Qiang Jin

Title: Innovations of Qiang Jin in Local Heat Treatment Methods

Introduction

Qiang Jin is a notable inventor based in Qingdao, China. He has made significant contributions to the field of welding technology, particularly through his innovative patent that addresses the control of residual stress in welds. His work is essential for improving the quality and durability of welded structures.

Latest Patents

Qiang Jin holds a patent titled "Local heat treatment method for controlling residual stress with primary and auxiliary heating." This method involves applying a primary heating band to a weld to control the microstructure and hardness of the weld. It also ensures uniformity in the structure, allowing for micro-control of the residual stress. An auxiliary heating band is strategically placed away from the weld to generate compressive stress on the inner surface, achieving macro-control of the compressive stress. This innovative approach eliminates the need for reinforcement with a rib plate, thereby reducing labor intensity and construction time. The method effectively minimizes deformation near the weld and transfers the largest deformation to a non-weld zone. By applying auxiliary heating and strictly controlling the time interval between primary and auxiliary heating, the structure is enhanced while simultaneously controlling welding residual stress. The local heat treatment effect is optimized, resulting in a small tensile or compressive stress on the inner surface of the weld.

Career Highlights

Qiang Jin is affiliated with the China University of Petroleum (East China), where he continues to advance research in welding technology. His expertise and innovative methods have garnered attention in the academic and industrial sectors.

Collaborations

Qiang Jin has collaborated with notable colleagues such as Wenbin Gu and Shandong Tu. Their combined efforts contribute to the advancement of welding techniques and technologies.

Conclusion

Qiang Jin's innovative approach to local heat treatment methods significantly enhances the control of residual stress in welding. His contributions are vital for improving the quality and efficiency of welded structures in various applications.