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    • 6. 发明申请
    • PROCESS FOR PRODUCING HIGH-STRENGTH SINTERED PARTS FROM POWDERED STEEL
    • 由粉末钢生产高强度烧结部件的方法
    • WO1991010754A2
    • 1991-07-25
    • PCT/DE1991000041
    • 1991-01-17
    • MANNESMANN AGDAUTZENBERG, NorbertDORWEILER, Heinz, JosefLINDNER, Karl-Heinz
    • MANNESMANN AG
    • C22C33/02
    • C22C33/0264C22C33/02
    • In a process for producing high-strength sintered parts, a water-atomized and reduction-annealed powdered steel mixed with 0.3 to 0.7 wt.% of graphite powder is compressed in a mould to form compacts, which are then sintered at a temperature between 1120 and 1280 °C, cooled, hardened and annealed. In order to obtain a process for producing high-strength sintered parts which can nevertheless be hardened without being quenched in an oil bath, the powdered steel has the following composition: 0.02 % C, not more than 0.03 % Si, 0.05 - 0.25 % Mn, 2.5 - 5.0 % Ni, 0.2 - 1.5 % Mo, the remainder being iron and usual impurities; the compacts are compressed to at least 6.9 g/cm3; the compacts are cooled from the sintering temperature under a gas shower arranged in the cooling zone of the sintering furnace; and the final annealing is carried out at temperatures between 180 and 500 °C for 30 to 90 minutes.
    • 本发明涉及一种高强度烧结部件的制造方法,其中将混合有0.3〜0.7重量%的石墨粉末并用水雾化并退火还原的钢粉末 将得到的压制片在1120℃至1280℃的温度下烧结,然后冷却骤冷,最后进行回火。 为了表示生产高强度烧结部件的方法,其不需要浸入油浴中以硬化,建议将下列组成提供给钢囊 - 最大 。 0.02%C,max。 0.03%的Si,0.05-0.25%的Mn,2.5-5.0%的Ni,0.2-1.5%的Mo-余量的铁和常用杂质,以将产物压缩成 压力至少为6.9g / cm 3,通过在烧结炉的冷却区中的气浴将其冷却,从烧结温度开始,并且在一定温度下进行最终操作 在180°和500°之间进行30到90分钟的时间。