水平连铸高镍铸铁棒材的微观组织与性能

刘越; 任洪峰; 杜玉柱; 余建峰

doi:10.15980/j.tzzz.2016.12.019

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水平连铸高镍铸铁棒材的微观组织与性能
Microstructure and Properties of High Nickel Cast Iron Rod by Horizontal Continuous Casting
2016年36卷第12期页码：1309-1312
纸质出版日期： 2016 ，
DOI： 10.15980/j.tzzz.2016.12.019

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[1]刘越,任洪峰,杜玉柱,余建峰.水平连铸高镍铸铁棒材的微观组织与性能[J].特种铸造及有色合金,2016,36(12):1309-1312.

Liu Yue, Ren Hongfeng, Du Yuzhu, et al. Microstructure and Properties of High Nickel Cast Iron Rod by Horizontal Continuous Casting[J]. Special Casting & Nonferrous Alloys, 2016,36(12):1309-1312.
[1]刘越,任洪峰,杜玉柱,余建峰.水平连铸高镍铸铁棒材的微观组织与性能[J].特种铸造及有色合金,2016,36(12):1309-1312. DOI： 10.15980/j.tzzz.2016.12.019.

Liu Yue, Ren Hongfeng, Du Yuzhu, et al. Microstructure and Properties of High Nickel Cast Iron Rod by Horizontal Continuous Casting[J]. Special Casting & Nonferrous Alloys, 2016,36(12):1309-1312. DOI： 10.15980/j.tzzz.2016.12.019.

摘要

采用水平连铸工艺制备了直径为54mm的高镍铸铁棒材

研究了棒材截面不同位置的微观组织形成机制和力学性能。结果表明

从棒材边缘向内3/5半径处范围内的组织（棒材外部）为D型石墨区

奥氏体晶粒呈树枝状

晶粒细小

一次枝晶发达

二次枝晶短小。棒材的3/5半径处到棒材轴心范围内的组织（棒材心部）为D型石墨+少量的E型石墨混合区

奥氏体晶粒呈树枝状

晶粒粗大

部分晶粒的二次枝晶较为发达。棒材中含有1.0%

.3%的合金碳化物。高镍铸铁棒材的抗拉强度为247

73 MPa

硬度（HB）为142

52。

Abstract

High nickel cast iron rods with 54 mm in diameter were produced by horizontal continuous casting.The formation mechanism of microstructure and mechanical properties of the cast iron at varied locations were investigated.The results show that the graphite in high nickel cast iron rods from the edge to the 3R/5is D-type graphite zone

and morphology of austenite grain exhibits the developed fine dendrite.The graphite in high nickel cast iron rods from the 3R/5to the axis are D-type graphite and a small amount of the E-type graphite.Morphology of austenite grain is coarse dendrite.There exists a little carbide about 1.0%

.3%in the bar.Tensile strength and hardness of the high nickel cast iron rods reach 247

273 MPa and 142to152 HB

respectively.