WO2021179606A1 - 一种异形泡沫铝填充铝合金空腔铸件的制备方法 - Google Patents

一种异形泡沫铝填充铝合金空腔铸件的制备方法 Download PDF

Info

Publication number
WO2021179606A1
WO2021179606A1 PCT/CN2020/122015 CN2020122015W WO2021179606A1 WO 2021179606 A1 WO2021179606 A1 WO 2021179606A1 CN 2020122015 W CN2020122015 W CN 2020122015W WO 2021179606 A1 WO2021179606 A1 WO 2021179606A1
Authority
WO
WIPO (PCT)
Prior art keywords
special
mold
casting
aluminum alloy
preparation
Prior art date
Application number
PCT/CN2020/122015
Other languages
English (en)
French (fr)
Inventor
韩星
刘海峰
孙宇
李鑫磊
Original Assignee
中信戴卡股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中信戴卡股份有限公司 filed Critical 中信戴卡股份有限公司
Priority to US17/775,453 priority Critical patent/US20220395894A1/en
Priority to KR1020227011296A priority patent/KR20220058609A/ko
Publication of WO2021179606A1 publication Critical patent/WO2021179606A1/zh

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/0081—Casting in, on, or around objects which form part of the product pretreatment of the insert, e.g. for enhancing the bonding between insert and surrounding cast metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
    • B22D21/002—Castings of light metals
    • B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D25/00—Special casting characterised by the nature of the product
    • B22D25/02—Special casting characterised by the nature of the product by its peculiarity of shape; of works of art
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/11—Making porous workpieces or articles
    • B22F3/1121—Making porous workpieces or articles by using decomposable, meltable or sublimatable fillers
    • B22F3/1125—Making porous workpieces or articles by using decomposable, meltable or sublimatable fillers involving a foaming process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D7/00—Steering linkage; Stub axles or their mountings
    • B62D7/18—Steering knuckles; King pins
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/0408—Light metal alloys
    • C22C1/0416—Aluminium-based alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2301/00—Metallic composition of the powder or its coating
    • B22F2301/05—Light metals
    • B22F2301/052—Aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
    • B62D29/008—Superstructures, understructures, or sub-units thereof, characterised by the material thereof predominantly of light alloys, e.g. extruded

Definitions

  • the invention belongs to the field of aluminum alloy casting, and specifically relates to a method for preparing a special-shaped aluminum foam filled aluminum alloy cavity casting.
  • the practical lightweight of automobiles is mainly achieved in three ways, namely, lightweight materials, lightweight structures, and lightweight manufacturing processes.
  • Aluminum alloy materials are widely used in the automotive industry due to their low density, high specific strength, good corrosion resistance, excellent thermal conductivity, and easy processing.
  • the aluminum alloy cavity castings can not only achieve lightweight material and structure at the same time, but also maintain the mechanical properties of the castings.
  • the production process of aluminum alloy cavity castings is gravity or low pressure casting through built-in sand cores. Further, the preparation process of sand cores can be divided into machined cores and non-machined cores. Machine-made cores pollute the environment greatly, which will damage the health of workers. At the same time, increasingly stringent environmental protection requirements have further led to increased investment in environmental protection equipment.
  • non-machined core can effectively reduce the pollution to the environment, there are still great difficulties in mass production of domestic non-machined core technology with stable distance.
  • the core technology of the non-machined core is in the hands of developed countries in Europe and the United States. Importing the corresponding equipment requires a lot of investment, which will increase the production cost of aluminum alloy cavity castings and make the products lose competitiveness.
  • Foamed aluminum is a new type of lightweight multifunctional material with a large number of connected or unconnected pores uniformly distributed in the aluminum matrix. It is made by adding additives to pure aluminum or aluminum alloy through a foaming process. It has both metal and The properties of foamed materials. Foamed aluminum has excellent physical properties (small density, low thermal conductivity, large specific surface area), chemical properties (corrosion resistance, strong corrosion resistance), mechanical properties (impact resistance, shock absorption, energy absorption, easy processing) and recyclability , Especially its light weight, shock resistance and energy absorption characteristics.
