共查询到20条相似文献,搜索用时 156 毫秒
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利用自制组合式磨料浆射流除鳞设备进行Q235带钢抛丸除鳞效果研究。采用扫描电镜对干式抛丸和湿式抛丸除鳞后的钢板表面进行观察与分析,并进行能谱分析,采用IXRD残余应力测试仪对除鳞前后钢板表面的残余应力进行测量。比较两种抛丸方式氧化铁皮的去除效率和表面残余应力,并分析湿式抛丸除鳞抛射距离、时间和钢丸粒径对表面残余应力的影响。结果表明:湿式抛丸比干式抛丸除鳞后钢板表面氧含量更低,氧化铁皮除净率高,且表面残余压应力较低。湿式抛丸除鳞中随着抛射距离的减小、抛射时间和粒径的增加,钢板表面残余压应力值也增加。 相似文献
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运用模拟试验方法,对SUS430钢种经罩式退火后的热轧卷采用不同的抛丸工艺,观察抛丸工艺对除鳞能力及材料表面粗糙度的影响。通过试验发现,磨料种类、抛丸速度和抛丸流量对除鳞能力的影响显著。磨料种类对失重率的影响最大,抛丸流量的影响次之,抛丸速度的影响最小;磨料种类和抛丸速度对带钢表面粗糙度影响显著,而抛丸流量对带钢表面粗糙度的影响不显著,磨料种类对表面粗糙度的影响较抛丸速度高。因而,对SUS430钢种热轧卷采用适合的磨料、比较高的抛丸速度以及大的抛丸流量是不明显增加表面粗糙度的情况下提高除鳞能力的有效方法。 相似文献
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综述了利用高压水除鳞技术除去钢坯表面氧化铁皮的工艺,特别是结合棒材厂中型线技术改造后生产特殊钢种的工艺要求,论述了如何更好用高压水去除钢坯表面氧化铁皮,提高钢材的加工质量。通过实践表明,高压水除鳞系统水压和流量所产生的打击力对除鳞效果至关重要。 相似文献
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针对国内某钢厂首次生产40CrNiMoA时采用高温加热工艺,除鳞效果差,导致棒材表面凹坑缺陷严重,需要滚磨及报废处理,影响精整周期增加成本.通过金相及电镜分析,40CrNiMoA氧化皮中富集的Ni金属丝粘连氧化皮与基体,为除鳞效果差的主要原因,通过降低加热温度,成功改善除鳞效果,提升棒材表面质量. 相似文献
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型材表面除鳞与铸件表面除鳞的情况差别极大。本文以圆截面型材为例,借助计算机建立起模拟抛丸除鳞机丸粒飞行路线和打击坯料达到的除鳞效果的程序,并在此基础上探讨了在给定叶片宽度时,对某一导板调节的优化;在导板优化基础上,对给定产品规格范围进行叶片宽度的优选设计。 相似文献
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分析了抛丸机不同转速和钢丸粒度等生产工艺对不锈带钢表面粗糙度的影响。通过总结实际生产经验,采用低叶轮转速的抛丸工艺,通过优化钢丸的加料方式,保证了抛丸机钢丸颗粒度的稳定,减少了钢丸粒度的波动,有效降低了不锈带钢表面的粗糙度,保证了不锈带钢表面抛丸处理的效果。 相似文献
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B. Kura S. Sangameswaran K. Kambham X. Silvadasan 《Canadian Metallurgical Quarterly》2006,132(12):1617-1625
The performance of an abrasive is dependent on its properties as well as the operating conditions during blasting. This study was undertaken to simulate enclosed blasting operations using steel shot and grit on rusted and painted steel panels; and collect and measure total particulate matter (PM) emissions at commonly used blast pressure and feed rate settings. U.S. EPA source sampling methods were used to sample emissions and estimate uncontrolled total PM emission factors. Regression equations expressing total PM emissions as function of blast pressure and abrasive feed rate were developed to estimate uncontrolled total PM emissions. The results of this study will be helpful in controlling emissions, developing emission inventories, developing best management practices, and selecting process parameters corresponding to minimum emissions for steel shot and grit. 相似文献
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铝电解阳极导杆钢爪清理机的改进与设计 总被引:1,自引:0,他引:1
结合本单位阳极组装生产线上钢爪清理机的实际应用,针对已使用过的清理阳极导杆组钢爪表面的抛丸机和钢丝清刷机两种机械存在的缺陷,提出应用钢丝绳清理机这一新型设备清理钢爪表面。文章介绍了新型清理机的结构形式、工作原理及其使用效果。 相似文献
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Charudatta Pathak Prathamesh Dodkar 《Transactions of the Indian Institute of Metals》2020,73(3):571-576
This paper investigates the effect of shot blasting and shot peening parameters on residual stresses induced in connecting rod. Compressive residual stresses are induced using shot peening to increase fatigue life of connecting rod. Shot peening is also responsible for increase in surface roughness. Surface roughness is detrimental for fatigue life of the connecting rod. This necessitates shot blasting to reduce surface roughness. Shot peening and shot blasting processes are analysed to find optimum process parameters which will induce required value of compressive residual stress on the surface of connecting rod. Compressive residual stresses induced in the connecting rod specimen have been experimentally measured using X-ray stress analyser. The experimental results have been analysed using grey relational analysis to find optimum values of process parameters for target value of compressive residual stress and surface roughness. The experimental investigation and the analysis of it have resulted in achieving the desired value of compressive residual stress, which is 10.5% higher over the existing connecting rod. Surface roughness also decreases to 3.84 Ra which is 8.5% lesser than specified value to achieve better fatigue life. 相似文献
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对莱钢棒材厂轧钢车间热轧带肋钢筋袁面起泡问题进行了分析,得出终轧温度过高,冷却强度不足及冷却不均是造成起泡缺陷的重要原因。通过采用高效冷却装置后,表面起泡缺陷完全消除,并且力学性能得到了提高。 相似文献
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