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45A钢方坯夹杂物行为研究翟俊1,吴巍1,吴伟1,周远华2,熊银成2,胡兵2(1.北京市钢铁研究总院冶金工艺研究所2.重庆钢铁股份有限公司,重庆 400084)摘 要:为了了解45A钢铸坯夹杂物行为,利用显微镜,电子探针和大样电解等分析方法对45A钢铸坯中夹杂物分布,数量和种类做了分析.结果表明:铸坯夹杂物整体控制水平较好,其中铸坯夹杂物指数平均为22.2个/mm2,铸坯中心夹杂物指数为25.8个/mm2;铸坯大样电解结果表明大型夹杂物总量平均为2.23 mg/(10 kg),夹杂物直径都大于300μm;大型夹......
减少冷轧IF钢表面条痕缺陷的生产实践曾建华1,吴国荣2,陈永2,杨素波3,杨金成3,赵克文4(1.四川省攀枝花市 攀枝花钢铁研究院材料研究所2.攀枝花钢铁研究院 材料所,四川攀枝花 6170003.攀钢钢钒公司 技术质量部,四川攀枝花 6170634.攀钢(集团)公司 科技部,四川攀枝花 617067)摘 要:针对攀钢IF钢冷轧板出现的条痕缺陷,在对冷轧板,热轧板及铸坯取样分析的基础上,得出铸坯皮下微裂纹,浇铸过程保护渣卷渣以及铸坯中的夹杂物是IF钢冷轧板条痕缺陷产生的主要原因.通过采取降低钢包顶渣氧化性,控制......
on these correlations. The upper threshold of fluxes of organic carbon from surface to subsurface sediment varies from 0.04 mmol/(cm2·a) to 0.16 mmol/(cm2·a) with the mean of 0.10 mmol/(cm2·a) from 3.../(cm2·a)(表2). 表2 CTOC垂向浓度梯度,生物扰动系数和TOC输送通量 Table 2 Concentration gradient of TOC, bioturbation coefficients and fluxes of TOC 需要指出的是:式(3)主要是基于生物扰动导致的深层沉积物中APbex与CTOC之关系来计算扰动过程对TOC的输送,虽然模型中......
), the Bi26Mo10O69-coated BCFN membrane exhibits higher oxygen permeability and CH4 conversion than the uncoated BCFN membrane. When the thickness of BCFN membrane was 1 mm and the COG and air fluxes were... oxygen fluxes compared with other organic membranes [6,7]. Among these materials, BaCo0.7Fe0.2Nb0.1O3-δ (BCFN) shows high oxygen permeability and better chemical stability under reducing......
that the necessary pretreatment time (NPT) increases with PAAS concentration, decreases with TMP. The change trend of permeate flux with time is affected by pH. The permeate fluxes rapidly decrease... of small molecular PAAS molecules. The permeate flux increases from 15.4 L/(m2·h) to 31.7 L/(m2·h) with the increase of pH from 3.0 to 7.0. The permeate fluxes at various pH values are affected not only......
-activity boron addition technique was emphasized. Aiming at the purification problem of Mg-RE alloys, the dedicated fluxes were introduced. Moreover, the non-flux purification methods including MgO... by fluxes containing GdCl3 additions[J]. Mater Sci Eng A, 2009, 507(1/2): 207-214. [12] 高洪涛. 镁合金熔剂净化行为及理论研究[D]. 上海: 上海交通大学, 2006.GAO Hong-tao. Flux purification behavior and theory for magnesium alloy[D......
process controls partly the enrichment of Ti in crust. However, the enrichment fluxes of Ti change during the cobalt-rich curst growing, which could be induced by the multiple material sources... Fig.5 Relationship between Ti fluxes and growth rate of crust C5 4 结论 1) C5结壳无论是新壳层还是老壳层,均出现水羟锰矿,非自形的FeOOH?xH2O,石英,长石和方解石等矿物.但老壳层中还出现碳氟磷灰石,钡镁锰矿和针铁矿等矿物. 2) C5结壳为水成成......
,Beijing,where REE fertilizers are widely applied. The input and output fluxes of all kinds of REEs in the soil and plant system were measured using ICP-MS. The results show that the total amount......
the conditions of steady-state diffusion in GM, unsteady-state diffusion in GM and without GM. The bottom fluxes of organic contaminants under the three conditions were compared. The results show......
were processed by SPSS software. The regression equation of fluxes was established by means of regression analysis. The influences of the preparing conditions of the CMPSF/PSF membrane......