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对9％Ni钢进行了实际焊接接头和模拟HAZ(热影响区)韧性的研究。经恒电位腐蚀法显示,呈弥散分布的回转奥代体A′能细化晶粒、提高HAZ的低温韧性。施焊中采用多道、多层、小线能量,可使焊接接头的HAZ形成回转奥氏体A′。
The 9% Ni steel was studied for the actual weld joint and the simulated HAZ (heat affected zone) toughness. The results of potentiostatic etching show that the Auger body A ’in the form of dispersed rotation can refine grains and improve the low temperature toughness of HAZ. The use of multi-channel welding, multi-layer, a small amount of energy, can make the welding joint HAZ form a rotating austenite A ’.