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Rapid forming method and device of martensitic steel composite structure

A martensitic steel and composite structure technology, used in transportation, packaging, vehicle parts, etc., can solve the problems of low forming temperature and poor formability, and achieve the effects of improving formability, fatigue performance, and forming efficiency.

Active Publication Date: 2019-02-12
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limited failure strain of carbon fiber composite materials, the martensitic steel-carbon fiber composite laminate has poorer formability, and in order not to damage the resin's own structure, the forming temperature is low, and it cannot be used at a temperature of 900 °C like a pure martensitic steel structure. hot stamping for forming

Method used

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  • Rapid forming method and device of martensitic steel composite structure
  • Rapid forming method and device of martensitic steel composite structure
  • Rapid forming method and device of martensitic steel composite structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A rapid liquid-filled forming method for a martensitic steel composite plate structure, comprising the following steps:

[0039] 1) Surface treatment of martensitic steel: Use acetone to clean and degrease the surface of 0.5mm thick martensitic steel, and use phosphating solution for phosphating treatment after sandblasting. The formula of the phosphating solution used is: zinc oxide 12 g / L, sodium nitrate 4 g / L, surfactant OP-10 emulsifier 5 g / L, surfactant sodium dodecylbenzene sulfonate 5 g / L, hydrogen Sodium oxide and phosphoric acid adjust the pH to 2~4. The phosphating process is carried out at 25°C, the water temperature of the phosphating solution is 26°C, and the phosphating time is 10 minutes.

[0040] 2) Lay-up: Choose 0.25mm carbon fiber nylon prepreg, and use 2 / 1 structure to pave the surface-treated martensitic steel sheet and carbon fiber nylon prepreg. The specific structure is steel / 0° / 0° / 0° / 0° / steel.

[0041] 3) Heating and rapid transfer: Heat the...

Embodiment 2

[0047] Embodiment 2: An impact-liquid-filling-shot-peening integral forming method of a martensitic steel composite plate structure comprises the following steps:

[0048] 1) Surface treatment of martensitic steel: use acetone to clean and degrease the surface of 0.3 mm thick martensitic steel, and use phosphating solution for phosphating treatment after sandblasting. The formula of the phosphating solution used is: zinc nitrate 26g / L, zinc oxide 14g / L, sodium fluoride 8g / L, phosphoric acid 310m / L, nickel nitrate 6g / L, copper nitrate 0.03g / L, ethanol 7.5g / L, Surfactant OP-10 emulsifier 5g / L, surfactant sodium dodecylbenzenesulfonate 5g / L. The phosphating process is carried out at 25°C, the water temperature of the phosphating solution is controlled between 30°C, and the phosphating time is 10 minutes.

[0049] 2) Lamination: Choose 0.15mm carbon fiber reinforced nylon prepreg, and lay the surface-treated martensitic steel sheet and carbon fiber nylon prepreg in a 3 / 2 structur...

Embodiment 3

[0054] Embodiment 3: An impact-liquid-filling-shot-peening integral forming method of a martensitic steel composite plate structure, comprising the following steps:

[0055] 1) Surface treatment of martensitic steel: use acetone to clean and degrease the surface of 0.2mm thick martensitic steel, and use phosphating solution for phosphating treatment after sandblasting. The formula of the phosphating solution used is: zinc oxide 12 g / L, sodium nitrate 4 g / L, surfactant OP-10 emulsifier 5 g / L, surfactant sodium dodecylbenzene sulfonate 5 g / L, hydrogen Sodium oxide and phosphoric acid adjust the pH to 2~4. The phosphating process is carried out at 25°C, the water temperature of the phosphating solution is 26°C, and the phosphating time is 10 minutes.

[0056] 2) Lay-up: Choose 0.125mm carbon fiber nylon prepreg, and pave the surface-treated martensitic steel sheet and carbon fiber nylon prepreg in a 4 / 3 structure. The specific structure is steel / 0° / 90° / 0° / 90° / 0° / steel / 0° / 90° / 0...

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Abstract

The invention relates to a rapid forming method and device of a martensitic steel composite structure. The rapid forming method comprises the following steps that surface treatment of martensitic steel is carried out; layering is carried out; heating and rapid transferring are carried out; and pressure holding curing is carried out. The rapid forming device comprises a concave mold, a hydraulic bin, a water cooling system, a pressure monitoring system and an oil circulation control system, wherein the hydraulic bin is connected with an oil inlet for charging oil into the hydraulic bin, the water cooling system is used for cooling a stamped formed part, the pressure monitoring system is used for monitoring the forming pressure, and the oil circulation control system is used for filling thehydraulic bin with the oil. According to a rapid forming method and device, thermoplastic resin is used for replacing thermosetting prepreg to improve the molding efficiency and the high efficiency ofviscous flow rapid forming, and rapid cementation and solidification of a martensitic steel-carbon fiber composite laminate are achieved.

Description

technical field [0001] The invention relates to a forming method and a forming device, in particular to a rapid forming method and a forming device of a martensitic steel composite structure. Background technique [0002] The development trend of the new generation of automobiles requires energy saving, consumption reduction, environmental protection and safety. Reducing the weight of automobiles is one of the most effective measures for automobiles to reduce fuel consumption and emissions. According to statistics, the three major assemblies of car body, chassis (including suspension system), and engine account for more than 70% of the total weight of a car, among which the weight of the inner and outer covering parts of the car body ranks first, accounting for about 30% of the total weight of the car above. For the car itself, about 70% of the fuel consumption is used for the body mass, so the lightweight of the car body is very important to reduce the weight of the whole...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/02B21D22/02B21D53/88
CPCB21C37/02B21D22/02B21D53/88
Inventor 李华冠张浩费炜杰王章忠吕学鹏
Owner NANJING INST OF TECH
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