【摘要】：通過夏比沖擊試驗研究了回火溫度對高強度低碳結(jié)構(gòu)鋼沖擊韌性的影響,并采用掃描電鏡、透射電鏡分析了產(chǎn)生回火脆性的機理。結(jié)果表明,該高強度鋼在580℃、610℃較高溫度回火時產(chǎn)生回火脆性,-20℃夏比沖擊功由238 J(550℃時)降低至19 J(580℃時),沖擊斷口由韌性斷裂轉(zhuǎn)變?yōu)榇嘈詳嗔?這主要是由于晶界上析出大量較大尺寸的含鉬M23C6脆性相,在晶界上起到了裂紋源的作用。
[Abstract]:The effect of tempering temperature on impact toughness of high strength and low carbon structural steel was studied by Charpy impact test. The mechanism of tempering brittleness was analyzed by SEM and TEM. The results show that the tempering brittleness of the high strength steel at 580 鈩，

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