Hongying GONG
,
Wei ZHU
,
Zhiliang ZHANG
,
Zhenliang LOU
材料科学技术（英文）
A probe test method was employed to detect the friction condition of the interfaces between tools and blank. At the same time a self-developed measurement apparatus to realize the probe test method was also presented. Based on the analysis of force, a correlative friction model was also given. With the self-developed measurement apparatus, the effects of three kinds of lubricating oils which were in common use during the process of sheet steel drawing were studied. By probing the friction coefficient values of different lubricating oils during the drawing process of the hot-galvanized sheet steel (steel brand: ST07Zn), we can see that the friction caused by PK oil was the lowest, so the effect of PK oil was the best. Then PK oil was used as the base lubricating oil and some solid additive powers was added into it to make a new type lubrication (named as L oil).The result of test proved that the new lubricating oil had remarkable effect on the drawing process of hot-galvanized sheet steel.
关键词:
Drawing process
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汪文云
,
张朝晖
黄金
doi:10.3969/j.issn.1001-1277.2008.06.003
通过对贵州水银洞卡林型金矿苔藓植物野外全面调查,发现贵州水银洞金矿共有苔藓植物15科42属102种,其中苔类植物4科4属5种,藓类植物10科37属96种,角苔类植物1科1属1种. 短柄小曲尾藓Dicranella gonoi Card.、纤毛丝瓜藓Pohlia hisaet. Kop et J.S.Lou、纤枝短月藓Brachymenium exile (Doz.et.Molk) Bosch et Lac.、真藓Bryum argenteum Hedw.为该矿区裸地大量生长的种类,可利用它们作为金属矿山生态恢复进一步研究的素材.通过与露天开采的金矿区苔藓植物丰富度比较,埋藏型金矿区的苔藓植物较露天开采的金矿区的丰富.该区苔藓植物区系地理成分共9种,世界广布和中国特有分布占主要优势(各22种,都占21.57%),其次是东亚成分(共17种,都占16.67%),再次为热带亚洲成分(共16种,都占15.69%).
关键词:
苔藓植物
,
丰富度指数
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区系
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水银洞卡林型金矿
