The Use of Sheepskin Covers on Vehicle Seats

Driver preference for sheepskin car seat covers has been compared with their preference for other types of car seat overlays by the pair comparison method. The trials were carried out by professional drivers in several types of motor cars and trucks. Overlays were found to improve the comfort of motor car and truck seats. Woolled sheepskins were more comfortable in a popular motor car and in trucks than the other types of overlay tested. In an expensive car with more luxurious seating however they did not add to the comfort of the seat.     

宝钢不锈带钢酸洗工艺及废水处理

以宝钢为例,对不同材质的热、冷轧不锈钢带钢提出酸洗工艺流程和设计参数,概述不锈钢各种酸洗方法的酸洗机理,介绍不锈钢酸洗后的废水处理方法。     

Microstructure and Properties of Hot Working Die Steel H13MOD

Compared with H13 steel, the influences of different heat treatment process on the microstructure and properties of the new type of hot working die steel H13MOD were studied. The results show that the complete austenitizing temperature of H13MOD is around 1030 °C and the quenching hardness achieves the maximum value at this temperature. While for H13, the complete austenitizing temperature is above 1100 °C and the quenching hardness rise constantly with the quenching temperature increasing. In quenching process, the undissolved MC carbides can prevent the coarsening of grain in both steels. With the rise of quenching temperature, when MC carbides dissolve completely, the grain grows quickly. The hardness and strength of H13MOD at higher tempering temperature (above 570 °C) are nearly the same as those of H13, but its toughness is higher than that of H13. Mo₂ C carbide is the main strengthening phase in H13MOD, which is attributed to the higher content of Mo. The quantity of VC eutectic carbides is reduced because of lower content of V in H13MOD, which plays an important role in enhancing the impact toughness of H13MOD. Under a certain strength condition, H13MOD steel can be used in the environment that higher toughness is required and the service life of die casting mold can be improved.     

Study on the Possibility of Using ZnO to Increase the Desulfurization Potential of Blast Furnace Slag and Sulfide Capacities

Zinc oxide has recently been suggested to be a potential material for hot metal desulfurization. The present work was carried out to examine whether ZnO could help the remaining blast furnace (BF) slag to capture sulfur. For this purpose, slags prepared with relatively high ZnO content was equilibrated with either liquid silver or liquid copper under controlled oxygen potential at 1773 K. It was found that most of the ZnO escaped during the experiment, indicating thereby that ZnO could not increase the desulfurization potential of the BF slag in the case of hot metal. The experimental data were used to evaluate the sulfide capacities of the studied slags. In some of the slags equilibrated with silver, the MgO activities were evaluated.     

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阐述了某热轧检验室承担的任务、工艺流程以及工艺布置,总结了热轧检验室设计中值得注意的问题及细节,并介绍了先进技术的应用,对同类工程的实验室建设与设计具有借鉴和参考作用。     

Chemical Biology Towards Precision Medicine

Organic chemistry is primed to fill a much-needed gap in our understanding of human biology and disease on the one hand and our ability to treat disease effectively on the other. The key challenge is to discover compounds having the novel mechanisms of action demanded by these new patient-derived insights.     

辊系装配密封性试验及精度控制

在大型热矫正机装配过程中,作为矫正机核心部件的辊系部分由于辊系本身的质量问题造成停机事故时有发生,给用户造成很大的经济损失,因此提高辊系装配的密封性及精度控制势在必行。     

H13模具钢的锻造及热处理简

简要介绍了H13模具钢的性能特点及应用概况，重点讨论了它的锻造要点和热处理工艺特点，分析了H13热锻模寿命不长、频繁失效的原因，并提出了纠正和预防措施。