  • the main purpose of the present invention is to provide a method for preparing special-shaped foamed aluminum filled aluminum alloy cavity castings, which can reduce the wall thickness of the castings to meet the requirement of not increasing the overall quality of the castings, and improve the overall strength of the castings. .
  • the first aspect of the present invention provides a method for preparing a special-shaped aluminum foam filled aluminum alloy cavity casting, and the preparation method includes:
  • the special-shaped aluminum foam is coated with flux and then fixed in the second mold, and
  • the step of preparing special-shaped foamed aluminum in the first mold by powder metallurgy foaming method includes: after pure aluminum powder and titanium hydride are uniformly mixed, a powder pressing method is used to prepare a foamed precursor ; Put a number of the foaming precursors into the preheated first mold for foaming; take it out after heat preservation and cool it down.
  • the special-shaped aluminum foam is prepared by the powder metallurgy foaming method.
  • the pure aluminum powder is mixed with the foaming agent, and the foaming precursor is prepared by the powder pressing method; then, the first mold is placed in the heating furnace Preheat to about 700°C; then, according to the shape of the special-shaped aluminum foam, put several foaming precursors into the first mold according to the pre-designed positions; finally, after keeping the temperature for 3 to 5 minutes, take out the special-shaped aluminum foam for processing Cool down quickly.
  • the blowing agent may be titanium hydride or zirconium hydride, but is not limited thereto.
  • the blowing agent may be titanium hydride, and the amount of titanium hydride used is 0.5 to 1.5 wt% of the total weight.
  • the foaming precursor can be prepared into a relatively regular shape such as a rod shape or a plate shape. Put several foaming precursors into the first mold, and the foaming agent decomposes under high temperature conditions to form bubbles in the molten aluminum, and then a near-net shaped special-shaped aluminum foam can be prepared.
  • the cooling may be strong wind cooling or water mist cooling.
  • the iso-bulk density of the special-shaped aluminum foam is 0.2-0.4 g/mm 3
  • the thickness of the watch case is 1-2 mm.
  • foamed aluminum can be divided into closed-cell foamed aluminum and through-cell foamed aluminum.
  • the pores of the closed-cell foamed aluminum are not connected to each other, the porosity is above 80%, and the pore size is generally 2 to 5 mm;
  • the pores of the foamed aluminum are connected to each other, the porosity is 60-75%, and the pore diameter is generally 0.8-2mm.
  • the special-shaped aluminum foam in the present invention is a closed-cell aluminum foam.
  • the density of the special-shaped aluminum foam is only 0.2 ⁇ 0.4g/mm 3 , and it has the properties of metal and air bubbles at the same time. It has strong impact absorption ability and high temperature resistance. , Strong fire resistance, corrosion resistance, sound insulation and noise reduction, low thermal conductivity, high electromagnetic shielding, strong weather resistance and recyclability.
  • the watch case refers to the thin shell formed on the surface of the special-shaped aluminum foam during the process of preparing the special-shaped aluminum foam by the powder metallurgical foaming method, and is essentially a solidified layer formed by the solidification of the aluminum melt foam during the cooling process. Limiting the thickness of the watch case to 1 to 2 mm is not only conducive to the filling of the aluminum alloy liquid in the subsequent casting process, but also prevents the special-shaped aluminum foam from remelting during filling and causing collapse.
  • special-shaped foamed aluminum is used to fill aluminum alloy cavity castings, which can make the castings have the advantages of aluminum alloy cavity castings and foamed aluminum at the same time, and greatly improve the overall strength of the castings. Therefore, under the premise of ensuring the performance of the casting, the wall thickness of the casting can be reduced, and the quality increase caused by the use of special-shaped aluminum foam can be completely offset.
  • the first mold and the second mold have substantially the same structure, except that the size of the first mold is smaller than that of the second mold.
