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四、石油管的品种规格按照石油管的主要用途可分为:油管、套管、钻杆、方钻杆和钻键等五种。根据不同的结构型式,每种管材还可以分为不同的品种。例如,油管有加厚油管和不加厚(平式)油管;钻杆有内加厚钻杆、外加厚钻杆和对焊钻杆。对焊钻杆的加厚部分有内加厚、外加厚和内外加厚三种。按强度级别,石油管可分为高强度石油管和低强度(或普通强度)石油管。在 相似文献
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通过TC18不同锻造加热温度、不同锻造变形量的锻造试验,研究了TC18合金性能随锻造加热温度和变形量变化的规律,得出如下结论:为获得良好的拉伸性能和冲击韧性,TC18合金应采取近β锻造,锻造加热温度应控制在Tβ~(Tβ+30)℃范围内,同时锻造变形量应控制在55%~70%。 相似文献
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对TC2钛合金管材研制中的两辊温轧、多辊冷轧变形程度及直径壁厚变形匹配关系、温轧加热温度、中间及成品退火温度、化学成分等对管材加工成形质量、组织性能等的影响进行了研究。研究结果显示,该合金两辊温轧、多辊冷轧性能优良,在直径壁厚变形匹配合理的条件下,温轧和冷轧道次变形达40%和30%时,未产生轧制开裂等加工缺陷;温轧加热温度550℃—650℃时,Al,Mn含量控制在标准中上限,Fe,O含量适中;退火温度850℃—900℃时,轧制产品质量和各项性能指标可满足技术标准要求。 相似文献
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《宝钢技术》2010,(1)
专利号:ZL200410017996.3专利权人:宝山钢铁股份有限公司发明人:殷光虹于杰孙元宁施青朱世忠高强度石油钻杆,其成分为(质量百分比):wC0.20%~0.30%、wSi0.1%~0.5%、wMn0.7%~1.5%、wCr0.7%~1.5%、wMo0.1%~0.4%、其余为Fe和不可避免的杂质;其制造方法为,将上述成分钢管管端加厚处理,制成加厚钻杆的管体;然后对钢管整体回热,再对回热后的钢管冷却处理,放在一个旋转淬火台架上,在钢管旋转的同时,进行内表面轴流喷水,外表面层流喷水冷却;通过控制钢管加厚端和管体不同的外喷水量,或减少管体处的外喷水量,或加大钻杆加厚端处的外喷水量,使得不同壁厚的管体和加厚端具有相同的冷却速度,以保证管体和加厚端具有相同的淬火组织,经回火后得到相同的力学性能。高强度石油钻杆及其制造方法$宝山钢铁股份有限公司科技发展部 相似文献
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《Baosteel Technical Research》2010,(Z1):68
Drill pipe products are the most critical service requirement,the highest performance requirement and the highest quality reliability OCTG products.Through the continuous research on steelmaking,upset, heart treatment,straightening and friction welding,Baosteel improves the key technical parameters which affect the quality of drill pipe,such as material purity,Miu of internal upset transition area,toughness and straightness.Baosteel drill pipe products have met the demanding requirement of drilling operations.By BRP dephosphorization and LF desulfurization,the P,S content of Baosteel drill pipe is very low.The S content of S-135 drill pipe can be controlled in less than 10ppm.Baosteel designs a new closed-loop control system of upset end induction heating system.The system use temperature measurement inside the oven and closed-loop control.The temperature accuracy of the system can be guaranteed within the±15℃to get a stable upset quality.The upsetting process of the drill pipe is optimized by using patented technology and made the Miu from 100 mm to 140 mm.This make a substantial increase in fatigue life of the drill pipe.To improve the impact toughness of the drill pipe body,the drill pipe body material is changed from Cr-Ni-Mo system to Cr-Mo-V system and the heat treatment is changed from oil quenching to water quenching.To improve the impact toughness of the tool joint,the tool joint furnace is upgraded to improve heating capacity.To improve the impact toughness of the weld zone,a new fuzzy control system of weld zone heat treatment is developed.The temperature accuracy of the system can be guaranteed within the±5℃to get a stable heat treatment quality.A new drill pipe straightness automatic detection devices and self-learning method of straightening are developed to achieve automated straightening.A welding process with high speed,single-stage pressure and high forging force is applied to inertia friction welding.A welding process with low speed,three-stage pressure and low forging force is applied to continous friction welding. 相似文献
