利用转炉-RH-连铸工艺路线生产BGD钢的工业试验

在本钢现有设备条件下，利用转炉-RH-连铸工艺路线进行BGD钢的生产工业试验。工业试验表明，本钢BGD钢的生产工艺合理、可行，在本钢现有设备条件下可以进行批量生产。本钢BGD钢的成分控制难点是钢中的碳含量、硫含量和[Al]（s）含量。如何有效控制BGD钢在浇注过程中的增氮问题，尚有待于进一步深入研究。     

新型气硬动物胶型芯粘结剂的改性工艺优化

针对动物胶常温凝聚、热硬消耗能源且效率低的问题,以动物骨胶为主要原料,经过碱解、改性处理后得到了一种新型型芯粘结剂,并采用吹CO₂气体方式硬化.选择并优化了动物胶碱解工艺,引入活性基团对动物胶进行接枝共聚以及酯化改性,进一步提高了粘结强度,同时对新型动物胶粘结剂的吹气硬化和改性机理进行了理论分析.结果表明：改性动物胶铸造粘结剂最佳配比为m（丙三醇）∶m（糊精）∶m（乙醇）∶m（动物胶）=9∶10∶9∶100,改性温度为75℃,改性时间为90 min.吹CO ₂气体硬化的新型改性动物胶粘结剂,初强度大于0.8MPa,终强度达到6.0MPa,能够满足快速制芯生产要求.     

无氧铜的冶炼和铸造

概述了纯铜的冶铸特性，全面介绍了无氧铜冶炼方法、试验结果和铸造要领。     

消失模法铸渗表面合金层组织研究

利用消失模铸造法制备了表面耐磨合金材料,并研究了其组织与性能.结果表明铸渗合金层由表向内,碳化物类型由M7C3型向M3C型转变,硬度逐渐降低,碳化物含量逐渐减少;热处理后,碳化物含量和材料硬度增加,但铸渗层由外向里碳化物含量与硬度逐渐降低及碳化物由M7C3型向M3C型转变这一趋势不变.     

涂层转移法精密铸造技术在子午线轮胎模具制造中的应用

子午线轮胎模具计算机辅助快速制造系统是由ＣＡＤ技术、快速成型技术、涂层转移法精密铸造技术、材料技术等多项高新技术组合而成的一项独特的先进制造技术。该系统充分利用液态材料成型任意性和高再现性的特点，具有适应性强、重复性好、加工周期短、制造成本低的特点。     

冷轧表面夹杂断带的研究

文章介绍了通过对轧制过程中出现边裂、边部孔洞并断带的冷轧板进行分析,结果表明断带是由连铸坯中夹杂物引起的,并针对这种情况提出了改进措施。     

钛微合金化S355JR钢板冲击不合原因分析及改进措施

针对普阳钢铁有限公司生产的6 mm厚钛微合金化S355JR薄规格钢板出现室温冲击不合的问题,对其化学成分、组织性能及生产工艺进行了分析。结果表明,连铸二冷强冷细化了TiN颗粒,使加热时更多的有效Ti溶解并于轧后析出,导致铁素体硬化是钢板常温冲击不合的原因。为此,在不便改变连铸工艺的前提下,调整了S355JR钢的化学成分,严格控制C、Ti含量,并将Mn质量分数由1.2%降至1.0%,有效地改善了6 mm厚S355JR钢板的常温冲击性能,提高了产品合格率。     

Investigation of ductile iron casting process parameters using Taguchi approach and response surface methodology

To find the optimized levels of various casting parameters in the ductile iron casting, various casting defects and the rejection rate were observed from a medium scale foundry. The controlled values of different casting parameters such as pouring temperature, inoculation, carbon equivalent, moisture content, green compression strength, permeability and mould hardness were selected. Three different melts of metal with 0.4wt.%, 0.6wt.%, and 0.8wt.% inoculation(Fe-Si-Mg alloy and post inoculant) were produced using a 1-ton capacity coreless medium frequency induction furnace. L-27 orthogonal array with 3-level settings were chosen for the analysis. Responses for each run were observed. The signal-to-noise(S/N) ratio for each run was calculated using the Taguchi approach, and the optimized levels of different casting parameters were identified based on the S/N ratio. The analysis of variance for the casting acceptance percentage concludes that inoculation is the most significant factor affecting the castings' quality with a contribution percentage of 44%; an increase in inoculation results in a significant improvement in acceptance percentage of ductile iron castings. The experiment results showed that with the optimized parameters, the rejection rate was reduced from 16.98% to 6.07%.     

New approach to low thermal conductivity of thermal barrier protection with improved mechanical integrity

Layered ceramic systems with designed stacks of dense and porous layers were investigated as alternative for thermal barrier protection system (TBPs). This approach gives the possibility to obtain low thermal conductivity with the impact protection of dense external layers whilst maintaining the relatively high mechanical properties. Different stacking configurations have been proposed utilizing in total a combination of up to 30 dense/porous layers. Porous layers were produced with two different nominal porosities 20 vol% and 40 vol%. For comparison uni-axial pressed samples with the same porosity level have been prepared. Thermal and mechanical characterization was performed on samples of tape cast (with different stacking designs) and uni-axial pressed fully stabilized zirconia TBPs. The layered fully stabilized zirconia (8YSZ) has 15–30 % lower thermal conductivity in comparison with the uni-axial pressed samples, nevertheless by the same Young`s modulus value. The results of the thermal and mechanical observation shows, that such an approach can be beneficial as an alternative for future thermal barrier protection systems.     

三维地矿工程体视化技术

描述了体视化技术的主要过程。对地矿工程的两种数据，即离散的钻孔采样数据和连续的工程布置几何模型数据．分别通过插值处理和体素化处理形成三维规则体数据场。最后，通过对体视化的各种算法和地矿工程数据的特点进行了剖析，给出了一种改进的光线投射法，并结合某一铁矿山的情况进行了模型验证。