共查询到19条相似文献,搜索用时 62 毫秒
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介绍了00Cr25Ni7Mo4N在冶炼过程中高N含量控制工艺和钢质纯净度控制工艺。通过确定合理的控N及吹Ar参数,实现精确N含量控制;通过进行Al、Si-Ca及稀土强化脱硫脱氧,保证了良好的钢质纯净度。 相似文献
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从成分控制、热轧和热处理等角度出发,综合研究双相不锈钢S32101的生产工艺并进行优化调整,分析生产试验数据。研究分析表明:在1050~1150℃固溶处理时,组织中铁索体组织与奥氏体组织的比例接近1:1,钢的综合力学性能最佳。 相似文献
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253MA是在21Cr-11Ni不锈钢的基础上,通过N合金化和添加稀土元素Ce开发的耐热纯奥氏体不锈钢。由于该钢种的熔点与碳钢相比偏低,钢液的流动性差,因此如何解决氮气合金化、稀土添加等问题,是冶炼过程中的工艺难点。本文通过对不同稀土加入方式、过程脱氧、夹杂物控制以及精确控N模型等相关工艺的研究,成功完成了253MA的冶炼连铸,为生产板材创造了良好的条件。 相似文献
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《不锈(市场与信息)》2008,(5):12-12
与太钢新不锈钢工程配套的焦化项目煤调湿干燥机主体不锈钢板材的自主研制取得重大突破,超级双相不锈钢S32750中板开发成功,成为国内首家成功生产超级双相不锈钢的企业。 相似文献
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The sigma-phase distribution in a 2507 super duplex stainless steel continuous casting slab is analyzed using microstructural analyses and thermodynamic calculations. The sigma phase contains high Cr and Mo contents, and precipitates along the phase boundary between austenite and ferrite and grows toward the interior of the ferrite phase in the continuously cast slab. The sigma-phase fraction at the center of the width direction is higher than that in the one fourth width. Furthermore, the sigma-phase fraction at the center of the thickness direction is higher than those at the upper and lower surfaces, which is due to the lower cooling rate at the center. The Brinell hardness (HB) at the center increases to 313 HB with an increasing sigma-phase fraction. The sigma-phase fraction at the one fourth thickness near the lower surface is higher than that at the one fourth thickness near the upper surface at the same cooling rate. Additionally, Mo and Ni are severely segregated in this zone. A higher Mo content influences the precipitation and stabilization of the sigma phase. Furthermore, Scheil–Gulliver calculations indicate that compositional segregation results in an increase in the sigma-phase precipitation temperature range. 相似文献
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分析了双相不锈钢的焊接特性,介绍了常用的焊接材料、方法和工艺,阐述了国内外双相不锈钢焊接方面的研究进展。 相似文献
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