新型V-Ti-B微合金化调质Q690E钢板的开发
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摘要
通过低碳及"Mn-Cr-Mo-B-V-Ti"微合金化成分设计及轧制、热处理工艺选择,成功开发出工程机械用Q690E钢板(/%:0.10～0. 15 C,0. 20～0.40 Si,≤0.015 P,≤0.005 S,0.30～0.40 Cr,0.20～0. 30 Mo,0.035～0.045 V,0.01～0.02 Ti,0.001～0.002 B)。Q690E钢板880～910℃淬火+570～610℃回火的微观组织为回火索氏体,屈服强度811～891 MPa,抗拉强度852～938 MPa,-40℃冲击功在132～167 J,满足GB/T16270-2009对Q690E工程机械用钢力学性能的要求,结果满足用户严格使用要求,同时降低了生产成本。
The Q690 E steel plate for engineering machinery(/% :0. 10 ～ 0. 15 C,0. 20 ～ 0. 40 Si,≤0. 015 P,≤0.005 S,0.30～0. 40 Cr,0.20～0.30 Mo,0.035 ～0.045 V,0.01 ～0.02 Ti,0.001～ 0. 002 B) has been developed through low carbon and "Mn-Cr-Mo-B-V-Ti" microalloyed components design,rolling and heat treatment technology selecting.The microstructure of Q690 E steel plate guenched at 880 ～910℃+tempered at 570 ～610 ℃ is tempered sorbite with yield strength 811 ～891 MPa,tensile strength is 852 ～938 MPa and-40℃ impact energy 132 ～ 167 J. It can meet the requirements of GB/T16270-2009 on mechanical properties for Q690 E Steel. The result is that,while meeting the increasingly stringent requirements of users,the production costs are reduced.
The Q690 E steel plate for engineering machinery(/% :0. 10 ～ 0. 15 C,0. 20 ～ 0. 40 Si,≤0. 015 P,≤0.005 S,0.30～0. 40 Cr,0.20～0.30 Mo,0.035 ～0.045 V,0.01 ～0.02 Ti,0.001～ 0. 002 B) has been developed through low carbon and "Mn-Cr-Mo-B-V-Ti" microalloyed components design,rolling and heat treatment technology selecting.The microstructure of Q690 E steel plate guenched at 880 ～910℃+tempered at 570 ～610 ℃ is tempered sorbite with yield strength 811 ～891 MPa,tensile strength is 852 ～938 MPa and-40℃ impact energy 132 ～ 167 J. It can meet the requirements of GB/T16270-2009 on mechanical properties for Q690 E Steel. The result is that,while meeting the increasingly stringent requirements of users,the production costs are reduced.
引文
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[3]桑德广,张朋.热处理工艺对960MPa级调质钢板强韧性的影响[J].宽厚板,2013,19(3):6-9.
[4]张规华,李常牛,桑德广.低合金高强度钢WQ960E的研制开发[J].宽厚板,2010,16(2):5-8.
[5]冯路路,张炜星,何元春.高强度结构钢Q690E的开发[J].宽厚板,2009,15(4):27-29.
[6]李德刚,杨维宇,白雅琼,等.60 mm厚Q690D钢连续冷却转变静态CCT曲线及组织[J].热加工工艺,2014,43(10):54-56.
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