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一、前言氢渗入钢后会显著降低钢的塑性,甚至出现开裂。如果除去钢中的氢,则可以恢复塑性,称之谓可逆氢脆。当钢中氢已给钢的结构造成缺陷(例如白点、发裂、点状偏析等),即使把氢除掉,钢的塑性亦不再恢复,这通常称之谓不可逆氢脆。近年来,许多资料报导了零件在含氢气氛中热处理时引起氢脆的问题[2～5]。一般都认为此时的氢脆是由于热处理气氛中含有氢原子并渗入钢中造成的。一些作者还通过各种办法,使已产生氢脆钢的塑性指标得到恢复,说明此时的氢脆是可逆氢脆。
First, the preface Hydrogen penetration into steel will significantly reduce the plasticity of steel, or even cracking. If you remove the hydrogen in the steel, you can restore the plastic, called reversible hydrogen embrittlement. When hydrogen in the steel has caused defects in the structure of the steel (such as white spots, cracking, point segregation, etc.), the plasticity of the steel is not restored even if the hydrogen is removed, which is often referred to as irreversible hydrogen embrittlement. In recent years, many sources have reported the problem of hydrogen embrittlement when parts are heat-treated in a hydrogen-containing atmosphere [2, 5]. Generally believed that the hydrogen embrittlement at this time is due to heat treatment atmosphere contains hydrogen atoms and infiltration into the steel caused. Some authors also adopted various measures to restore the plasticity index of the hydrogen-embrittled steel that has been produced, indicating that the hydrogen embrittlement at this time is reversible hydrogen embrittlement.