已入深夜,您辛苦了!由于当前在线用户较少,发布求助请尽量完整的填写文献信息,科研通机器人24小时在线,伴您度过漫漫科研夜!祝你早点完成任务,早点休息,好梦!

Effect of Cooling Rate on Microstructure Evolution and Mechanical Properties of SCM435 Steel

微观结构 材料科学 复合材料 冶金
作者
Jilin Chen,Guanghong Feng,Yaxu Zheng,Peng Lin,Lijun Wang,Yongchao Li
出处
期刊:Metals [Multidisciplinary Digital Publishing Institute]
卷期号:14 (2): 140-140 被引量:1
标识
DOI:10.3390/met14020140
摘要

The microstructural evolution of SCM435 cold heading steel at different cooling rates was investigated by means of scanning electron microscopy, TEM, XRD, and electron backscatter diffraction. The results show that the cooling rate has a significant effect on the microstructure of the experimental steel. With an acceleration in the cooling, the microstructure of the steel gradually changed from ferrite and pearlite to ferrite, pearlite, and granular bainite; finally, the pearlite disappeared, and the microstructure changed to acicular ferrite, bainite, and martensite. With an increase in the cooling rate, the morphology of the carbide underwent an evolution from sheet carbide to short-rod carbide, granular carbide, and ultimately thin-strip carbide. With the acceleration in cooling, the proportion of large-angle grain boundaries gradually decreased, and the area of small-angle grain boundaries gradually increased. When the cooling rate was 0.1 °C/s, the proportion of large-angle grain boundaries was as high as 52.8%, and the dislocation density was only 1.91 × 1012 cm−2. When the cooling rate was 2.0 °C/s, the proportion of large-angle grain boundaries was only 27.1%, and the dislocation density increased to 5.38 × 1012 cm−2. With the increase in the cooling rate, the depth of the decarbonization layer and the thickness of the scale oxide gradually decreased, the proportion of the FeO phase in the scale phase gradually decreased, and the proportion of the Fe3O4 phase and Fe2O3 phase gradually increased. The tensile strength increased monotonously with the increase in cooling rate, whereas the elongation and area reduction first decreased, then increased, and then decreased. When the cooling rate was 1.0 m/s, the short rod and granular bainite in the material structure endowed the SCM435 steel with excellent strength and toughness matching, and the tensile strength and elongation of the steel reached 895 MPa and 24%, respectively.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
刚刚
孤独尔白应助二枫忆桑采纳,获得10
刚刚
1秒前
HuLL完成签到 ,获得积分10
5秒前
好事发生666完成签到,获得积分10
6秒前
yang完成签到,获得积分10
7秒前
7秒前
科研通AI5应助灵巧的尔芙采纳,获得10
7秒前
7秒前
斜玉完成签到,获得积分10
8秒前
sy发布了新的文献求助10
12秒前
阔达鸿涛发布了新的文献求助10
13秒前
16秒前
月色真美完成签到,获得积分20
18秒前
骆凤灵完成签到 ,获得积分10
19秒前
兔兔完成签到,获得积分10
19秒前
XX发布了新的文献求助10
20秒前
m1nt完成签到,获得积分0
22秒前
orixero应助科研通管家采纳,获得30
23秒前
脑洞疼应助科研通管家采纳,获得10
23秒前
孤独尔白应助科研通管家采纳,获得10
23秒前
科研通AI2S应助科研通管家采纳,获得10
23秒前
25秒前
neechine完成签到 ,获得积分10
26秒前
慕青应助独特的小吴采纳,获得30
27秒前
32秒前
KHZhang完成签到,获得积分10
33秒前
幸运幸福完成签到,获得积分10
37秒前
无花果应助月色真美采纳,获得30
38秒前
默默碧空发布了新的文献求助10
38秒前
缓慢的灵枫完成签到 ,获得积分10
38秒前
烟花应助KHZhang采纳,获得10
39秒前
兔兔发布了新的文献求助10
40秒前
可爱的函函应助大马哈鱼采纳,获得10
41秒前
45秒前
爱学习的小白完成签到 ,获得积分10
47秒前
55秒前
56秒前
56秒前
名金学南完成签到,获得积分10
57秒前
高分求助中
Technologies supporting mass customization of apparel: A pilot project 600
Introduction to Strong Mixing Conditions Volumes 1-3 500
Tip60 complex regulates eggshell formation and oviposition in the white-backed planthopper, providing effective targets for pest control 400
A Field Guide to the Amphibians and Reptiles of Madagascar - Frank Glaw and Miguel Vences - 3rd Edition 400
China Gadabouts: New Frontiers of Humanitarian Nursing, 1941–51 400
The Healthy Socialist Life in Maoist China, 1949–1980 400
Walking a Tightrope: Memories of Wu Jieping, Personal Physician to China's Leaders 400
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 物理 生物化学 纳米技术 计算机科学 化学工程 内科学 复合材料 物理化学 电极 遗传学 量子力学 基因 冶金 催化作用
热门帖子
关注 科研通微信公众号,转发送积分 3798374
求助须知:如何正确求助?哪些是违规求助? 3343792
关于积分的说明 10317687
捐赠科研通 3060529
什么是DOI,文献DOI怎么找? 1679576
邀请新用户注册赠送积分活动 806729
科研通“疑难数据库(出版商)”最低求助积分说明 763296