谐波减速器柔轮与柔性轴承断裂失效分析

通过观察显微组织、测定力学性能以及观察断口形貌，对比分析国产失效谐波减速器和日本谐波减速器关重件柔轮和柔性轴承的显微组织和力学性能，并分析了国产谐波减速器过早失效的原因。结果表明，失效谐波减速器柔轮显微组织与日本相同，均为回火屈氏体，失效柔轮平均晶粒尺寸为8.2 μm，比日本柔轮平均晶粒尺寸高了1.5 μm；失效柔性轴承和日本柔性轴承显微组织均为回火马氏体，失效柔性轴承平均晶粒尺寸为13.1 μm，比日本柔性轴承平均晶粒尺寸高出6.9 μm。失效谐波减速器柔轮断口呈脆性断裂，无明显裂纹源，但失效的柔性轴承断口存在明显断裂走向，在裂纹源中有大尺寸、聚集性分布的夹杂物。失效轴承钢质洁净度差，存在大尺寸夹杂物，且显微组织晶粒粗大，阻碍裂纹扩展的能力差，导致国产谐波减速器过早失效

附着基生态的鲫鱼池塘养殖方法

本发明公开了一种附着基生态的鲫鱼池塘养殖方法，涉及水产养殖技术领域。本方法是：①构建附着基生态的鲫鱼池塘养殖系统：A、池塘准备；B、附着基设置；C、池塘套养群体组成；②鲫鱼放养；③养殖管理；④捕捞渔产品。与传统养殖模式相比，本发明利用几种养殖鱼类的生活习性，并在池塘中设置附着基，成功构建了一种附着基生态的鲫鱼池塘养殖系统，有效控制了高密度养殖造成的水质恶化问题，鲫鱼发病少；附着基提供套养鱼附着基食物，降低成本，同时套养鱼类生产渔产品也可增加收益；生态养殖模式更加绿色健康，鲫鱼和细鳞斜颌鲴的品质高。</p

基于环烯烃共聚物的阴离子交换膜的合成及性能研究

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大豆油返酸、返色影响因素分析Impact factors of acid reversion and color reversion of soybean oil

为对大豆油适度精炼和精准加工提供参考，对精炼生产过程中不同工序大豆油的返酸、返色程度以及一级大豆油中磷脂、残皂、不皂化物等组分对其返酸、返色程度的影响进行分析。结果表明：大豆原油返酸和返色程度均最高，中和油最低；磷脂含量越高，大豆油返酸、返色程度越深；不皂化物含量越高，越有助于延缓大豆油返酸、返色；含皂量对大豆油返酸影响不显著，但会影响大豆油返色。综上，在大豆油生产中应控制磷脂含量和含皂量，减少不皂化物的损失，以延缓大豆油返酸、返色。 In order to provide reference for moderate refining and precise processing of soybean oil, the degree of acid reversion and color reversion of soybean oil in different processes during refining production and the influence of phospholipids, soap, unsaponifiables in first grade soybean oil on the degree of acid reversion and color reversion were analyzed. The results showed that the crude soybean oil had the highest acid reversion and color reversion, while neutral oil had the lowest. The higher the phospholipid content in soybean oil, the deeper the acid reversion and color reversion of soybean oil. The higher the content of unsaponifiables, the more beneficial to delay the acid reversion and color reversion of soybean oil. The content of soap had no significant effect on the acid reversion of soybean oil, but it affected the color reversion of soybean oil. In conclusion, during the production of soybean oil, the content of phospholipid and soap should be controlled and the loss of unsaponifiables should be reduced in order to delay the acid reversion and color reversion of soybean oil