  • the size difference between the first mold and the second mold is determined according to the wall thickness of the designed aluminum alloy part.
  • the step of coating the special-shaped aluminum foam with flux includes: immersing the special-shaped aluminum foam in the flux heated to 80-100°C for 3-10 minutes and then taking it out, and drying the surface after drying.
  • a white frost-like coating is formed and heated to 500-600°C for heat preservation; preferably, the flux is an aqueous solution of potassium fluorotitanate with a concentration of 5-15%.
  • the main function of the flux is to ensure the smooth progress of the welding process between the special-shaped aluminum foam and the aluminum alloy cavity casting.
  • the soldering flux can remove oxides on the surface of the special-shaped aluminum foam to make the surface reach the necessary cleanliness, and at the same time can prevent the surface from being re-oxidized during soldering, reduce its surface tension, and improve soldering performance. Since the shape of the special-shaped aluminum foam is relatively complicated, in order to ensure that its surface can be fully covered with flux, the special-shaped aluminum foam is directly immersed in the flux.
  • Fluxes can be roughly classified into inorganic, organic acids and rosin.
  • the flux in the present invention can be hydrochloric acid, hydrofluoric acid, sodium fluoride, potassium fluoride, zinc chloride, potassium fluorotitanate And other inorganic acids or inorganic salts.
  • the flux may be an aqueous solution of potassium fluorotitanate, and the concentration may be 5-15%, but is not limited thereto.
  • the special-shaped aluminum foam is immersed in the flux for 3-10 minutes and then taken out. After drying, potassium fluorotitanate covers the surface of the special-shaped aluminum foam and presents a hoarfrost-like coating, which can effectively isolate the air.
  • the step of applying flux to the special-shaped aluminum foam and fixing it in the second mold includes: preheating the second mold to 350-450°C, A layer of paint is sprayed on the inner surface of the aluminum alloy, the special-shaped aluminum foam coated with flux is placed in the second mold for fixing, and the mold is molded in place.
  • heating the second mold to 350-450°C in advance can avoid low mold temperature, forming difficulties, casting cracks and other defects; Very large, causing damage to the mold.
  • an air gun can be used to spray the dust on the surface of the cavity of the second mold to avoid defects on the surface of the casting during the casting process.
  • the sprayed coating is an indispensable auxiliary material for producing high-quality castings.
  • the main function of the coating is to protect the metal mold, facilitate the demolding of the casting, improve the quality of the surface of the casting, and control the heat transfer rate.
  • To improve the surface quality of aluminum alloy castings it is necessary to effectively control the entire process of solidification of the aluminum alloy liquid in the mold. Therefore, the most important role of the second mold inner coating is to form an insulating layer on the inner surface of the mold to control high temperature.
  • the coating is usually prepared by adding water as a carrier, adding a high-temperature adhesive and refractory materials, and the thickness of the coating can be 150-250 ⁇ m.
  • the casting step includes pouring the aluminum alloy liquid with a temperature of 660 to 700° C. into the second mold where the special-shaped aluminum foam is fixed.
  • the aluminum alloy liquid can be firmly welded to the special-shaped aluminum foam through the flux, and even under high temperature conditions, the special-shaped aluminum foam and the aluminum alloy cavity casting can be tightly welded; and
  • the coating helps to demould the aluminum alloy castings and ensure the surface quality.
  • the special-shaped aluminum foam filled aluminum alloy cavity castings are applied to the field of automobile manufacturing, for example, the steering knuckle parts and subframe parts of the vehicle chassis, even under the condition of long-term vibration of the vehicle, it can guarantee the The welding between the special-shaped foamed aluminum and the aluminum alloy cavity casting is firm.
  • the aluminum alloy liquid needs to undergo the processes of melting, refining, composition adjustment, refinement, slag measurement, hydrogen measurement, and standing heat preservation in sequence before casting.
  • Refining is to purify the aluminum alloy liquid, remove alumina slag and gas in the aluminum alloy liquid, so as to avoid casting defects.
