027-04doi:10.3969/j.issn.1008-0716.2012.01.007Effect of the heat treatment on microstructure and mechanicalproperties of the new high strength stainless steelWANG Min, YAO Changgui and JIA Lixing(Special Steel Business Unit, Baoshan Iron & Steel Co., Ltd., Shanghai 200940, China)Abstract：The new high strength stainless steel belongs to martensite age hardening stainless steel. As the secondary hardening mechanism was used to design its composition and a variety of strong carbide elements and a lot of Co refining M2X phase were added to it, the steel had high strength, high hardness, high plasticity and high toughness when it was tempered at an appropriate temperature. It also has found a wide application prospect in the aerospace area. This paper aims to study the effect of the heat treatment regime on the microstructure and properties of the new high strength stainless steel and tries to find out an appropriate heat treatment regime to make the steel possess a good match between its strength and toughness. It will provide experimental foundations for the further research and application of the steel.Key words：high strength steel; heat treatment regime; mechanical property分析与研究磁场搅拌方式对Sn-11%Sb合金凝固组织与偏析的影响侯晓光1,2,刘俊江1(1.宝山钢铁股份有限公司,上海200431; 2.东北大学,辽宁沈阳110004)摘要：中心偏析是钢连铸坯的常见缺陷,严重影响了产品的质量。电磁搅拌是对金属凝固过程进行控制、改善连铸坯质量的有效手段,旋转磁场电磁搅拌在钢的连铸过程中已得到广泛的应用,但螺旋磁场电磁搅拌的研究鲜见报道。以低熔点合金模拟钢的凝固过程,对采用不同电磁搅拌方式改善中心偏析缺陷的效果进行了模拟对比试验。研究了螺旋磁场电磁搅拌和旋转磁场电磁搅拌对Sn-11%Sb二元合金凝固组织的影响,并与常规条件下的凝固组织进行对比。试验结果表明，在相同电磁搅拌参数下,螺旋磁场电磁搅拌比旋转磁场电磁搅拌更能减小铸锭上下部成分之间的差异,细化晶粒,更好地促进铸锭成分均匀化效果。关键词：螺旋磁场; 旋转磁场; 晶粒细化; SnSb合金； 偏析中图分类号：TG146.1+4文献标志码：B文章编号：1008-0716(2012)01-0031-05doi:10.3969/j.issn.1008-0716.2012.01.008Effect of electromagnetic stirring methods on the solidificationstructure and segregation of Sn-11%Sb binary alloyHOU Xiaoguang1,2 and LIU Junjiang1(1.Baoshan Iron & Steel Co., Ltd., Shanghai 200431, China;2.Northeastern University, Shenyang 110004, Liaoning, China)Abstract：Center segregation is a kind of common defect in steel billets, which seriously affect the product quality. Electromagnetic stirring, which is one of the effective methods for controlling the metal solidification process, has been widely used in the continuous casting process. However, the research on spiral magnetic stirring was seldom reported. In this paper, effects of electromagnetic stirring methods on overcoming these defects are studied by simulating the solidification process of continuous casting steel with low melting alloys. Effects of different magnetic fields of electromagnetic stirring on solidification of Sn-11%Sb binary alloy have been studied and compared with this alloy in conventional conditions. The results show that, compared with the rotating magnetic field of electromagnetic stirring, the spiral magnetic field of electromagnetic stirring is more effective in decreasing the component difference between the upper and lower parts of the ingot, and it is more effective in refining grains and composition homogenization with the same electromagnetic stirring parameters.Key words：spiral magnetic field; rotating magnetic field; grain refinement; Sn-Sb alloy; segregation高强韧性海洋平台用E550钢板生产工艺研究胡聆,王鹏建(宝山钢铁股份有限公司制造管理部,上海201900)摘要：介绍了E550钢板的主要生产工艺和技术难点,通过理论分析设计了E550的成分体系,采用Thermal Calc和经验公式,获得了其热力学相图和相变点温度等热力学数据。根据E550的热力学特性,设计了两阶段轧制工艺,精轧的终轧温度控制在再结晶温度附近,利用奥氏体再结晶充分细化晶粒。淬火奥氏体化温度选择为920,回火温度设计为630,利用碳化物的析出强化效果和缺陷密度变化的位错强化获得良好的强韧性匹配。50 mm厚钢板的淬火态1/4厚度处的微观组织为马氏体,中心的组织为马氏体和少量贝氏体的混合物。回火热处理后,马氏体板条界面减少,碳化物在马氏体板条界面析出,钢板1/4到中心的组织均匀化。30和50 mm厚E550钢板的力学性能达到了船级社标准要求,并有较大的富裕量。热输入能量为15和50 kJ/cm焊接后,钢板具有良好的强度性能,熔合线和热影响区的冲击功较高。