Journal of Welding and Joining最新文献_第2页

Wear Properties of High-Hardness Tool Steel by Directed Energy Deposition Based Additive Manufacturing 定向能沉积增材制造高硬度工具钢的磨损性能

Journal of Welding and Joining Pub Date : 2023-06-30 DOI: 10.5781/jwj.2023.41.3.4

Sungwook Kim, Chang-Keun Chun

{"title":"Wear Properties of High-Hardness Tool Steel by Directed Energy Deposition Based Additive Manufacturing","authors":"Sungwook Kim, Chang-Keun Chun","doi":"10.5781/jwj.2023.41.3.4","DOIUrl":"https://doi.org/10.5781/jwj.2023.41.3.4","url":null,"abstract":"Recently, with the increase in the application of UHSS plates in automobiles, the service life of existing molds is being shortened, and directed energy deposited type 3D printing technology is being considered as a way to extend the service life. In this study, in order to improve the service life of cold molds, the wear characteristics of the deposited parts using composition systems were analysed, and the possibility of practical application was estimated through evaluation with shear molds.Since the high hardness of AM layer can be reached without additional heat treatment, it was expected to improve the service life when applied to the surface of the mold. Through the wear evaluation of the ball-on-disk method, it was confirmed the wear performance improvement of M4, and as a result of the shear mold life evaluation of 1.5 GPa class high-strength automotive steel plate for the M4 deposited, it was found that shear up to 17,000 strokes were possible. When the number of strokes was increased, a fracture layer due to deposition was observed in the cross-section of the mold surface, and it is believed that additional heat treatment research is required to improve the life of the AM mold.","PeriodicalId":253691,"journal":{"name":"Journal of Welding and Joining","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124802215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Study on the Change of Wire Feeding Speed in GTA Welding (Ⅰ) - Changes in the Modes of Metal Transfer - GTA焊接送丝速度变化的研究(Ⅰ)-金属传递模式的变化-

Journal of Welding and Joining Pub Date : 2023-06-30 DOI: 10.5781/jwj.2023.41.3.9

Dae-Jin Park, Jehyoung Cho, Youngwhan Park

引用次数: 1

A Study on the Optimization of 3D Printing Additive Manufacturing by Direct Energy Deposition Method Using High Speed Steel Material 高速钢材料直接能量沉积法3D打印增材制造优化研究

Journal of Welding and Joining Pub Date : 2023-06-30 DOI: 10.5781/jwj.2023.41.3.1

Y. Kwon, SeongSeon Shin, S. Joo, Jong-hyeon Lee, Ju-Yi Hwang, HyunDeok Kim

引用次数: 0

A Study on Electromagnetic Riveting Behavior of High-Strength Rivets Depending on Hardness 硬度对高强度铆钉电磁铆接性能影响的研究

Journal of Welding and Joining Pub Date : 2023-06-30 DOI: 10.5781/jwj.2023.41.3.2

B. Yoon, J. Shim, D. Choo

{"title":"A Study on Electromagnetic Riveting Behavior of High-Strength Rivets Depending on Hardness","authors":"B. Yoon, J. Shim, D. Choo","doi":"10.5781/jwj.2023.41.3.2","DOIUrl":"https://doi.org/10.5781/jwj.2023.41.3.2","url":null,"abstract":"Recently, the application of aluminum based on ultra-high strength steel is expanding around high-end models of electric vehicles, so it is necessary to develop strategic welding/joining technologies for these materials. In the case of overseas advanced automobile companies, such development is being carried out at the level of introducing mass production facilities through the development of joining technology, but in Korea, the localization rate of original core technology and related equipment in the field of welding and joining is still very insufficient. Therefore, in this study, in order to develop a high-strength rivet suitable for the rivet process during the multi-material bonding process, cold forging steel was used to attain an appropriate level of hardness through changes in the microstructure through heat treatment. Rivets with different hardness were fabricated through heat treatment, and flaring and tensile test were conducted. As a result of flaring test of rivets, buckling occurred with hardness values of Hv 447 and 486, while cracks occurred without buckling in rivets with hardness values of Hv 506. But as a result of tensile shear test using GA980 and Al5052 materials, there was no significant difference in tensile shear load values according to hardness values of the rivets.","PeriodicalId":253691,"journal":{"name":"Journal of Welding and Joining","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121074751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical Investigation on Reduction Characteristics of Welding Deformation According to Standoff Distance in Heat Sink Welding Process 散热器焊接过程中焊接变形随距离减小特性的数值研究

Journal of Welding and Joining Pub Date : 2023-06-30 DOI: 10.5781/jwj.2023.41.3.11