  • the composition of the aluminum alloy liquid needs to be analyzed before the composition adjustment, and the composition of the aluminum alloy liquid can be adjusted for the required aluminum alloy castings.
  • the refinement modification is to add a modifier to the aluminum alloy liquid to form a large number of dispersed crystal nuclei, thereby obtaining fine cast crystal grains.
  • the high hydrogen content in the aluminum alloy liquid is the main cause of pinholes in the castings, if the hydrogen content in the aluminum alloy liquid can be controlled, the quality of the aluminum alloy castings can be significantly improved. Therefore, measuring the slag and hydrogen of the aluminum alloy liquid can effectively control the quality of the aluminum alloy liquid.
  • the aluminum alloy used in the present invention is not particularly limited, and may be an aluminum alloy conventionally used for automotive parts.
  • it can be A356, ZL101, ZL102, ZL104, etc.
  • the preparation method further includes a step of post-processing the casting. Specifically, after the casting is taken out, the gate and the riser are cut off, and the casting is subjected to machining, shot blasting and surface treatment according to product requirements.
  • the process of sand shaking, sand falling, sand blowing and sand recovery is omitted, which not only shortens the casting process, but also reduces the cost of equipment, labor and management, and further Increase productivity.
  • the application of the foamed aluminum filled aluminum alloy cavity castings in the field of automobile manufacturing can completely offset the increase in cost caused by the increase of foamed aluminum by improving the noise, vibration, and harshness (NVH) performance of the entire vehicle.
  • NSH noise, vibration, and harshness
  • the aluminum alloy wall thickness of the casting is 4-8mm.
  • the second aspect of the present invention provides a special-shaped aluminum foam filled aluminum alloy cavity casting, which is prepared by the preparation method described in the first aspect of the present invention.
  • the aluminum alloy cavity casting may be a steering knuckle component or a sub-frame component of a vehicle chassis, but is not limited thereto.
  • the special-shaped aluminum foam filled aluminum alloy cavity casting of the present invention replaces the traditional sand core with aluminum foam, and achieves higher strength while meeting the requirements of lightweight, and further, eliminating sand vibration, sand falling, sand blowing, and Processes such as sand recovery improve production efficiency.
  • Figure 1 is a schematic diagram of the structure of the steering knuckle part of the chassis of a foam-filled aluminum vehicle, in which (a) is the steering knuckle, (b) is the special-shaped aluminum foam filled in the steering knuckle;
  • Fig. 2 is a schematic structural diagram of the sub-frame components of a foamed aluminum-filled vehicle chassis, in which (a) is the sub-frame, and (b) is the special-shaped foamed aluminum filled in the sub-frame.
  • the preparation method of the special-shaped aluminum foam filled aluminum alloy cavity casting according to the present invention generally includes the following steps:
  • Pretreatment of aluminum alloy liquid successively including melting, refining, composition adjustment, refinement and slag measurement and hydrogen measurement steps; finally, the aluminum alloy liquid is kept at 660-700°C for use.
  • Pretreatment of the second mold After preparing the cavity of the second mold, put it in a heating furnace and heat it evenly to 350-450°C. After taking it out, use an air gun to spray the dust on the surface of the cavity; Spray paint uniformly on the surface of the cavity, heat it to 350-450°C, and keep it warm for use.
  • Post-processing take out the casting, cut off the gate and riser, and perform processing, shot blasting and surface treatment according to the requirements of the product.
  • the aluminum alloy cavity casting of a certain vehicle chassis—steering knuckle The outer dimension of the casting is 550 ⁇ 160 ⁇ 240mm, the alloy used is A356, the weight is 4.25kg, and the basic wall thickness is 6mm.
  • the steering knuckle component of the vehicle chassis includes its aluminum alloy cavity casting part (as shown in the dashed box in Figure 1a) and the foamed aluminum part filled in the cavity casting (Figure 1b) Shown is the special-shaped aluminum foam filled in the steering knuckle).
