Carburizing process utilizing atmospheres generated from
nitrogen-ethanol based mixtures
    4.
    发明授权
    Carburizing process utilizing atmospheres generated from nitrogen-ethanol based mixtures 失效
    渗碳过程利用由氮 - 乙醇基混合物产生的气氛

    公开(公告)号:US4317687A

    公开(公告)日:1982-03-02

    申请号:US148854

    申请日:1980-05-12

    CPC分类号: C23C8/32 C23C8/22

    摘要: A process for carburizing ferrous metal articles in a furnace under an atmosphere derived from an input of nitrogen and ethanol injected into the furnace during the entire cycle. Carburization is controlled in a first embodiment by the control of ethanol and nitrogen mixture and water vapor content of the mixture as well as total flow through the furnace and in a second embodiment by controlling the nitrogen-ethanol mixture to which is added water and an enriching or carburizing agent.

    摘要翻译: 在整个循环期间,在从炉内输入的氮气和乙醇输入的气氛下,在炉中渗碳黑色金属制品的方法。 通过控制混合物的乙醇和氮气混合物和水蒸汽含量以及通过炉的总流量来控制渗碳,并且在第二实施方案中通过控制添加有水的富氮的氮 - 乙醇混合物 或渗碳剂。

    Inhibited annealing of ferrous metals containing chromium
    9.
    发明授权
    Inhibited annealing of ferrous metals containing chromium 失效
    含铬金属的抑制退火

    公开(公告)号:US4334938A

    公开(公告)日:1982-06-15

    申请号:US180241

    申请日:1980-08-22

    CPC分类号: C21D1/76 C21D6/002

    摘要: A process for limiting the absorption of nitrogen by ferrous metal containing chromium as an alloying additive (e.g. stainless steel) during high temperature annealing in an atmosphere of nitrogen and hydrogen by controlled additions of an inhibitor selected from the group consisting of water vapor, oxygen, nitrous oxide, carbon dioxide or mixtures thereof to the atmosphere while controlling the dew point of the furnace atmosphere and/or the ratio of the partial pressure of the inhibitor to the partial pressure of the hydrogen.

    摘要翻译: 在氮气和氢气气氛中通过控制加入选自下列的抑制剂来限制在高温退火过程中含铬的含铁金属作为合金添加剂(例如不锈钢)的氮的吸收的方法,所述抑制剂选自水蒸气,氧气, 一氧化二氮,二氧化碳或其混合物,同时控制炉内气氛的露点和/或抑制剂的分压与氢分压的比例。