大型铸锻件
大型鑄鍛件
대형주단건
Heavy Casting and Forging
2015年
6期
1-4,21
,共5页
Q345E%带状组织%终辗温度%芯辊进给速度
Q345E%帶狀組織%終輾溫度%芯輥進給速度
Q345E%대상조직%종전온도%심곤진급속도
Q345E%banded structure%final rolling temperature%feed speed of core roller
在终辗温度范围为800～920℃、芯辊进给速度为0．3 mm／s～1．0 mm／s工艺条件下对Q345E风电法兰辗环过程进行多组试验，并应用光学显微镜观察不同条件下的组织形态。研究表明，Q345E锻坯在进行辗扩变形时，适当降低终辗温度利于带状组织的减弱，在终辗温度为800℃时得到较为理想的金相组织。提高辗环机芯辊进给速度使铁素体晶粒细化从而得到均匀组织。
在終輾溫度範圍為800～920℃、芯輥進給速度為0．3 mm／s～1．0 mm／s工藝條件下對Q345E風電法蘭輾環過程進行多組試驗，併應用光學顯微鏡觀察不同條件下的組織形態。研究錶明，Q345E鍛坯在進行輾擴變形時，適噹降低終輾溫度利于帶狀組織的減弱，在終輾溫度為800℃時得到較為理想的金相組織。提高輾環機芯輥進給速度使鐵素體晶粒細化從而得到均勻組織。
재종전온도범위위800～920℃、심곤진급속도위0．3 mm／s～1．0 mm／s공예조건하대Q345E풍전법란전배과정진행다조시험，병응용광학현미경관찰불동조건하적조직형태。연구표명，Q345E단배재진행전확변형시，괄당강저종전온도리우대상조직적감약，재종전온도위800℃시득도교위이상적금상조직。제고전배궤심곤진급속도사철소체정립세화종이득도균균조직。
Under the technological conditions of 800~920℃final rolling temperature and 0.3 mm/s~1.0 mm/s feed speed of core roller, the multiple tests for ring rolling process of Q345E flange have been performed.Meanwhile, the morphology of microstructures of different conditions have been observed by adopting the optical microscope .It shows that during rolling deformation process , properly reducing the final rolling temperature for Q 345E forging stock can be good for weakening of banded structure .When the final rolling temperature is 800℃, the comparatively ideal metallographic structure could be obtained .By increasing the feed speed of core roller of ring rolling machine , the fer-rite grain size could be refined to obtain the uniform microstructure .
