锻压技术

超大尺寸平板硫化机特厚复合钢板开发

英文标题：Development of extra-thick composite steel plate for extra-large size plate vulcanizing machine

分类号：TG335.5

出版年,卷(期):页码：2024,49(6):149-154

摘要：

采用焊前预热、真空电子束焊接、低加热速度加热、合理道次压下率轧制和热处理工艺，成功生产出超大尺寸（170 mm×3420 mm×10620 mm）平板硫化机45钢特厚复合钢板，其平均硬度达到199 HB。并且，上、下复合面位置与整板中间1/2位置的基体夹杂物分布相似，冶金结合效果良好；回火后组织较为均匀，板材达到GB/T 2970—2016中I级探伤要求。研究发现，不合理的焊前预热速度会加剧真空焊接过程中的坯料变形，在温度较低、组织应力较大的情况下容易产生表面区域裂纹，且该类裂纹在轧制过程中难以消除，需合理控制焊前预热速度。

By adopting pre-heating before welding, vacuum electron beam welding, heating at low heating rate, rolling with reasonable pass reduction rate and heat treatment process, the 45 steel ultra-thick composite steel plate of extra-large size（170 mm×3420 mm×10620 mm）plate vulcanizing machine was successfully produced. Its average hardness is 199 HB. The distribution of matrix inclusions in the upper and lower composite surfaces is similar to that in the middle of the whole plate, and the result of metallurgical bonding is good. The microstructure is relatively uniform after tempering, and the plate meets the requirements of level I flaw detection in GB/T 2970—2016. However, the research shows that the unreasonable pre-heating speed before welding aggravates the deformation of blank during the vacuum welding. When the temperature is low and the microstructure stress is large, the cracks at surface areas occur easily. In addition, these types of cracks are difficult to eliminate during the rolling process, so it is necessary to control the pre-heating speed before welding reasonably.

基金项目：

河北工业大学教改项目（209634110）

作者简介：邬早勤（1982-），男，硕士，高级工程师,E-mail：wuzaoqin@163.com

参考文献：

[1]齐立东,赵靖,王海滨，等.钢铁企业钢丝绳芯输送带无损监测技术应用与实践[J].冶金设备,2022,279(S2):145-148.

Qi L D，Zhao J，Wang H B，et al. Application and practice of non-destructive monitoring technology for steel wire rope core conveyor belts in steel enterprises [J]. Metallurgical Equipment,2022,279(S2):145-148.

[2]齐立东,赵靖.钢丝绳芯输送带无损检测技术应用实践[J].中国钢铁业,2020,(5):58-60.

Qi L D，Zhao J. Application practice of non-destructive testing technology for steel wire rope core conveyor belts [J].China Steel,2020,(5):58-60.

[3]骆宗安,杨德翰,谢广明,等.真空制坯热轧钛/钢复合板工艺及性能[J].钢铁研究学报,2019,31(2):213-220.

Luo Z A，Yang D H，Xie G M，et al. Production process and performance of titanium-steel vacuum roll-cladding plates[J]. Journal of Iron and Steel Research,2019,31(2):213-220.

[4]谢广明,骆宗安,王光磊,等.真空轧制不锈钢复合板的组织和性能[J].东北大学学报：自然科学版,2011,32(10):1398-1401.

Xie G M, Luo Z A, Wang G L, et al. Microstructure and properties of stainless steel clad plate by vacuum rolling cladding[J]. Journal of Northeastern University：Natural Science,2011,32(10):1398-1401.

[5]王明坤,骆宗安,曾周燏,等.热处理工艺对超级奥氏体不锈钢复合板组织与性能的影响[J].东北大学学报：自然科学版,2023,44(6):777-782，798.

Wang M K, Luo Z A, Zeng Z Y, et al. Effect of heat treatment on microstructure and mechanical properties of super austenitic stainless steel clad plate[J]. Journal of Northeastern University：Natural Science，2023,44(6):777-782，798.

[6]Yang D H, Luo Z A, Xie G M, et al. Effect of vacuum level on microstructure and mechanical properties of titanium-steel vacuum roll clad plates[J]. Journal of Iron and Steel Research International, 2018, 25(1):72-80.

[7]GB/T 10561—2023, 钢中非金属夹杂物含量的测定标准评级图显微检验法[S].

GB/T 10561—2023,Determination of content of nonmetallic inclusions in steel—Micrographic method using standard diagrams[S].

[8]王一帆. 振动铸轧钛/铝复合板带力学性能及失效机制研究[D].秦皇岛：燕山大学,2022.

Wang Y F. Study on Mechanical Properties and Failure Mechanism of Vibration Cast-rolling Ti/Al Composite Strip[D]. Qinhuangdao: Yanshan University,2022.

[9]陈生禄,朱琳,刘鑫,等.压下率对不锈钢复合板组织及结合强度的影响[J].机械设计与制造,2020, 350(4):236-239.

Chen S L, Zhu L, Liu X, et al. Effect of reduction rate on microstructure and bonding strength of stainless steel clad plate[J]. Machinery Design & Manufacture,2020, 350(4):236-239.

[10]王光磊.压下率对真空复合轧制特厚钢板复合性能影响规律的研究[D].沈阳：东北大学，2010.

Wang G L. Study on Impact of Rolling Reduction Ratio on the Cladding Properties of Heavy Gauge Roll-cladding Steel Plate[D]. Shenyang: Northeastern University, 2010.

[11]GB/T 2970—2016, 厚钢板超声检测方法[S].

GB/T 2970—2016,Method for ultrasonic testing of thicker steel plates[S].

[12]邬早勤,于健,刘建星,等.真空焊接制坯复合轧制45#特厚钢板的工业生产与研究[J].宽厚板,2021,27(2):37-39.

Wu Z Q, Yu J, Liu J X, et al. Industrial production and research of 45# extra heavy steel plate rolled from vacuum welding composite slab[J]. Wide and Heavy Plate,2021,27(2):37-39.

[13]李军,马晓生.纵波双晶直探头检测中厚钢板近表面缺陷的试验研究[J].山西冶金,2023,46(4):11-14.

Li J, Ma X S. Experimental study on the detection of near surface defects in medium and heavy steel plates using longitudinal wave double crystal straight probes[J]. Shanxi Metallurgy,2023,46(4):11-14.

[14]邬早勤,于健,谢广明,等.大厚度P20高合金模具钢复合轧制工艺开发与研究[J].宽厚板,2021,27(6):4-6.

Wu Z Q, Yu J, Xie G M, et al. Development and research of composite rolling process for large thickness high alloy mould steel P20[J]. Wide and Heavy Plate, 2021,27(6):4-6.

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