关键词：E550海洋平台钢; 成分设计; 控制轧制; 淬火+回火中图分类号：TG335.11文献标志码：B文章编号：1008-0716(2012)01-0036-07doi:10.3969/j.issn.1008-0716.2012.01.009Research on production process of high strength andtoughness E550 steel plate for offshore platformsHU Ling and WANG Pengjian(Products & Technique Management Department,Baoshan Iron & Steel Co., Ltd., Shanghai 201900, China)Abstract：The main processes and technical difficulties in production of the E550 plate were introduced. The E550 composition system was designed through theoretical analysis. Some thermodynamics data, such as the thermodynamic phase diagram and the temperature at the phase transformation point were worked out by the Thermal Calc and experiential formula. Based on the E550s thermodynamic properties, a two stage rolling process was designed. In order to fully refine grains by austenite recrystallization, the final finishing rolling temperature was controlled to be close to the recrystallization temperature. The austenitizing and quenching temperature was selected to be 920 and the tempering temperature to be 630. A good match of strength and toughness has been gained through making use of the carbide precipitation and the defect density of dislocation. The microstructure is martensite at 1/4 of the thickness and martensite mixed with a small amount of bainite at the center of the 50 mm quenched steel plate. After tempering, the martensite lath interface was reduced, the carbide precipitated at the martensite lath interface, and the structure of the plate was homogenized in the area from the place at 1/4 of the thickness to the center. The mechanical properties of the E550 steel plates (30 and 50 mm thick) reached the classification society standards and had a certain amount of surplus capacity. Welded with 15 or 50 kJ/cm heat input, the steel has higher strength and higher impact energy in weld lines and the heat affected zone.Key words：E550 steel plate for offshore platform; composition design; controlled rolling; quenching and tempering螺纹紧密距量规磨削牙面缺陷分析及对策元麟1,2,王琍2,钱华1,2(1.上海交通大学,上海200030; 2.宝山钢铁股份有限公司,上海201900)摘要：螺纹紧密距量规在磨削过程中,牙面缺陷偶有发生,如烧伤、裂纹、波纹等,缺陷的存在不仅影响量规的尺寸精度、稳定性,更影响耐磨性,直接导致螺纹紧密距量规寿命缩短。通过分析牙面缺陷形成机理,提出了从工件原材料、热处理工艺、磨削参数等方面采取预防措施,对消除螺纹紧密距量规磨削缺陷,提高螺纹紧密距量规寿命有一定的指导意义。关键词：螺纹量规; 紧密距; 烧伤; 微观裂纹; 波纹中图分类号：TG85文献标志码：B文章编号：1008-0716(2012)01-0043-05doi:10.3969/j.issn.1008-0716.2012.01.010Analysis and countermeasures of grindingtooth face flaw on thread standoff gaugeYUAN Lin1,2, WANG Li2 and QIAN Hua1,2(1.Shanghai Jiao Tong University, Shanghai 200030, China;2.Baoshan Iron & Steel Co., Ltd., Shanghai 201900, China)Abstract：In the grinding process of a thread standoff gauge, one or two tooth face flaws may appear now and then, such as burn, cracks, ripple, etc. The presence of these flaws will not only lessen the gauges measurement precision and stability but reduce its wearability and life span directly as well. This paper analysed the formation mechanism of flaws and advanced some preventive countermeasures in terms of raw materials, heat treatment technics and grinding parameters. It is instructive to eliminate the thread standoff gauges flaws and enhance its life span gauge.Key words：thread gauge; standoff; burn; microcrack; ripple低碳钢中形变诱导铁素体相变过程中的应力应变曲线研究赵河山(宝山钢铁股份有限公司硅钢部,上海200941)摘要：利用热模拟机Gleeble-3500在温度Ae3Ar3之间对低碳钢进行了形变诱导铁素体相变的试验研究,发现常见的形变诱导铁素体相变过程中的应力应变曲线可归纳为三种情况:“双峰”、“单峰”以及“过渡类型”。曲线上所表现出来的峰值是由形变诱导相变在晶界或者晶内发生而导致的软化效应所引起的,是加工硬化和相变软化的平衡点。对应变时间曲线和应力时间曲线的分析表明,形变对诱导相变过程中在晶内开始大量发生相变的时刻具有明显的推迟作用,形变诱导相变在形变接近结束之时才开始大量发生,导致大部分的相变过程发生在应变结束之后。研究发现,形变诱导铁素体相变具有亚动态相变的特征，是一个动态形核的亚动态相变过程。关键词：低碳钢; 形变诱导铁素体; 应力应变曲线; 亚动态相变中图分类号：TG111文献标志码：B文章编号：1008-0716(2012)01-0048-06doi:10.3969/j.issn.1008-0716.2012.01.011Investigation into the stress strain curve of deformation inducedferrite transformation in low carbon steelZHAO Heshan(Silicon Steel Department, Baoshan Iron & Steel Co., Ltd., Shanghai 200941, China)Abstract：A series of tests of the deformation induced ferrite transformation(DIFT)in low carbon steel were carried out by using