共查询到19条相似文献,搜索用时 500 毫秒
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随着太钢不锈钢高线的开发,不锈钢盘条的酸洗成了制约高线开发的重要环节.为了摸索出一套行之有效的酸洗工艺、方法,进行了一系列酸洗试验,本文通过大量试验分析了不同酸洗方法对不同钢种的影响,并提出了适用于生产实践的酸洗方法。 相似文献
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对不同材质冷轧不锈钢带钢酸洗提出了工艺流程和设计参数,概述了不锈钢各种酸洗方法的酸洗机理、不锈钢酸洗废气处理和废酸再生技术。 相似文献
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加入WTO后,中国的不锈钢线材及其制品市场与亚太地区市场及世界市场密不可分。2010年前,国内对不锈钢线材的需求仍会有稳步增长。大连钢铁集团为发挥合金钢线棒材轧机的优势和能力,对炼钢工序、热处理工序和酸洗工序进行配套改造,将迅速实现不锈钢线材的专业化生产。从2002年起,以大钢和太钢为主的不锈钢线材产品将满足国内市场对高线生产的不锈钢线材的需求。 相似文献
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以宝钢为例,对不同材质的热、冷轧不锈钢带钢提出酸洗工艺流程和设计参数,概述不锈钢各种酸洗方法的酸洗机理,介绍不锈钢酸洗后的废水处理方法。 相似文献
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分析了不锈钢盘条与板带酸洗工艺的区别以及氧化皮的特点,并在不同条件下对304不锈钢盘条进行热处理试验,在此基础上对不锈钢热轧线材表面处理的工艺技术进行了研究。结果表明:不锈钢盘条酸洗工艺要与固溶工艺合理搭配;固溶温度采用1050℃,炉内w(O)在8%~12%之间,时间控制在60~90min,酸洗时间一般为20~40min。 相似文献
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用硝酸和氢氟酸作为钢材酸洗介质,会产生相当多的酸洗废液,废液如果直接排放会严重污染环境,而且浪费资源.介绍了不锈钢酸洗废液的产生机理以及各类酸的再生工艺,并对近年来国内酸洗废液资源化利用及处理技术的研究成果作了分析.根据不锈钢酸洗行业的特点,指出开发具有资源化与无害化酸洗废液处理新技术是必要的,同时也介绍了适合不锈钢生产厂应用的酸再生和废水处理工艺组合. 相似文献
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Peiyang Shi Haonan Shi Chengjun Liu Maofa Jiang 《Canadian Metallurgical Quarterly》2018,57(2):168-175
Oxide layer formed on stainless steel surface can result in a decrease in surface quality. Thus, it must be removed. In this paper, we investigated the effect of different pickling processes on removal of the oxide layer. Ferritic stainless steel was used as raw material. After it received annealing treatment, the components and structure of the oxide layer formed on its surface were studied. Then, the annealed stainless steel was pickled in hydrochloric acid solution system and mixed acid solution system, respectively. Results are as follows. The oxide layer on stainless steel surface has a thickness of 15–35?μm. With increase in hydrochloric acid concentration in hydrochloric acid pickling solution, the weight loss rate of stainless steel increases and is always greater than that in mixed acid pickling system. In addition, the surface of the stainless steel pickled in hydrochloric acid is smoother than that pickled in mixed acid. Furthermore, compared with channels in the oxide layer created during mixed acid pickling, those created during hydrochloric acid pickling are more, leading to shorter removal time. These results are important for increasing the pickling efficiency and improving the surface quality of stainless steel. 相似文献
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在卧式连续喷淋酸洗机组上,利用原设备和H2SO4+(HNO_3+HF)酸洗液技术酸洗双相不锈钢中厚板,酸洗后表面出现浅灰色、下表面辊印缺陷。针对这些缺陷,以S32205双相不锈钢板为代表牌号,论述一种两段式混酸(HNO_3+HF)液酸洗方法,开展了两段式混酸(HNO_3+HF)液酸洗方法的实验室、工业化工艺试验和研究,并对原卧式喷淋酸洗生产线进行了技术改造。应用两段式混酸(HNO_3+HF)液工艺技术酸洗S32205钢板,在预先酸洗工艺段,混酸液HNO_3质量浓度为180g/L、HF质量浓度为90g/L,混酸液温度为43℃;在最终酸洗工艺段,混酸液HNO_3质量浓度为265g/L、HF质量浓度为56g/L,混酸液温度为43℃,一次酸洗合格率达到95%以上。从技术上解决了双相不锈钢中厚板酸洗后表面出现的浅灰色、下表面辊印缺陷,酸洗后的钢板表面呈银白色,色泽均匀,满足了双相不锈钢板产品标准关于表面质量的要求。 相似文献
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将不锈钢热轧酸洗卷厚度精准地控制在靠近下规范限,可大大提高产品竞争力。运用六西格玛方法深入地分析了影响不锈钢热轧酸洗卷厚度精度的各类因素,确定了改进措施并实施改进,达到了预期目标。 相似文献
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Xiang-hong L Fu-xiang ZHANG Xiang-tong YANG Jun-feng XIE Guo-xian ZHAO Yan XUE 《钢铁研究学报(英文版)》2014,21(8):774-780
High pressure and high temperature corrosion performance of high strength 15 Cr martensitic stainless steel was studied in different severe environments—live acid(10%HCl+1.5%HF+3%HAc+5.1% corrosion inhibitor),spent acid and formation water containing CO2.The results show that the corrosion of high strength 15 Cr martensitic stainless steel in live acid is most serious,and the uniform corrosion rate is far greater than those in spent acid and formation water containing CO2 corrosion environments,but all of them can be acceptable for oilfield.Acidizing corrosion inhibitor displays a good matching ability with the high strength 15 Cr martensitic stainless steel in terms of decreasing the uniform corrosion rate,which changes mainly the anodic process of high strength 15 Cr martensitic stainless steel.The corrosion potential moves to the positive direction,thus the corrosion current density decreases significantly.There are some different degrees of pitting of high strength 15 Cr martensitic stainless steel after corrosion tests in live acid,spent acid and formation water containing CO2,and the pitting density aggravates significantly and the maximum pit depth decreases in the corrosion sequence. 相似文献
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余旭 《金属材料与冶金工程》2005,33(3):27-29
通过实践摸索泵的泄漏、振动及泵综合使用性能和关键部件的寿命、底座寿命与整机完好运行时间的内在联系,试图寻找一种合理经济的耐腐蚀不锈钢底座及泵身材质,以期延长ZA200-315A型及HC200-250A型不锈钢耐酸泵的整机运行寿命。实践表明,经技术改进后的钢泵,其寿命均有很大程度的提高。 相似文献