摘要
HG70钢是一种高强度低合金机械工程用钢。本文研究了焊缝中扩散氢含量与预热温度的关系。通过焊接热影响区最高硬度试验、小铁研试验 ,评估了HG70钢的裂纹敏感性 ,测定了手工焊接接头的力学性能。结果表明 ,HG70钢具有较低的裂纹敏感性 。
WT5”BZ]HG70 steel is a high strength and low carbon steel for mechanical engineering use. In this paper, the influence of pre heating temperature on the content of diffusive hydrogen in weld joint was studied. The hardness test in heat affected zone and Y groove cracking test are carried out to evaluate cracking sensitivity of this steel. The mechanical properties of welded joint are also examined. The results show that HG70 has low sensitivity to cracking and the welded joint of HG70 steel exhibits good mechanical properties. [WT5”HZ]
出处
《材料开发与应用》
CAS
2001年第4期19-23,共5页
Development and Application of Materials
