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一、绪言 在含硫化氢的湿润环境中,已知有两种开裂。这两种开裂的模式图示于图1。其一叫做硫化物应力腐蚀开裂(SSCC:Sulfide Stress Corrosion Cracking)或硫化物应力开裂(SSC:Sulfide Stress Cracking)。这种开裂容易发生在油井用钢管或焊接结构的焊接区等强度比较高的钢上;裂纹因受外部应力(工作应力或残余应力)的作用而沿与应力轴垂直的方向传播。另一种是在无外部应力的情况下也会发生的开裂,叫做氢诱发开裂(HIC:Hydrogen Induced Cracking)。它是平行于钢板表面而产生的裂纹,但也有沿板厚方向成阶梯状扩展的情况。这种平行于板面的裂纹,因在表面上观察到有“鼓泡”,以前称为“氢鼓
I. INTRODUCTION There are two types of cracking known to exist in a wetted environment containing hydrogen sulfide. The two modes of cracking are shown in Figure 1. One is called Sulfide Stress Corrosion Cracking (SSCC) or Sulfide Stress Cracking (SSC). This kind of cracking is easy to occur on the steel with higher strength such as the welded steel pipe of the oil well or the welded structure. The crack propagates in a direction perpendicular to the stress axis due to external stress (working stress or residual stress). The other is cracking that occurs in the absence of external stresses called Hydrogen Induced Cracking (HIC). It is parallel to the surface of the steel plate cracks, but also along the thickness of the ladder-like expansion of the situation. This crack parallel to the plate surface, as observed on the surface of the “bubbling”, formerly known as "Hydrogen Drum