Preliminary Study of Automobile Lightweight Technology

Li, M.H.; Li, Z.R.; Jiang, Lijing

doi:10.2991/mmme-16.2016.155

Cited by 6 publications

(4 citation statements)

References 2 publications

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“…This compensatory element is referred to as the flow restrictor. Several types of flow restrictors are available, with commonly used ones including capillary restrictors, [ 3 ] orifice restrictors, [ 4 ] gap restrictors, [ 5 ] membrane feedback restrictors, [ 6,7 ] and slide valve feedback restrictors, [ 8 ] among others.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis and Restrictor Structure Improvement of an Internal Feedback Hydrostatic Turntable Oil Pad Considering Internal Flow

Yang,

Shao,

et al. 2024

Advcd Theory and Sims

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This paper provides a comprehensive exploration of the operational mechanism of an internal feedback hydrostatic turntable. It employs a self‐compensating gap restrictor mechanism, resulting in heightened load capacity and stiffness. In this paper, the concept of internal flow is innovatively introduced. Subsequently, the Reynolds equation is solved using the finite difference method. This methodology offers a more precise and efficient assessment of the load‐bearing performance of the oil pad within the turntable. Then this paper further investigates the influence of the internal flow coefficient and pressure ratio on oil pad performance, encompassing aspects like load capacity, stiffness, and flow rate. Ultimately, optimal parameters are selected to improve the structure of the gap restrictor, considering various operational scenarios. In conclusion, the method adopted in this study not only improves the calculation accuracy and efficiency but also improves the structure and performance of the oil pad.

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Section: Introductionmentioning

confidence: 99%

Performance Analysis and Restrictor Structure Improvement of an Internal Feedback Hydrostatic Turntable Oil Pad Considering Internal Flow

Yang,

Shao,

et al. 2024

Advcd Theory and Sims

View full text Add to dashboard Cite

show abstract

“…Currently, three main directions for the lightweighting of automobiles are encountered: lightweighting of materials, lightweighting of structures, and lightweighting of manufacturing processes [4][5][6][7][8]. The manifestation of lightweight materials is to replace materials with higher specific gravity with lightweight materials.…”

Section: Introductionmentioning

confidence: 99%

Development Trend in Composition Optimization, Microstructure Manipulation, and Strengthening Methods of Die Steels under Lightweight and Integrated Die Casting

Bao,

Yang,

Dong

et al. 2023

Materials

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In the general environment of lightweight automobiles, the integrated die-casting technology proposed by Tesla has become the general mode to better achieve weight reduction in automobiles. The die-casting mold required by integrated die-casting technology has the characteristics of large scale and complexity. Hence, higher requirements are put forward for the comprehensive performance of the die steel. Despite the stagnation in the progress of conventional strengthening methods, enhancing the performance of die steel has become increasingly challenging. Indeed, it necessitates exploring novel die steel and optimizing heat treatment and reinforcement technologies. This article summarizes and analyzes the development status of die steel and corresponding heat treatment and microstructure manipulation as well as strengthening methods and elaborates on an excellent nano-strengthening technology. Furthermore, this review will aid researchers in establishing a comprehensive understanding of the development status of die steel and the processes utilized for its strengthening. It will also assist them in developing die steel with improved comprehensive performance to meet the high demand for mold steel in the integrated die-casting technology of the new era.

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“…In recent years, with the complex changes of the global economic situation, the automobile manufacturing industry has paid more and more attention to the materials and products with high performance and high cost performance. Compared with light alloy and carbon fiber composite materials with high price and relatively complex process, high-strength steel materials are gradually favored by the majority of automobile enterprises [1][2][3]. As the largest automobile manufacturing country in the world, hot stamping technology has been developed in China for nearly 20 years.…”

Section: Introductionmentioning

confidence: 99%

Improvement Study of Hydrogen Embrittlement Resistance of Al-Si Coated Hot Stamped Components

Feng¹,

Huang²,

Song³

et al. 2023

Atlantis Highlights in Materials Science and Technology

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Because of its ultra-high strength, press hardening steel and hot stamped parts are widely used in the reinforcement and lightweight structure of car bodies. At present, there are hydrogen embrittlement barriers in PHS1500~PHS2000 materials with coating and PHS1800~PHS2000 materials without coating. In this paper, based on the conventional thickness coating PHS1500 without niobium and the thin thickness coating PHS1500 with niobium, the corresponding automobile hot stamped front crash beam parts are trial produced. The trial production process is completed under the dew point control condition of -20 °C. Samples were taken from hot stamped parts made of two materials. Firstly, based on the automotive industry standard T/CSAE 155-2020, a U-shaped constant bending load test was carried out to compare the hydrogen embrittlement resistance of parts made of two materials. The results show that under the same external load conditions, the fracture time of the sample of thin coating containing niobium with austenitizing time of 220 s is higher than that of the sample of conventional coating without niobium with austenitizing time of 300 s. Further, TDS and slow strain rate tensile tests were carried out on the samples of the two materials. The results show that the thin coating containing niobium has low diffusive hydrogen content and strong resistance to hydrogen damage. The fundamental reason why the samples with thin coatings containing niobium have stronger hydrogen embrittlement resistance is the regulation effect of niobium on grain boundaries, precipitation and retained austenite, and the stronger inhibition effect of thin coatings on hydrogen induced cracks.

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Preliminary Study of Automobile Lightweight Technology

Cited by 6 publications

References 2 publications

Performance Analysis and Restrictor Structure Improvement of an Internal Feedback Hydrostatic Turntable Oil Pad Considering Internal Flow

Performance Analysis and Restrictor Structure Improvement of an Internal Feedback Hydrostatic Turntable Oil Pad Considering Internal Flow

Development Trend in Composition Optimization, Microstructure Manipulation, and Strengthening Methods of Die Steels under Lightweight and Integrated Die Casting

Improvement Study of Hydrogen Embrittlement Resistance of Al-Si Coated Hot Stamped Components

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