高级检索
徐连勇, 荆洪阳, 安俊超, 徐德录, 韩钰, 陈玉成. P92钢焊接接头蠕变本构关系[J]. 焊接学报, 2009, (12): 29-32.
引用本文: 徐连勇, 荆洪阳, 安俊超, 徐德录, 韩钰, 陈玉成. P92钢焊接接头蠕变本构关系[J]. 焊接学报, 2009, (12): 29-32.
shu
XU Lianyong, JING Hongyang, AN Junchao, XU Delu, HAN Yu, CHEN Yucheng. Creep constitutive equations of P92 steel welded joint[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2009, (12): 29-32.
Citation: XU Lianyong, JING Hongyang, AN Junchao, XU Delu, HAN Yu, CHEN Yucheng. Creep constitutive equations of P92 steel welded joint[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2009, (12): 29-32.
shu

P92钢焊接接头蠕变本构关系

Creep constitutive equations of P92 steel welded joint

    摘要
  • 摘要: 通过热处理方法模拟焊接热循环,在3.53 K/s的升温速度下制备P92钢焊接热影响区各微区的模拟组织试样,通过单轴蠕变试验获得923 K下P92钢熔敷金属、热影响区各微区和母材组织不同应力水平下的单轴蠕变数据,用最小二乘法拟合得到P92钢焊接接头各区域组织在稳态蠕变条件下的蠕变本构方程.结果表明,相比焊接接头其它微区组织,试验应力较低时,细晶区的蠕变应变率最大,因此在低应力下细晶区容易发生蠕变开裂;随着应力水平的增加,焊接接头和母材蠕变速率逐渐超过细晶区,蠕变断裂易发生在焊缝或母材上.

     

    Abstract: The welding heat thermal cycle was simulated through the heat treating method, and the simulated microstructures of the coarse grain heat-affected zone(CGHAZ), fine grain heat-affected zone(FGHAZ) and intercritical heat-affected zone(ICHAZ) of P92 steel were prepared by using a furnace at 3.53 K/s of heating rate.The uniaxial creep data of the base metal, deposited metal and simulated CGHAZ, FGHAZ and ICHAZ specimens were obtained through the creep tests under the temperature of 923 K, and the creep constitutive equations of each material were obtained too.The result shows that the creep strain rate of FGHAZ is higher than the other zones of the welded joint under the low stress.So the creep rupture is easy to occur in the FGHAZ.In addition, the creep properties are obviously different among the CGHAZ, FGHAZ and ICHAZ, which indicate the HAZ has the obvious material heterogeneity.

     

    • HTML全文
    • 参考文献(0)
    • 相关文章
    • 施引文献
  • 资源附件(0)

/

返回文章
返回