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    • 2. 发明申请
    • NEW ALLOY AND METHOD FOR PRODUCING SAME
    • 新合金及其生产方法
    • WO01044530A1
    • 2001-06-21
    • PCT/SE2000/002550
    • 2000-12-15
    • C21C1/08C21C1/10C22C33/08C22C33/10C22C37/00C22C37/04C22C37/10
    • C22C37/04C21C1/08C21C1/10C22C33/10C22C37/00C22C37/10
    • It is possible to generate a desirable form (soft, pliable) of sulfide inclusions in magnesium-treated cast irons. Thermodynamically, MnS and MoS2 are not stable in the presence of magnesium. However, by adding magnesium to a cast iron melt containing manganese sulfide/molybdenium sulfide as late as possible, and preferably when the molten cast iron has been dispensed into the mould, such sulfide inclusions may be preserved in magnesium-treated cast irons. Alternatively, said cast iron can also be formed by adding said sulfides directly to the iron after the magnesium reaction has taken place and an in situ equilibrium has been established between magnesium, oxygen and sulfur. Another option is to begin with a sulfur content in excess of the stoichiometric amount required to combine with the added magnesium, thus ensureing an amount of left-over sulfur to promote the formation of the desired sulfide inclusions.
    • 可以在镁处理的铸铁中产生所需的硫化物夹杂物(柔软,柔韧)的形式。 在热力学上,MnS和MoS2在镁的存在下不稳定。 然而,通过将镁添加到含有硫化锰/硫化钼的铸铁熔体中,并且优选当将熔融铸铁分配到模具中时,可以在镁处理的铸铁中保存这种硫化物夹杂物。 或者,所述铸铁也可以通过在镁反应发生之后将所述硫化物直接添加到铁中并在镁,氧和硫之间建立原位平衡来形成。 另一个选择是开始硫含量超过与添加的镁组合所需的化学计量量,从而确保一定量的剩余硫以促进所需的硫化物夹杂物的形成。