摘要
采用金相显微镜、扫描电镜和能谱仪对无缝钢管中非金属夹杂物的类型、形态和化学组成进行了大量的分析研究。结果表明:锰钢和铬钼无缝钢管中A类浅灰色细条状夹杂物的化学组成主要是硫化锰,部分是硫化锰+氧化物、硫化锰+氮化物的复合夹杂;B类深灰色链条状夹杂物的化学组成主要是铝酸钙,部分是铝酸钙+颗粒氧化物;C类黑灰色条状夹杂物的化学组成主要是硅酸锰,部分是硅酸锰铁+硫化锰;D类和DS类黑灰色球形夹杂物的化学组成主要是硅铝酸钙和镁铝尖晶石的复合氧化物。除上述五类夹杂物外,非传统类球形夹杂物主要是心部硅铝酸钙外裹硫化钙的复合夹杂,部分是球形硫化钙。在微合金化(添加V、Nb、Ti)钢管中,还有桔红色氮化物、浅红色碳氮化物或灰白色碳化物。确定目标夹杂物的特性,能够为产品研发和工艺研究提供技术支持。另外,本文还论述了夹杂物的来源、形成机理以及对钢管性能的危害。
Massive analysis and studies are conducted on the types, morphologies and chemical compositions of inclusions in seamless pipes with LM, SEM and EDS. The results indicate that in the seamless pipes of manganese and chrome molybdenum steel, type A inclusions, which are strips in light gray color, are composed of most manganese sulfides and some composite inclusions, i.e. manganese sulfides and oxides, manganese sulfides and nitrides, and type B, which are dark gray inclusions in chains, are composed of most calcium aluminates and some composite inclusions of calcium aluminates and granular oxides, and type C inclusions, which are black grey strips, are composed of manganese silicates, and some iron manganese silicates and manganese sulfides, and type D and DS, which are globular inclusions in black gray color, are mainly composite inclusions of calcium aluminosilicate and magnesia alumina spinel. Besides the five types of inclusions mentioned above, non-traditional globular inclusions are mainly composite inclusions of calcium aluminosilicate in the center and calcium sulfides covered outsides, and some calcium sulfides. In microalloy steel pipes （such as the pipe added V, Nb, Ti）, there are also some precipitated phases of tangerine nitrides, light red carbonitrides or offwhite carbides. It was found that synthetical characterization of target inclusion could supply significant support for improving the performance of product and optimizing the production processes. Moreover, the origins, formation mechanism and hazards of inclusions are also discussed in this article.
出处
《冶金分析》
CAS
CSCD
北大核心
2012年第10期21-29,共9页
Metallurgical Analysis
