共查询到19条相似文献,搜索用时 93 毫秒
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佘交辉 《冶金标准化与质量》2004,42(3):33-34
现行的铁水取样方法有些方面已不适合大中型钢铁企业的生产与分析要求的实际 ,我们通过试验 ,确信可以找到一种变通的方法 ,在适当的时机 ,通过一次取样 ,一次分析 ,即可得到该炉铁水的一个水平估计 ,与标准取样法相比 ,有较好的符合性 ,同时又适于仪器分析 ,较好满足生产要求。 相似文献
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本文介绍了在二号竖炉球团矿取样器上加进控制电路,使其由点动取样变为点动/自动两便的取样方式,方便实用,适应了生产发展的要求。 相似文献
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《有色冶金设计与研究》2017,(6)
江西某铜矿需对三期开采境界内矿石进行选矿试验。采样布置在二期末至三期前8年露天开采境界内,要代表三期前8年生产矿石。依据该矿具体地质情况,根据选矿试验对样品的要求和取样原则,进行了取样,并根据具体遇到的情况进行了取样调整,对取样、配样结果进行了分析,提出了此次取样设计中存在的问题。 相似文献
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一、申请使用会标的程序1.API 会标是美国石油学会的注册商标。凡标有 API 会标的产品,标明该产品的制造者担保它制造和销售的产品符合API 标准。申请使用 API 会标的制造厂必须向 API 学会提交一个申请书和申造者资格报告书。2.当 API 学会认为申请者的资料能满足学会要求,其制造的产品也能符合 相似文献
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介绍了X60管线钢热轧卷板首次试生产的基本情况,试制热轧卷板的化学成分、力学性能、金相组织等均达到API技术标准要求,并对化学成分、工艺以及生产中存在的问题进行了讨论。 相似文献
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在鞍钢现有的生产条件下,用平均碳含量为0.45%的模铸镇静钢生产J-55石油管是可行的。只要严格控制钢的熔炼成分,控制冶炼和轧制操作工艺过程,就可以保证石油管的机械性能符合API Std.5A标准要求。 相似文献
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鞍钢无缝钢管厂测长系统设计 总被引:1,自引:0,他引:1
对鞍钢无缝钢管厂热轧二车间生产线安装的测长系统作以详细介绍。包括该系统的参数、设计要求、设计思想,具体列出采样驱动程序,清单,实践证明,该测长系统可完全满足生产工艺过程的要求,达到API国际标准。 相似文献
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Ivani de S. Bott Luis F. G. De Souza José C. G. Teixeira Paulo R. Rios 《Metallurgical and Materials Transactions A》2005,36(2):443-454
The production of American Petroleum Institute (API) class steels using the traditional controlled rolling route rather than
the process involving accelerated cooling necessitates a careful adjustment of steel composition associated with the optimization
of the rolling schedule for the deformation and phase transformation characteristics of these modified alloys. The current
work presents a study of two, NbCr and NbCrMo, steel systems. The microstructure obtained is correlated not only with the
resulting mechanical properties, but also with the weldability and resistance to damage in the aggressive environments to
which the materials are exposed. The evaluation of the steels was undertaken at two stages along the production route, sampling
the material as plate and as tubular product, according to the API 5L 2000 standard. Tensile testing, Charpy-V impact testing,
and hardness measurements were used to determine the mechanical properties, and microstructural characterization was performed
by optical and scanning electron microscopy. The results showed that it was possible to obtain good impact properties, for
both steels, in plate and tube formats. The Charpy-V impact energy, measured at −20 °C from 100 to 250 J corresponds to a
toughness level above that required by the API 5L 2000 standard, which specifies 68 to 101 J at 0 °C. The yield strength (YS)
to ultimate tensile strength (UTS) ratio was determined to be 0.8, the API standard establishing a maximum limit of 0.93.
Both of the alloys investigated exhibited a bainitic microstructure and were successfully processed to fabricate tubular products
by the “UOE” (bending in “U”, closing in “O,” and expanding “E”) route. with regard to weldability, the two experimental steels
exhibited a heat-affected zone (HAZ) for which toughness levels (using the temperature associated with a 100 J impact energy
as a base for comparison) were higher than those for both the base metal (BM) and the weld metal (WM) itself. In order to
perform the evaluation of the behavior of the steels in an aggressive environment, more specifically their resistance to the
deleterious effects of H2S, slow strain rate tests (SSRTs) were carried out, immersing the samples in a sodium thiosulfate solution during the tests.
Though no secondary cracking was observed in the test samples, the ductility levels measured were lower than those for the
same materials tested in air. Constant load tests were also conducted according to the standard NACE conditions. Despite the
more aggressive nature of the test solution in these cases, no samples of either steel suffered failure. 相似文献
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在实际生产应用中,火花放电原子发射光谱法广泛应用于带极堆焊熔敷金属的日常检验。因生产工艺和组织结构等因素的差别,使用标样作为类标样品时分析结果存在误差。实验针对带极堆焊熔敷金属,开展了火花放电原子发射光谱法应用于碳、硅、锰、硫、磷、铬、镍7种元素含量检测的应用研究,通过对光源参数中冲洗时间、预燃时间、积分时间进行优化,确定了冲洗时间为5s、预燃时间为6s、积分时间为7s的实验条件。探讨了使用标准样品和自制控样两种类型标准化方法对分析结果的影响。试验发现,采用不锈钢标样ZBGS003作为类型标准化样品测定带极堆焊熔敷金属时,碳、锰、铬、镍尤其是铬的分析值与化学湿法相差较大。而采用自制的带极堆焊熔敷金属建立类型标准化曲线后,测定结果与化学湿法分析结果基本一致。 相似文献
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采用2种J55级钢带(A钢带:高含量碳锰;B钢带:低含量碳锰)对高频焊接(HFW)油管进行了试制,并通过光学显微镜、力学分析等方法研究了钢带的成分和性能对最终管体性能的影响。研究结果表明,钢带中高含量C和 Mn元素使 A钢带屈服强度升高,制管过程中由于加工硬化的影响,进一步增加了钢管的力学性能,因此由A钢带试制的 HFW油管(A钢管)屈服强度超标,同时高含量C、Mn元素导致焊缝质量降低。采用适当降低C、Mn等强化元素的钢带试制的 HFW油管质量良好,性能完全符合 API SPEC 5CT规范要求。 相似文献
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A. G. Ponomareva E. V. Gordeev I. Yu. Evtushenko D. V. Samsonov 《Steel in Translation》2013,43(12):815-817
In eliminating contamination at the surface of cold-rolled strip, it is important to ensure the required characteristics of the rolling emulsion. Accordingly, the emulsion parameters determining the purity of the metal surface beyond the 1700 five-cell cold-rolling mill are investigated in casting and rolling shop 2 at AO ArcelorMittal Temirtau. 相似文献
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利用有限元软件对特殊断面宽钢带的轧制过程建立了仿真模型,并利用LS/Dyna软件对轧制过程进行了仿真模拟,得出了特殊断面宽钢带的变形情况。结果表明,在满足合理配辊制度的条件下,轧件的板形良好,应力分布均匀;合理的轧制制度能够使得金属流动均匀,轧制力分布得到改善。 相似文献