共查询到19条相似文献,搜索用时 757 毫秒
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针对石钢在生产28MnSiB低碳弹簧钢方坯过程中,表面存在的裂纹缺陷进行分析和研究,提出了关键生产工艺参数控制的范围及改进措施,对减少裂纹取得了显著效果。 相似文献
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介绍了伏尔加汽车制造厂生产轿车用悬挂弹簧钢的新工艺,从冶炼,轧制到冷拔的全部工艺过程,以及所采用的设备,还介绍了钢材所用标准。化学成分,表面质量以及所采用的生产措施等,所产钢材在世界市场上有竞争力。 相似文献
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弹簧钢的表面质量要求高,尺寸精度要求严格,允许的表面脱碳层浓度浅,对表面硬度和断口石墨碳也有特殊要求。本文介绍了其轧制工艺,较远地保证了弹簧钢的轧制质量。 相似文献
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介绍高速铁路用弹簧钢38Si7线材生产技术要求和工艺开发过程,从孔型系统、料型制度、生产管理等方面进行了优化,逐渐扩大南钢高速铁路用弹簧钢38Si7线材市场占有力。 相似文献
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对弹簧钢盘条在生产过程中存在的问题进行了研究,分析了非金属夹杂物、表面缺陷和脱碳对弹簧钢产品质量的影响,并提出控制措施,为提高弹簧钢盘条的性能和质量提供了解决方向。 相似文献
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弹簧钢连铸坯中心偏析的研究 总被引:1,自引:0,他引:1
为了探讨真空精炼和过热度对弹簧钢连铸坯中心偏析的影响,采用两种生产工艺:转炉→LF→VD→连铸和转炉→LF→连铸,并取不同的过热度(30℃和22℃),生产60Si2 Mn弹簧钢连铸坯。在矩形坯上取样分析碳和硫的偏析情况,并进行对比。其结果是:经过真空精炼,连铸坯的碳偏析指数从1.72降低到1.28;硫偏析指数从2.68降低到1.68。 相似文献
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150t转炉生产弹簧钢通过将终点碳控制在0.10%~0.20%、根据终点碳调整预脱氧剂电石的加入量及采用铝进行终脱氧的工艺优化;LF炉采用CaO-SiO2-Al2O3-MgO-CaF2渣系;对钢中Al2O3进行钙处理避免小方坯连铸浇注含铝钢中包水口结瘤等工艺措施,有效降低了弹簧钢成品材的氧含量。 相似文献
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油淬火-回火弹簧钢丝生产技术现状及发展方向 总被引:1,自引:0,他引:1
油淬火-回火弹簧钢丝是生产制造轿车悬挂弹簧和发动机气门弹簧的原料,这两类弹簧在汽车工业零部件中属于"D"级产品,即按相关规定,一旦发现有缺陷整车必须强制召回.所以,对该用途的钢丝有着极高的可靠性和安全性要求.油淬火-回火弹簧钢丝和汽车轮胎用钢帘线并称为钢丝制品的顶级产品.文章介绍了油淬火-回火弹簧钢丝的常用钢种,以及国外的钢种开发、生产技术关键及发展趋势,同时也介绍了目前国内技术水平和生产状况,并提出了改进措施和发展方向. 相似文献
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《Baosteel Technical Research》2010,(Z1):60
The variety,inner quality and surface quality of low-alloy spring steel wire rod for domestic automobile is summarized in detail.And according to commercial low-alloy spring steel wire rod variety, product quality level and its actual application situation on automobile supplied by present industrially developed country metallurgy enterprises,it is pointed that the variety of low-alloy spring steel wire rod for domestic automobile can’t satisfy the requirements of automobile industry development,compare with overseas advanced technology,product quality has the following gaps:the first is that steel purity is low,the control level of non-metallic inclusions is not steady,there is often large grain difficult deforming non-deformation inclusions existing,the control level of steel purity has big difference,the level of large steel factory is high,but its steady has a large gap compare with foreign advanced level,not to mention small steel factory which research and development powder is low.The second is surface complete decarburization can’ t be avoided completely.The third is that surface defects are more.The fourth is that composition segregation and structure segregation are not steady,steel wire can’t be drawn normally when the segregation is serious. In all,the segregation of 55SiCrA is superior to 60Si2MnA obviously.The industrialization of domestic high level low-alloy spring steel wire rod can’t seek quick success and instant benefits,independent innovation perseveringly must be adopted,the success may be reached after master core technologies and adopt the science way of step by step. 相似文献