  • the outer dimension of the filled foamed aluminum is 300 ⁇ 150 ⁇ 150mm, the material is pure aluminum, the weight is 0.21kg, and the volume density is 0.2 ⁇ 0.4g/cm 3 .
  • Casting process low pressure casting.
  • Preparation of special-shaped aluminum foam firstly, pure aluminum powder and titanium hydride (0.5 to 1.5 wt% of the total weight) are thoroughly mixed uniformly, and then a powder pressing method is used to prepare a foamable precursor; The first foamed mold is preheated to about 700°C in the heating furnace; then, according to the shape of the special-shaped aluminum foam, several foamable precursors are put into the first mold according to the pre-designed positions; heat preservation 3 ⁇ After 5 minutes, take out the special-shaped aluminum foam and cool it quickly.
  • the cooling method is strong wind cooling or water mist cooling.
  • Pretreatment of aluminum alloy liquid refining, modifying and refining the aluminum liquid with qualified chemical composition, heating the aluminum alloy liquid to 680°C, and keeping it warm for use.
  • Pretreatment of the second mold After preparing the cavity of the second mold, put it in a heating furnace and heat it evenly to 380°C. After taking it out, use an air gun to spray the dust on the surface of the cavity, and finally even on the surface of the cavity Spray paint, heat to 380°C, keep warm for later use.
  • Post-processing take out the casting, cut off the gate and riser, and perform processing, shot blasting and surface treatment according to the requirements of the product.
  • the foamed aluminum is special-shaped closed-cell foamed aluminum, and the matrix is industrial pure aluminum, which is directly foamed and formed by a powder method.
  • the thickness of the case is 1.2mm, and the volume density is 0.25g/mm 3 .
  • the flux is an aqueous solution of potassium fluorotitanate with a concentration of 12%.
  • chassis aluminum alloy cavity castings-sub-frame parts the overall dimensions of the castings are 410 ⁇ 260 ⁇ 210mm, the alloy used is Salifont-36, the weight is 4.5kg, and the basic wall thickness is 4.5mm.
  • the sub-frame components of the vehicle chassis include its aluminum alloy cavity casting part (shown as the sub-frame in the dashed box in Figure 2a) and a foamed aluminum part filled in the cavity casting (such as Figure 2b shows the special-shaped aluminum foam filled in the sub-frame); the outer dimension of the filled aluminum foam is 220 ⁇ 330 ⁇ 130mm, the material is pure aluminum, the weight is 0.41kg, and the volume density is 0.2 ⁇ 0.4g/cm 3 .
  • Casting process low pressure casting.
  • Preparation of special-shaped aluminum foam firstly, pure aluminum powder and titanium hydride (0.5 to 1.5 wt% of the total weight) are thoroughly mixed uniformly, and then a powder pressing method is used to prepare a foamable precursor; The first foamed mold is preheated to about 700°C in the heating furnace; then, according to the shape of the special-shaped aluminum foam, several foamable precursors are put into the first mold according to the pre-designed positions; heat preservation 3 ⁇ After 5 minutes, take out the special-shaped aluminum foam and cool it quickly.
  • the cooling method is strong wind cooling or water mist cooling.
  • Pretreatment of aluminum alloy liquid refining, modifying and refining the aluminum liquid with qualified chemical composition, heating the aluminum alloy liquid to 660°C and keeping it warm for use.
  • Pretreatment of the second mold After preparing the cavity of the second mold, put it into a heating furnace and heat it evenly to 420°C. After taking it out, use an air gun to spray the dust on the surface of the cavity, and finally even on the surface of the cavity Spray paint, heat to 420°C, keep warm for later use.
  • Post-processing take out the casting, cut off the gate and riser, and perform processing, shot blasting and surface treatment according to the requirements of the product.
  • the foamed aluminum is a special-shaped closed-cell foamed aluminum
  • the matrix is industrial pure aluminum, which is directly foamed and formed by a powder method, the case thickness is 1.5mm, and the bulk density is 0.4g/mm 3 .
  • the flux is an aqueous solution of potassium fluorotitanate with a concentration of 10%.

