用钡合金对齿轮钢脱氧的工艺研究

为提高钢的洁净度,在50t EAF-60 t LF流程中采用钡合金对齿轮钢进行脱氧试验,通过控制电炉出钢碳含量、充分地铝预脱氧并用钡合金进行终脱氧和夹杂物变性,可使铬铝系SCM822H齿轮钢的氧含量降至0．0015％以下。     

钡系合金脱氧基础研究

本文对钡及钡合金进行了理论研究，探讨了钡合金脱氧，脱硫等精炼效果及应用的可行性，通过实验测定了硅钡，硅钙钡两种钡合金的脱氧及脱硫能力曲线。     

钡合金脱氧钢中的非金属夹杂物

对连铸坯和模铸坯共进行38炉工业生产试验。结果表明,新型Ba-Si合金脱氧剂,对钢材性能、脱氧工艺、钢中非金属夹杂物等方面的影响与Ca-Si合金脱氧工艺相当,但明显降低了成本,提高了经济效益,减轻了对环境的污染,Ba-Si合金完全可以代替Ca-Si合金脱氧。     

硅钡合金在炼钢脱氧中的应用研究

从理论上对Ｂａ,Ａｌ,Ｃａ等３种元素和脱硫能力进行了分析对比,并在生产实践中对Ｓｉ－Ａｌ－Ｆｅ,Ｓｉ－ＣａⅡ,Ａｌ,Ｓｉ－Ｃａ等５种合金进行了对比试验,通过对试验结果的分析,发现Ｓｉ－Ｂａ合金具有较强的脱氧能力和使夹杂物变质的能力,同时,还能脱硫。用Ｓｉ－Ｂａ合金处理的钢材,其冲击韧性得到了明显改善。     

硅钡合金在电炉炼钢脱氧中的应用

通过对比试验的方法，研究了采用Ｆｅ－Ｂａ－Ｓｉ－Ａｌ对电炉钢终脱氧的冶金效果。结果表明，所设计的Ｆｅ－Ｂａ－Ｓｉ－Ａｌ能满足脱氧的要求，钢中的残余氧含量与铝脱氧相当，而钢的净洁度有所改善     

钡合金脱氧生产轴承钢的研究及作用机理分析

从轴承钢生产的角度,对炼钢生产中使用的钡合金的脱氧效果进行了实验研究,结果表明:钢中氧迅速降低到一稳定值,含钡夹杂物较易从钢中排除,钢锭的夹杂物总量显著降低,因此钡系合金处理钢液可使钢液纯净化.     

用含钡合金进行钢水脱氧的工业试验研究

在实验室研究的基础上,用150 t LF/VD精炼设备进行了含钡合金对钢液脱氧的工业试验研究.分别采用SiAlBaCa、FeSiAl、铝合金进行大生产试验和对比试验.结果表明,经含钡合金处理的钢液,夹杂物聚集、长大和上浮的速度快,钢的氧含量低,夹杂物呈球形,且尺寸细小、分布均匀.     

Deoxidation Behavior of Alloys Bearing Barium in Molten Steel

Asdeoxidizers ,siliconandmanganesewereusedinearlysteelmaking ,andaluminiumwasalsoadoptedsevendecadesago .Recently ,variouscom plexdeoxidizershavebeendeveloped ,amongwhichthealloysbearingbariumattractmoreattention .In196 9,HiltyDCetal[1] usedalloysbearingbariumtotreatmoltensteelforthefirsttime .Inthe 1970s ,variousalloysbearingbariumwereusedtotreatmorethan 2 0steelgradesinAmerica ,JapanandformerSoviet ,andmeantimealargeamountofpa persandbookswerepublished[2 -6] .InChina ,alloybearingbariumwa…     

镁合金对钢液脱氧脱硫的作用

用镁合金脱氧剂在MgO质感应炉上对低碳钢进行了脱氧行为的研究.实验主要选取AlMg、SiCaBaMg、SiCaBaAlMg镁系合金与Al进行脱氧对比,考察了脱氧后钢水的T[O]、[S]以及夹杂物的变化情况.与Al相比,SiCaBaAlMg包芯线、AlMg 1#脱氧效果较明显,镁合金在脱氧的同时具有稳定的脱硫能力,并且脱氧后夹杂物的粒径有不同程度减小.     

