摘要
运用光学显微镜、扫描电镜、电子探针以及图像分析仪，分析了Ｓ、Ｓ－ＲＥ、Ｓ－Ｃａ－ＲＥ非调质塑料模具钢中易切削相的形貌、分布、组成及其对力学性能的影响。结果表明，经Ｃａ、ＲＥ处理的钢中，出现以ｍＣａＯ·ｎＡｌ２Ｏ３为核心的ＭｎＳ和ＣａＯ·Ａｌ２Ｏ３·ＴｉＮ·（Ｍｎ，Ｃａ）Ｓ·ＲＥ２Ｓ３组成的复合硫化物，多呈纺锤形，提高了钢的横向冲击韧性。
The free cutting phases in the S, S RE and S Ca RE system non quenching and tempering die steels for plastic moulding were analyzed by means of optical microscope, scanning electron microscope, electron probe microanalyser and quantimet. The shape, distribution, composition of free cutting phases and the influence of the phases on the mechanical properties of steels have been studied. The experimental results show that in the S Ca RE system FT steel MnS containing m CaO· n Al 2O 3 nucleus and CaO·Al 2O 3·TiN·(Mn, Ca)S·RE 2S 3 sulphide complex were observed. The sulphide in S Ca RE system steel is mostly spindle shaped so that the impact toughness in transverse section was improved. In addition, the shape of free cutting phases was improved as well in steels containing a proper amount of Al and microadding RE.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
1997年第6期23-27,共5页
Journal of Iron and Steel Research
基金
国家教委高等学校博士学科点专项科研基金
关键词
模具钢
易切削相
形貌
分布
组成
die steel,free cutting phase,shape,distribution,composition
