Copper containing sulphide phases present in controlled rolled niobium–titanium bearing high strength low alloy steels
Copper containing sulphide phases present in controlled rolled niobium–titanium bearing high strength low alloy steels
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受控轧制铌钛轴承高强度低合金钢中存在含铜硫化物相
DOI：
10.1179/mst.1992.8.12.1082
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发表时间：
1992
影响因子：
1.8
通讯作者：
T. N. Baker
中科院分区：
文献类型：
--
作者：
Kejian He;T. N. Baker
在控轧含铌高强度低合金钢中首次观察到了复杂的含铜硫化物相。对这些含铜硫化物进行了分析电子显微镜研究。观测结果表明，在许多情况下，这些颗粒具有双重尺寸，并且是多相的。较小的颗粒直径为0.2至0.7 μm，具有圆形或椭圆形盘状形态，主要存在于靠近珠光体带和/或珠光体带内，其中合金元素的偏析严重;它们往往与其他沉淀物如硫化锰和含钛添加剂的钢中的碳氮化钛有关。较大的颗粒（>1 μm）偶尔出现，通常与尖晶石MgO、Al 2 O3和/或Al 2 O3、Ti（C，N）、MnS和二氧化硅有关。这些颗粒具有复杂的化学组成，（Cu + Mn）/S比值在0.77 ~ 1.42之间;它们的电子衍射图案导致晶格参数非常接近于铜蓝（CuS）或蓝辉铜矿的晶格参数（Cu_（1·765）S ~ Cu_（1·79）S），颗粒可能是不同物相的复合物，如铜蓝相和硫化锰或蓝辉铜矿，铜蓝相和硫化锰。一些观察到的硫化锰颗粒还含有少量的铜。随着铜和硫在铸态下的偏析，以及在更强的硫化物形成元素如锰的存在下，随着温度降低，可能发生含铜硫化物络合物的形成。MST/1603
Complex copper bearing sulphide phases have been observed for the first time in controlled rolled niobium bearing high strength low alloy steels. Analytical electron microscopy studies were carried out on these copper bearing sulphides. The observations show that, in many cases, these particles have duplex sizes and are multiphase. The smaller particles have diameters from 0·2 to 0·7 μm with round or ellipsoidal disclike morphology, mainly present close to and/or within the pearlite banding where the segregation of the alloying elements is severe; they tend to be associated with other precipitates such as manganese sulphide, and titanium carbonitrides in the steels having titanium additions. The larger particles (>1 μm) occur occasionally, and are often associated with spinel MgO.Al2O3 and/or A12O3, Ti(C,N), MnS, and silica. These particles have complex chemical compositions with a ratio of (Cu + Mn)/S ranging from 0·77 to 1·42; their electron diffraction patterns lead to lattice parameters which are very close to either that of covellite (CuS) or digenite (Cu1·765S to Cu1·79S), The particles are probably the complexes of different phases, such as covellite phases and manganese sulphide, or digenite, covellite phases, and manganese sulphide. Some of the observed manganese sulphide particles also contain a small percentage of copper. With segregation of copper and sulphur in the as cast state, and in the presence of more strongly sulphide forming elements, such as manganese, the formation of copper bearing sulphide complexes can occur as the temperature decreases. MST/1603