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2. 发明授权

US3836359A Method of producing leaded steel 失效
标题翻译：生产铅钢的方法
公开(公告)号：US3836359A
公开(公告)日：1974-09-17
申请号：US26401272
申请日：1972-06-19
申请人： REPUBLIC STEEL CORP
发明人： THOMAS J , GRIFFITH C
IPC分类号： C21C7/00 , C22C38/60 , C22C33/00
CPC分类号： C21C7/00 , C22C38/60
摘要： High lead content of uniformly dispersed finely divided particles is obtained in cast steel through a programmed addition of lead to molten steel in a vessel and control of other process factors, such as temperature, agitation and slag cover, affecting dissolution and retention of lead in molten steel. In the addition of lead, an initial quantity is introduced to the steel, large with respect to the time during which it is added as compared with the total lead added relative to the total time span of lead addition, and subsequently additional led is added, the total sufficient to produce a lead content in the steel greater than 0.15 percent by weight and no greater than 0.26 percent by weight. Preferably the total lead is introduced as three to five discrete additions at time intervals of one to fifteen minutes.
摘要翻译：在铸钢中通过程序性地将铅加入容器中的钢水并控制其它工艺因素，例如温度，搅拌和熔渣覆盖物，从而获得均匀分散的细碎颗粒的高铅含量，从而影响铅在熔融中的溶解和保留钢。在铅的添加中，引入钢的初始量相对于添加铅的时间相对于铅添加的总时间长度而言较大，并且随后添加另外的引线，足以使钢中的铅含量大于0.15重量％且不大于0.26重量％。优选地，总铅以1至15分钟的时间间隔引入3至5个离散添加。

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