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用空心锭挤压管材时在镦粗过程中穿孔针受力研究 总被引:1,自引:0,他引:1
研究了用空心铸锭挤压管材时在镦粗过程中穿孔针的受力及变形情况。结果表明,此时穿孔针主要承受弯曲应力作用,并产生弯曲变形,从而造成挤出管材前端产生偏心,并对穿孔针的寿命带来不利影响。提出了穿孔针所承受的最大弯曲应力的计算方法。 相似文献
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通过对出口异型管试制工艺的研究和对影响产品质量各方面问题的分析,提出了模具设计和拉伸矫直量的控制是影响型管质量的决定性因数,并成功地开发了这一产品。 相似文献
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圆管二次辊弯成形过程中的大变形有限元法模拟 总被引:1,自引:0,他引:1
应用弹塑性三维大变形有限元理论,同时考虑材料和几何双重非线性,基于Prandtl-Reuss流动规律和Miss屈服准则,并采用Updated-Largrangian增量叠加法分析了不同压下量成形过程中金属由非稳态到稳态的流动规律,然后通过有限元程序实现了计算机模拟。模拟结果为CAD(计算机辅助设计)及CAM(计算机辅助制造提供了重要理论依据,同时还可以指导实际生产过程,对提高产品的质量和经济效益有 相似文献
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典型的空心锻件-电渣合金钢辊套锭重≥2 t,内孔直径560~880 mm,外径670~1200 mm,长1300~1780 mm。在保证质量的基础上,采用改进的工艺-直接锻粗法后,与传统工艺相比,可减少2道工序和一次中间加热,锻件成材率提高5%~15%,显著降低生产成本。 相似文献
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《钢铁研究学报(英文版)》2016,(6):531-538
Nonmetallic inclusions mixed into large forged metal objects destroy the continuity in the metal and affect the quality of the forged product.Research on how inclusions affect the plastic deformation of a matrix shows the significance of the formation mechanism of inclusion defects.For upset forging,the nonlinear finite element model was shown to be appropriate for the ingot hot-forging process by comparing the results with experiments involving plastic and hard inclusions inserted into the forged piece.The high-temperature stress-strain curves of MnS plastic inclusions were obtained experimentally.The results show how,during upsetting,the morphology of MnS plastic inclusions varies from spherical to ellipsoidal,until finally becoming flat in shape.The larger the inclusion is,the larger the degree of deformation of the inclusion is,and large inclusions enhance the risk of the final product failing to pass inspection for inclusion flaws.Strain significantly concentrates in the matrix near a hard inclusion.When the hard inclusion reaches a certain size,conical fractures form on both sides of the inclusion.To pass inclusion-flaw inspection and close hole defects to the extent possible,the flat-anvil upsetting is recommended.Finally,the inclusiondeformation state obtained by finite element simulation is verified experimentally. 相似文献
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首钢落料线是由北京首钢股份有限公司投资建设,于2011年5月底建成投产,主要为汽车企业提供高水平的落料压力成型服务。生产线采用德国舒勒整体进口设备及自动化控制系统,压机采用伺服直驱技术,年加工能力为10万t。首钢落料生产线在生产中产品经常出现硌伤、划伤、油污、锈蚀、辊印、毛刺、波浪、弯曲、边缘损伤和尺寸超差等影响汽车企业冲压工序的质量缺陷。针对产品常见的质量缺陷进行分析,查找各种质量缺陷的成因,提出了相应控制措施,消除了各种质量缺陷,提高了产品成材率和市场竞争力。 相似文献