低成本冶炼高质量轴承钢工艺探讨

分析了影响GCr15轴承钢质量的主要因素及各冶炼工序对轴承钢质量的影响 ,提出了非真空钢包精炼及钡合金处理轴承钢工艺 ,采用该工艺可使轴承钢w (O)降到 10× 10 -6以下 ,钡合金处理钢的疲劳寿命比真空铝处理钢高 6 3.5 5 % ,而每吨钢成本比真空处理钢降低 10 0元。同时 ,对转炉冶炼轴承钢工艺进行了探讨。     

60Si2Mn(A)弹簧钢的脱氧工艺

为了提高60Si2Mn(A)弹簧钢的质量,在LF精炼中进行了不同脱氧工艺的脱氧试验。结果表明:采用铝预脱氧、钡合金终脱氧及夹杂物变性脱氧工艺可使弹簧钢的氧含量降低到15×10-6以下,氧化物夹杂中Al2O3的比例小于40%。     

熔盐电解法制备钨铜合金粉

在NaCl-KCl-Na2WO4-CuO体系中采用熔盐电解法直接制取钨铜合金粉,并对产物进行了XRD、SEM及EDS分析。结果表明,在780～800℃电解、阴极电流密度106～133mA/cm2、电解时间3～4h、电压2.2～3.2V的条件下,可以得到纯度99%以上、平均粒度0.91μm的钨铜合金粉末,各项指标基本达到了工业上烧结钨铜合金的要求。     

浸渍管在ANS—OB钢水处理过程中的作用

介绍了ＡＮＳ－ＯＢ钢水处理装置的组成，工艺条件及特点，对ＡＮＳ－ＯＢ钢水处理装置中的浸渍管理进行了研究，通过流场及采样分析，阐明了浸渍管对空气的屏蔽作用及挡渣作用，分析了采用浸渍管后对钢水均匀混合时间及钢水夹杂物含量的影响。     

提高低合金钢钢水质量的研究

结合攀钢实际情况,在生产低合金钢时,出钢过程向钢包内加入高碱度精炼渣,出钢后加入调渣剂,并在LF炉补加少量高碱度精炼渣和0.30～0.60 kg/t铝丸;以及将精炼后钢包底部软吹氩时间延长至6 min以上,改善了钢中夹杂的去除条件,大幅度提高了钢水质量,钢中T[O]平均为14.69×10-6,[S]平均为0.007%,[N]＜50×10-6,非金属夹杂中B、C类夹杂较少,A、D类夹杂多为0.5级.     

Final Temperature Prediction Model of Molten Steel in RH-TOP Refining Process for IF Steel Production

 In order to precisely control the final temperature of molten steel in RH (Ruhrstahl Heraeus)-TOP blowing refining, the final temperature prediction models of molten steel in RH-TOP blowing refining process for Interstitial Free (IF) steel production were established under the condition of oxygen blowing and non-oxygen blowing respectively. The results show that the beginning molten steel temperature of refining and the amount of added scrap were influential factors, the baking temperature in vacuum chamber was a factor that had small influence. When the model was operated, the hitting probability was above 95% (under the condition of both oxygen blowing and non-oxygen blowing) of prediction deviation of ±10 ℃. The accuracy is analyzed.     

Chemical Composition Control of Non-Metallic Inclusions in High Alloy Steel Production Process

There is a close relation between the characteristics of products and the chemical composition control of inclusions in steelmaking process. Therefore, it is very important for a warranty of product’s characteristics to improve inclusion quality resulting in defective products. In the present work, the control technique of inclusions’ chemical composition is discussed thermodynamically based on the Redlich-Kister type polynomial to metallic solution and regular solution model to molten oxide solution. It is very effective for the precise chemical composition control of oxides to determine the concentration of deoxidizers based on the thermodynamic relation among dissolved deoxidizers and oxygen, because it is known that oxide inclusions are equilibrated with them in molten steel in the steel making process. High alloy steel production process was focused in the present work.