Effects of Forging and Heat Treatment on Microstructure and Properties of High Boron Cast Ferroalloy

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Effects of Forging and Heat Treatment on Microstructure and Properties of High Boron Cast Ferroalloy

更新时间：2025-07-09

- Effects of Forging and Heat Treatment on Microstructure and Properties of High Boron Cast Ferroalloy
- Vol. 44, Issue 8, Pages: 112-116+121(2010)
- 作者机构：
  
  西安交通大学金属材料强度国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TG142.72
- Online First：10 August 2010，
  
  Published：2010
- 稿件说明：
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Effects of Forging and Heat Treatment on Microstructure and Properties of High Boron Cast Ferroalloy[J]. 2010, 44(8): 112-116+121.
DOI：

Effects of Forging and Heat Treatment on Microstructure and Properties of High Boron Cast Ferroalloy[J]. 2010, 44(8): 112-116+121. DOI：

摘要

采用锻造+热处理复合工艺消除高硼铸造铁基合金中硼化物的连续网状分布

显著提高了合金的韧性.借助扫描电镜、透射电镜和X射线衍射仪等手段分析了锻造+热处理对高硼铸造铁基合金组织与性能的影响

结果表明:锻造使网状硼化物破断

获得了均匀分布在基体中的条块状硼化物

硼化物局部出现“颈缩”和亚晶界; 经热处理后

硼化物尖角圆整化

而存在“颈缩”部位和亚晶界的硼化物则断开和球化; 经锻造+热处理复合工艺处理后

合金的宏观硬度略有增加

由HRC 51.4增加到HRC 54.7

冲击韧性则大幅度提高

由5 J/cm

提高到107 J/cm

增加了约21倍

冲击断口由脆性断口转变为韧性断口.

Abstract

To eliminate the boride network in high boron cast ferroalloy

the combined process of forging with heat treatment is adopted. The prepared samples are analyzed by using scanning electron microscope

transmission electron microscopy

and X-ray diffraction. The results show that forging breaks up the boride network and leads to uniform distribution of boride in matrix. During subsequent heat treatment

spheroidized boride is able to be obtained. The hardness of the high boron cast ferroalloy treated with the combined process increases from HRC 51.4 to HRC 54.7

while the toughness increases evidently from 5 J/cm

to 107 J/cm

and the fracture morphology changes from brittle manner to toughness manner.

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references

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