钢铁
鋼鐵
강철
IRON & STEEL
2015年
4期
53-57
,共5页
陶红标%张慧%范倚%王明林%马忠伟%赵沛
陶紅標%張慧%範倚%王明林%馬忠偉%趙沛
도홍표%장혜%범의%왕명림%마충위%조패
0.1％C-5％Mn钢%内部裂纹%马氏体%缓冷%热送
0.1％C-5％Mn鋼%內部裂紋%馬氏體%緩冷%熱送
0.1％C-5％Mn강%내부렬문%마씨체%완랭%열송
0.1％C-5％Mn steel%internal crack%martensite%soft cooling%hot charging
为了揭示0.1%C-5%Mn钢的板坯内部裂纹的产生机理，采用物理测试、金相分析和设计热模拟试验等方法，研究了不同冷却模式下钢的组织及裂纹特征。结果表明，高的冷却强度下铸坯内部出现了大量的马氏体和裂纹，冷却强度越大马氏体相越多，裂纹宽度越大。采用缓冷或热送的工艺能够防止快速冷却引起的马氏体相变，形成粒状贝氏体组织，由此可以控制内部裂纹的产生和扩展。
為瞭揭示0.1%C-5%Mn鋼的闆坯內部裂紋的產生機理，採用物理測試、金相分析和設計熱模擬試驗等方法，研究瞭不同冷卻模式下鋼的組織及裂紋特徵。結果錶明，高的冷卻彊度下鑄坯內部齣現瞭大量的馬氏體和裂紋，冷卻彊度越大馬氏體相越多，裂紋寬度越大。採用緩冷或熱送的工藝能夠防止快速冷卻引起的馬氏體相變，形成粒狀貝氏體組織，由此可以控製內部裂紋的產生和擴展。
위료게시0.1%C-5%Mn강적판배내부렬문적산생궤리，채용물리측시、금상분석화설계열모의시험등방법，연구료불동냉각모식하강적조직급렬문특정。결과표명，고적냉각강도하주배내부출현료대량적마씨체화렬문，냉각강도월대마씨체상월다，렬문관도월대。채용완랭혹열송적공예능구방지쾌속냉각인기적마씨체상변，형성립상패씨체조직，유차가이공제내부렬문적산생화확전。
In order to reveal formation mechanism of slab internal crack of the 0.1%C-5%Mn steel,structure and crack feature of this steel have been researched under different cooling models by using methods such as physical test,metallo-graphic examination etc and designing heat simulation experiment. The results show that a lot of martensite and crack ap-peared in the slab when the cooling intensity was high.The higher the cooling intensity,the more martensite phase had and the greater the crack width. By using soft cooling or hot charging process,the martensite transformation caused by rapid cooling could be prevented and granular bainite structure could be formed,which could control appearance and ex-tension of the internal crack.
