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冶金因素对低合金钢焊接接头耐蚀性的影响 总被引:1,自引:0,他引:1
选择四种低合金钢并采用相应配套焊接材料,制备了焊条电弧焊焊接接头试样,通过室内腐蚀挂片试验和电化学测试,研究了焊接接头的不同区域的腐蚀行为,结合化学成分、夹杂物和微观组织分析,探讨相关冶金因素对接头腐蚀行为的影响.结果表明,对于不同钢的焊接接头而言,各接头母材之间、热影响区之间的腐蚀差异主要与其化学成分有关,但焊缝金属和熔合区之间的腐蚀差异则主要取决于夹杂物和微观组织.而同一焊接接头的不同区域的耐蚀性表现了较大差别,有的以焊缝的耐蚀性较差,有的则以母材的耐蚀性较差,导致不同区域耐蚀性差异的主要因素是化学成分、夹杂物、微观组织等.Abstract: The corrosion behaviors of four low-alloy steels welded joints have been studied by indoor exposure tests and electrochemical tests and the composition, inclusions and microstructures of such joints were also researched, For the different joints, the corrosion resistance of the parent-metal and heat-affect-zone is mainly dependent on the compositions of the steels; while the corrosion resistance of the welded bonds and welded metal is mainly dependent on inclusions and microstrures. For three distinct zones of the same welded joint, the corrosion resistance is different from each other. The corrosion resistance of distinct zones for the same welded joint is closely related to the chemical compositions, inclusions and micro-structures of the distinct zones respectively. 相似文献
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S. V. Aleksandrov K. Hulka A. M. Stepashin Yu. D. Morozov 《Metal Science and Heat Treatment》2005,47(11-12):497-501
The strength and ductility characteristics, toughness parameters, and structure of low-alloy steels after thermomechanical treatment are studied. Analysis of the properties of steels with various manganese-to-niobium ratios is performed. An optimum chemical composition for sheet steel subjected to thermomechanical treatment is suggested. 相似文献
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Conclusions Niobium in low-carbon and low-alloy steels combines carbon in NbC. The carbon is completely combined when the niobium to carbon ratio is about 1.51. A relationship was found between the carbon content of the solid solution and the niobium content of the steel: The greatest reduction in the carbon content of the solid solution occurs with the addition of 0.05–0.1% Nb. With larger niobium concentrations the amount of carbon dissolved in ferrite continues to decrease, but at a lower rate.The increase in the fracture toughness of steel is inversely proportional to the carbon content of the solid solution.I. P. Bardin Central Scientific-Research Institute of Ferrous Metallurgy. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 1, pp. 15–18, January, 1978. 相似文献
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Metal Science and Heat Treatment - 相似文献
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Robert E Melchers 《Corrosion Science》2003,45(11):2609-2625
This paper attempts to reconcile information from a number of different sources about the effect of small changes in carbon content on the immersion corrosion of specimens of normal commercial mild and low alloy steels. It does so through interpreting the data reported in the literature in terms of the recently proposed theoretically based phenomenological model for marine immersion corrosion. This model postulates different corrosion phases as corrosion progresses. When the experimental results are interpreted in terms of the model it is found that carbon content has minimal effect on the kinetically controlled corrosion phase. The next phase, when corrosion rate is controlled by oxygen diffusion, is also unaffected, in agreement with theoretical predictions. However, carbon content does affect the two anaerobic phases, with increased corrosion as the carbon content and the water temperature increase. The model allows apparently conflicting observations to be reconciled and shows that carbon content may be influential for longer-term corrosion and for corrosion in tropical waters. 相似文献
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随着海洋资源的不断开采和利用,对深海及极地用海洋工程关键部位用钢强韧性等综合性能提出了更高的要求;开发具有更高强塑性,低屈强比,良好的低温韧性、焊接性以及耐腐蚀性等综合性能优良的钢材是海洋工程用钢的发展方向。介绍了国内外低碳低合金海洋工程用钢的研究和发展概况,分析了该类钢种制造过程中面临的问题,对铜在低碳高强钢中的作用以及含铜海洋工程用钢的研发情况进行了综述。 相似文献
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M. A. Shumilov V. I. Bondar' L. N. Kudryavtseva K. N. Sokolov L. P. Tarasova 《Metal Science and Heat Treatment》1976,18(10):896-898
1. | The addition of 0.13% As to steels 16GS, 16G2SF, and 18G2SF increases the ferrite grain size and raises the critical points of steels 16GS and 16G2SF. |
2. | Alloying of ferrite with arsenic leads to an increase in the rate of grain boundary migration. |
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