Innovation in Science and Technology

Failure Analysis of Heat-Exchanger Sheets at Coke Oven

J. N. Mohapatra — 2025-10-09

The heat exchanger sheets at JSW Steel coke oven is 316L used in ammonia stripping / distillation waste water plate heat exchanger (PHE) with the waste water inlet temperature 110^oC and outlet temperature 40^oC, with water temperature between 35-43^oC. The solution include 250mg/liter Ammonical Nitrogen open to atmosphere. The sheets of two heat exchangers, showed pitting/pin holes all over the plates in just 14 days of use after commissioning. Chemical composition of the sheets showed lower Ni (9.3-9.6% against 10%) than the specification. Varying hardness (189-249 Hv0.5 kgf) on the sheets indicating different phases present on the sheets. The analysis revealed the pits are from the top surface (extrusion side) of the plates. SEM-EDS revealed presence of chlorine on the plate, leading to pitting corrosion of the plates. The sheets were checked for their magnetic properties by a permanent magnet showed attracting nature and with a NDE magnetic device the sheets showed magnetic hysteresis loop, indicating presence of magnetic phase (deformation induced martensite) in the sheets. It is inferred that, martensitic transformation from the austenite due to severe plastic deformation has occurred at the manufacturing stage. Hence, galvanic effect caused by the presence of two distinct phases, austenite and martensite, which exhibit different corrosion potentials lead to formation of pitting corrosion due to presence of higher level of chlorides in the water.

Research on the Dynamic Control Path of Procurement Costs Driven by Information Technology Tools: A Case Study of the QG Project

Kai Zhang — 2025-10-09

This paper takes the QG project as a case study to explore the application paths of information technology (IT) tools in the dynamic control of procurement costs. By analyzing the current status of procurement cost control in the project, it was found that traditional methods suffer from high budget deviation rates and cost overruns. To address these issues, a dynamic cost control path driven by IT tools was designed and implemented, which includes the selection and integration of tools, the construction of a dynamic cost monitoring system, and the optimization of cost control strategies. After implementation, the project’s budget deviation rate decreased from 6.25% to 2.5%, and cost savings of 30 million yuan were achieved. The study demonstrates that IT tools can effectively enhance the precision and dynamism of procurement cost control, providing practical experience and theoretical support for the standardization of information-based procurement systems in small and medium-sized technology enterprises.

Enhancing the Production Efficiency of Textile Dyeing Auxiliaries through Intelligent Retrofitting of Storage Systems: A Case Study of Leveling Agent Storage

Dongmei Shi — 2025-10-09

The widespread application of intelligent technologies in the manufacturing sector has ushered in new opportunities for the textile dyeing auxiliaries industry to undergo technological upgrades. This paper examines the intelligent retrofitting of leveling agent storage equipment at Wuxi Lianda Chemical Co., Ltd., focusing on the feasibility of real-time monitoring and automatic regulation of storage conditions through the integration of temperature and humidity sensors and Internet of Things (IoT) modules. The study results indicate a significant reduction in the loss rate of leveling agents from 8% to 2%, alongside enhanced product quality stability and production efficiency. The practical value of the retrofitted equipment in shortening delivery cycles and stabilizing product quality was verified through purchase order data from Yixing Xinweilong Printing and Dyeing Co., Ltd. Additionally, this paper proposes an industrialization path of “patent equipment – intelligent upgrading – customer feedback,” offering a replicable operational solution for industry technological transformation. Looking ahead, the continuous development of intelligent technologies will provide new impetus for the sustainable development of enterprises in the textile dyeing auxiliaries sector.

Development and Die-Cutting Process Optimization of High-Temperature-Resistant and Anti-Aging Barcode Substrate for Photovoltaic Modules

Quanzhen Ding — 2025-10-09

This study addresses the durability issues of barcode substrates for photovoltaic (PV) modules under extreme conditions such as high temperature, high humidity, and intense ultraviolet (UV) radiation. A three-layer structured barcode substrate with high-temperature resistance and anti-aging properties was developed, and the die-cutting process was optimized. The three-layer structure consists of a polyethylene terephthalate (PET) substrate layer, a polyimide (PI) anti-aging layer, and a wear-resistant coating. The synergistic effect of these layers significantly enhances the substrate’s temperature resistance and anti-aging performance. Experimental results indicate that after 100 thermal cycles, the tensile strength retention rate of the three-layer structured substrate reaches 92%, much higher than the 65% of traditional PET substrate. After 1000 hours of UV irradiation, the color difference (ΔE) is only 1.5, compared to the 4.0 of traditional PET substrate. Following the optimization of the die-cutting process, the burr rate was reduced from 8% to 0.5%, and the material utilization rate increased from 82% to 95%. In the pilot application at Mingyang Smart and the long-term testing in desert power stations, the three-layer structured barcode substrate demonstrated excellent performance, with a barcode integrity rate of 98%, significantly higher than the 70% of traditional PET substrate. This study provides significant technical support for the development of barcode substrates for PV modules, promoting the high-quality development of the PV industry.