Ji-Hyun Yi, Bum-su Go, Yong-Hyuk Kwon, H. Bang

{"title":"Numerical Investigation on Reduction Characteristics of Welding Deformation According to Standoff Distance in Heat Sink Welding Process","authors":"Ji-Hyun Yi, Bum-su Go, Yong-Hyuk Kwon, H. Bang","doi":"10.5781/jwj.2023.41.3.11","DOIUrl":"https://doi.org/10.5781/jwj.2023.41.3.11","url":null,"abstract":"Welding with a trailing heat sink process is proposed as a useful technique to reduce welding deformation without a significant loss of manufacturing efficiency. In particular, this method is effective than the existing mechanical or thermal correction method in thin plate steel structures with low stiffness. In this study, a three-dimensional thermal elastic-plastic finite element model using a 3-mm thick 304L stainless steel sheet was developed to simulate heat sink welding. The reduction characteristics of welding deformation according to the standoff distance between the welding heat source and the heat sink zone was investigated in the numerical simulation. The results confirmed that the longitudinal and angular deformations were significantly reduced compared with those by conventional welding. The longitudinal deformation was reduced by approximately 60%, from 5.50 mm to 2.22 mm, and the angular deformation was reduced by approximately 70%, from 1.68 mm to 0.51 mm. The overall results obtained in the numerical analysis indicated that welding deformation significantly decreased as the standoff distance was shorter owing to the temperature cooling effect of the welds.","PeriodicalId":253691,"journal":{"name":"Journal of Welding and Joining","volume":"127 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122265151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Post-Weld Heat Treatment Temperature on the Mechanical Properties and Microstructure of Weld Heat-Affected Zone of 2.25Cr-1Mo Steel 焊后热处理温度对2.25Cr-1Mo钢焊接热影响区力学性能和组织的影响

Journal of Welding and Joining Pub Date : 2023-06-30 DOI: 10.5781/jwj.2023.41.3.5

Yongjoon Kang, Kangmyung Seo, Jun-Ho Lee, Chang-Young Oh, Seung-Gun Lee

引用次数: 0

Global Market Analysis for Welding Consumables and Welding Robot (Ⅱ) 焊接耗材及焊接机器人全球市场分析(Ⅱ)

Journal of Welding and Joining Pub Date : 2023-06-30 DOI: 10.5781/jwj.2023.41.3.6

Byeong-jin Kim, Minjung Kang, Jason Cheon

{"title":"Global Market Analysis for Welding Consumables and Welding Robot (Ⅱ)","authors":"Byeong-jin Kim, Minjung Kang, Jason Cheon","doi":"10.5781/jwj.2023.41.3.6","DOIUrl":"https://doi.org/10.5781/jwj.2023.41.3.6","url":null,"abstract":"This study analyzed the market trends of welding consumables and welding robots from international welding industries using data reported by SHIMPO CORPORATION. Recently established companies are planning to use automation to achieve high performance with cheap labor. In this context, welding robots are commonly used in manufacturing facilities to perform high-quality welds at a faster rate than with manual welding. In addition, most welding procedures exhaust welding consumables such as rods and wires. Therefore, it is possible to estimate the trends of the overall welding market and related application industry market through the market trends of welding robots and welding con- sumables. From 2009 to 2021, the sales of welding consumables grew at a compound annual growth rate (CAGR) of 2.17%, whereas those of welding robots grew at a CAGR of 11.17%. The higher growth rates in developing countries have lifted up the overall market growth, whereas the rates in leading markets such as the US and China have tended to slow down. In conclusion, the increasing demands for manufacturing and construction in developing countries such as India and Southeast Asia are expected to drive the market growth in the coming years.","PeriodicalId":253691,"journal":{"name":"Journal of Welding and Joining","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123627192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of Joint Quality 980 MPa Grade GA Steel Sheet and 5052 Aluminum Alloy by Electromagnetic Self-Piercing Riveting 980mpa级GA钢板与5052铝合金电磁自穿孔铆接质量的研究

Journal of Welding and Joining Pub Date : 2023-06-30 DOI: 10.5781/jwj.2023.41.3.3

Min-Seok Kim, Sung-Jin Park, J. Shim

{"title":"Investigation of Joint Quality 980 MPa Grade GA Steel Sheet and 5052 Aluminum Alloy by Electromagnetic Self-Piercing Riveting","authors":"Min-Seok Kim, Sung-Jin Park, J. Shim","doi":"10.5781/jwj.2023.41.3.3","DOIUrl":"https://doi.org/10.5781/jwj.2023.41.3.3","url":null,"abstract":"Generally, an approximately 1% weight reduction in a 200 kg automobile improves the fuel economy by 20~26% and acceleration performance by 8%. Hence, various techniques for automotive lightweighting have been developed to satisfy environmental regulations of the automotive industry. The joining of dissimilar materials is critical for assembling lightweight body structures, but fusion welding is inapplicable owing to the difference in mechanical properties between materials. Thus, the development of an appropriate dissimilar material-joining process is required to produce high-quality joints. Self-piercing riveting is a representative joining process that is applied by pressure punching without prehole piercing. Operationally, this process is widely used for joining because it can produce joints with high shear strengths. However, the development of lighter and higher-strength materials indicates that the required force for SPR machines to form high-quality joints is increasing. Thus, high-speed E-SPR has been developed for joining ultrahigh tensile steels. In this study, SGAFC980/A5052-H34 was applied to the E-SPR process, and the joint characteristics were analyzed via cross-sectional analysis and shear strength tests. With an increase in the fastening speed, the interlock distance and the tensile shear load increased.","PeriodicalId":253691,"journal":{"name":"Journal of Welding and Joining","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133005376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Study on the Change of Wire Feeding Speed in GTA Welding (Ⅱ) - Development of Weld Bead Shape Prediction Model - GTA焊接送丝速度变化的研究(Ⅱ)-焊缝形状预测模型的建立-

Journal of Welding and Joining Pub Date : 2023-06-30 DOI: 10.5781/jwj.2023.41.3.10

Daekyu Park, C. Lee, Youngwhan Park

引用次数: 0

Improved Accuracy of Prediction of Thermal Deformation of the Stern Shaft Block Considering the Erection Process 考虑安装过程提高尾轴块热变形预测精度

Journal of Welding and Joining Pub Date : 2023-06-30 DOI: 10.5781/jwj.2023.41.3.8

Jun-Seok Park, Hyun-ho Lee, J. Seo

引用次数: 1