Sulphide and Its Effect on Solidification Cracking in Weld Metal of Steel (Report 1)
Sulphide and Its Effect on Solidification Cracking in Weld Metal of Steel (Report 1)
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硫化物及其对钢焊缝金属凝固裂纹的影响（报告1）
DOI：
10.2207/qjjws1943.42.1073
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发表时间：
1973
期刊：
影响因子：
--
通讯作者：
H. Nakagawa
中科院分区：
文献类型：
--
作者：
T. Senda;F. Matsuda;H. Nakagawa
研究了Fe-S-Mn-Ni和Fe-S-Mn-C四元合金TIG焊焊缝金属中硫化物的行为和凝固裂纹敏感性。在这些合金中，硫的含量有意地略高于商业钢中的硫含量。得到的主要结论如下：1）添加2-（？）7%的镍或0.2%的碳添加到含1%锰和0.0480.086%硫的焊缝金属中，不仅导致柱状晶界处膜状硫化物（MnS）的形成，而且降低了硫化物形成的共晶温度。锰含量的增加可达2- 10%。2）用Trans-Varestraint试验评价了合金的凝固裂纹敏感性，结果表明，当锰含量为1%时，随着镍或碳含量的增加，合金的凝固裂纹敏感性增加。当锰含量增加到3%时，其敏感性降低程度与Mn ~（3/S）大于6.7的Fe-S-Mn三元合金相同。3）在Fe-S-Mn-Ni和Fc-S-Mn-C合金中，为防止硫的有害作用，锰和硫含量之间存在着普遍的关系，即：凝固裂纹敏感性相对降低的关系如下所示; Mn_5/S>310- 560此外，磁化率降低到与Mn_3/S> 6.7的Fe-S-Mn合金相同程度的关系如下：Mn_5/S=2500-3600
Behaviour of sulphide and solidification crack susceptibility in TIG-arc weld metals of Fe-S-Mn-Niand Fe-S-Mn-C quarternary alloys have been investigated. In these alloys the sulphur contents were purposefully somewhat higher than those encountered in commercial steels. Main conclusions obtained are as follows:1) The addition of 2-..7% nickel or 0.2% carbon to the weld metals containing 1% manganese and 0.0480.086% sulphur not only causes the formation of filmlike sulphides (MnS) at the columnar grain boundaries, but also lowers the eutectic temperature at which the sulphides are formed. The increase in manganese content up to 2-..3%, however, prevents the formation of filmlike sulphides, and raise the eutectic temperature.2) The solidification crack susceptibility, which is evaluated with Trans-Varestraint test, is increased at 1 % manganese level with the increase in nickel or carbon content. The increase in manganese content up to 3%, however, lowers the susceptibility to the same degree as that of Fe-S-Mn ternary alloy whose Mn3/S is larger than 6.7.3)The general relationship between manganese and sulphur contents to prevent the detrimental effect of sulphur in Fe-S-Mn-NiandFc.S-Mn-Calloys is expected.That is, the relationship in which the solidification crack susceptibility is comparatively lowered is given as follows;Mn5/S>310-560Moreover, the relationship in which the susceptibility is lowered to the same degree as that of Fe-S-Mnalloy whose Mn3/Sis larger than6.7 is given as follows;Mn5/S=2500-3600