山东冶金
山東冶金
산동야금
SHANDONG METALLURY
2014年
2期
29-33
,共5页
锚链钢%Mn2钢%低温韧性%热处理%微合金化
錨鏈鋼%Mn2鋼%低溫韌性%熱處理%微閤金化
묘련강%Mn2강%저온인성%열처리%미합금화
anchor chain steel%Mn2 steel%low temperature toughness%heat treatment%microalloying
对Mn2钢在不同热处理工艺、不同试验温度和不同试样状态下的冲击韧性进行了详细的分析,结果表明:CM690钢在900℃保温90 min水冷淬火,600℃保温90 min水冷回火,在保证钢材的强度满足要求的情况下,可获得良好的韧性;淬火水温超过30℃时,因钢的淬透能力下降,会强烈地降低钢的强度和韧性;钢中加入0.015%~0.025%的Ti,提高冲击韧性值35~40 J;对于CM490钢,若轧后空冷或堆冷,由于冷却速度较低,会获得铁素体+珠光体+贝氏体的混合组织,不利于提高钢材的韧性,而正火后其组织为铁素体+贝氏体,其冲击值比前两种状态高3~5倍。
對Mn2鋼在不同熱處理工藝、不同試驗溫度和不同試樣狀態下的遲擊韌性進行瞭詳細的分析,結果錶明:CM690鋼在900℃保溫90 min水冷淬火,600℃保溫90 min水冷迴火,在保證鋼材的彊度滿足要求的情況下,可穫得良好的韌性;淬火水溫超過30℃時,因鋼的淬透能力下降,會彊烈地降低鋼的彊度和韌性;鋼中加入0.015%~0.025%的Ti,提高遲擊韌性值35~40 J;對于CM490鋼,若軋後空冷或堆冷,由于冷卻速度較低,會穫得鐵素體+珠光體+貝氏體的混閤組織,不利于提高鋼材的韌性,而正火後其組織為鐵素體+貝氏體,其遲擊值比前兩種狀態高3~5倍。
대Mn2강재불동열처리공예、불동시험온도화불동시양상태하적충격인성진행료상세적분석,결과표명:CM690강재900℃보온90 min수랭쉬화,600℃보온90 min수랭회화,재보증강재적강도만족요구적정황하,가획득량호적인성;쉬화수온초과30℃시,인강적쉬투능력하강,회강렬지강저강적강도화인성;강중가입0.015%~0.025%적Ti,제고충격인성치35~40 J;대우CM490강,약알후공랭혹퇴랭,유우냉각속도교저,회획득철소체+주광체+패씨체적혼합조직,불리우제고강재적인성,이정화후기조직위철소체+패씨체,기충격치비전량충상태고3~5배。
The impact toughness of Mn2 steel in different heat treatment process, different temperature and different sample status is carried on the detailed analysis and research. The results showed that:CM690 steel in 900℃heat and preservation 90 min water quenching, 600 ℃ heat and preservation 90 min water tempering, under the condition of meet the requirements of ensuring the strength of the steel can obtain good toughness;During the quenching temperature exceeds 30℃, because steel hardening ability to drop, will strongly decrease the strength and toughness of steel;Adding 0.015%-0.025%of Ti in steel, can significantly improve the impact toughness value 35-40 J;For CM490 steel, if after rolling the air cooling or heap cooling, due to the low cooling speed, will be a mixture of ferrite + pearlite + bainite, which is not conducive to improve the toughness of the steel, and after normalizing its organization mixture is ferrite+bainite, its impact value is higher three to five times than the first two state.