A.直焊縫的分段焊接 B.焊件的預(yù)熱處理 C.焊接后進(jìn)行退火處理 D.加強(qiáng)板邊約束,阻止被焊接板件變形的發(fā)生
A.設(shè)計(jì)應(yīng)力B.計(jì)算應(yīng)力C.容許應(yīng)力D.折算應(yīng)力
A.當(dāng)鋼材處于同號(hào)應(yīng)力場(chǎng)時(shí),鋼材易發(fā)生塑性破壞;而當(dāng)處于異號(hào)應(yīng)力場(chǎng)時(shí),鋼材易發(fā)生脆性破壞 B.當(dāng)鋼材處于同號(hào)應(yīng)力場(chǎng)時(shí),鋼材易發(fā)生脆性破壞;而當(dāng)處于異號(hào)應(yīng)力場(chǎng)時(shí),鋼材易發(fā)生塑性破壞 C.無(wú)論是同號(hào)應(yīng)力場(chǎng),還是異號(hào)應(yīng)力場(chǎng),鋼材都易于發(fā)生塑性破壞 D.無(wú)論是同號(hào)應(yīng)力場(chǎng),還是異號(hào)應(yīng)力場(chǎng),鋼材都易于發(fā)生脆性破壞