【摘要】 研究了用奥氏体焊条焊接珠光体耐热钢-13CrMo44异种钢接头的碳迁移行为和贫碳区对接头中温强度的影响,以及温度和组织对碳迁移的影响。研究结果表明:在这种异种钢接头中,碳迁移的敏感温度区间是在铁素体母材相变点Ac₁以下的高温区,在一般焊接规范下,碳迁移在焊态是不明显的,当贫碳区宽度为6—114μm时,该区软化的铁素体组织对接头的中温强度无影响,断裂都发生在母材上。更多还原

【Abstract】 The carbou migratiou behaviour and the effect of decar-burization on the strength at elevated temperature in the 13CrMo44 joiuts welded with austenitic electrodes were studied. The effects of temperature and structure on the carbon migration were also done. The reseaech results show that the sensitive temperature range of carbon migration in the dissimilar -metal joints is at the high temperature range below Ac1 of the ferritic base metal. Carbon migration in the joints as welded is not obvious under normal welding parameters, with the range of decarburized band from 6 to 114μm, the soft ferritic structures do not have an effect on the strength at elevated temperature and ruptures always occur in base metals.更多还原