甘肃冶金
甘肅冶金
감숙야금
GANSU METALLURGY
2015年
3期
30-32
,共3页
田桂茹%赵友虎%刘振%朱坤学%高龙永%陈传磊
田桂茹%趙友虎%劉振%硃坤學%高龍永%陳傳磊
전계여%조우호%류진%주곤학%고룡영%진전뢰
连铸坯%高温力学性能%断面收缩率
連鑄坯%高溫力學性能%斷麵收縮率
련주배%고온역학성능%단면수축솔
continuous casting slab%high temperature mechanical properties%contraction of cross sectional area
采用Gleeble-1500模拟试验机，研究了Q345系列低合金连铸坯的高温力学性能。结果表明：第I脆性温度区大于1250℃，其在900～1250℃时断面收缩率为95％～83％，具有良好的高温塑性；第Ⅲ脆性温度区约为720～850℃，其断面收缩率最低为58％左右。为预防铸坯矫直过程裂纹产生，要控制矫直温度在900℃以上。
採用Gleeble-1500模擬試驗機，研究瞭Q345繫列低閤金連鑄坯的高溫力學性能。結果錶明：第I脆性溫度區大于1250℃，其在900～1250℃時斷麵收縮率為95％～83％，具有良好的高溫塑性；第Ⅲ脆性溫度區約為720～850℃，其斷麵收縮率最低為58％左右。為預防鑄坯矯直過程裂紋產生，要控製矯直溫度在900℃以上。
채용Gleeble-1500모의시험궤，연구료Q345계렬저합금련주배적고온역학성능。결과표명：제I취성온도구대우1250℃，기재900～1250℃시단면수축솔위95％～83％，구유량호적고온소성；제Ⅲ취성온도구약위720～850℃，기단면수축솔최저위58％좌우。위예방주배교직과정렬문산생，요공제교직온도재900℃이상。
The high temperature mechanical properties of Q 345 lowa-lloy steel were investigated by using Gleeble -1500 hot simulator.The results showed that the brittleness temperature range I of Q 345 low-alloy steel was over 1250℃.In the range of 900~1250 ℃,the slab has a reduction of area about 95%~83%with good high-temperature plasticity.The brittleness temperature rangeⅢof the specimen was 720~850 ℃ with its minimum reduction of area about 58%.In order to prevent cracking during straightening ,the straightening temperature for the slabs should be controlled over 900℃.