Abstract

本申请公开了一种异形泡沫铝填充铝合金空腔铸件的制备方法。所述制备方法包括：采用粉末冶金发泡法在第一模具中制备得到异形泡沫铝；对所述异形泡沫铝涂覆助焊剂后固定在第二模具中，和用铝合金液进行铸造。本发明的异形泡沫铝填充铝合金空腔铸件的制备方法，能够在减小铸件的壁厚以满足铸件的整体质量不增加的同时，提高铸件的整体强度。

Description

一种异形泡沫铝填充铝合金空腔铸件的制备方法 技术领域
本发明属于铝合金铸造领域，具体涉及一种异形泡沫铝填充铝合金空腔铸件的制备方法。
背景技术
二十一世纪以来，在经济全球化和技术进步不断加快的背景下，世界汽车产业，尤其是我国汽车工业进入了高速发展时期，然而超大的汽车生产消费规模随之带来了严峻的能源安全态势与巨大的环境保护压力，这就决定了汽车工业必须走发展新能源汽车和实现汽车轻量化的道路。
目前比较实用的汽车轻量化主要通过三种方式实现，分别是材料轻量化、结构轻量化和制造工艺轻量化。铝合金材料以密度低、比强度高、抗蚀能力好、导热性能优良、易加工等特点，大量应用于汽车工业领域。而铝合金空腔铸件既能同时从材料和结构上实现轻量化，又能保持铸件的机械性能不降低。目前，铝合金空腔铸件的生产工艺为通过内置砂芯进行重力或低压铸造，进一步地，砂芯的制备工艺可分为有机制芯和无机制芯。有机制芯对环境的污染较大，会损害作业人员的身体健康，同时愈加严苛的环保要求进一步导致对环保设备的投资加大。而无机制芯虽然可以有效地降低对环境的污染，但是国内的无机制芯技术距离稳定的批量生产仍然存在较大的困难。无机制芯的核心技术掌握在欧美发达国家手中，进口相应的设备需要大量的投资，这样会提高铝合金空腔铸件的生产成本，使产品失去竞争力。
泡沫铝是一种在铝基体中均匀分布着大量连通或不连通孔洞的新型轻质多功能材料，是在纯铝或者铝合金中加入添加剂后，经过发泡工艺而成，同时兼有金属和发泡材料的性能。泡沫铝具有优异的物理性能(密度小、导热率低、 比表面积大)，化学性能(抗腐蚀、耐腐蚀性强)，力学性能(抗冲击、减震吸能、易加工)以及可回收性，特别是其轻质、抗震和吸能的特性。
然而，形状复杂的异形泡沫铝由于其存在更多的拐点和尖角，壁厚的变化更加多样化，因此，在铸造过程中会产生较大的填充阻力，极易形成冷隔、充不满的缺陷。
发明内容
有鉴于此，本发明的主要目的在于提供一种异形泡沫铝填充铝合金空腔铸件的制备方法，能够在减小铸件的壁厚以满足铸件的整体质量不增加的同时，提高铸件的整体强度。
本发明的第一方面提供一种异形泡沫铝填充铝合金空腔铸件的制备方法，所述制备方法包括：
采用粉末冶金发泡法在第一模具中制备得到异形泡沫铝；
对所述异形泡沫铝涂覆助焊剂后固定在第二模具中，和
用铝合金液进行铸造。
根据本发明的一种实施方式，采用粉末冶金发泡法在第一模具中制备得到异形泡沫铝的步骤包括：将纯铝粉与氢化钛混合均匀后，采用粉末压制法制备得到发泡前驱体；将数个所述发泡前驱体放入已预热的所述第一模具中进行发泡；保温后取出，进行冷却。
具体地，采用粉末冶金发泡法制备得到异形泡沫铝，首先，将纯铝粉与发泡剂进行混合，采用粉末压制法制备得到发泡前驱体；然后，将第一模具放入加热炉中进行预热至约700℃；随后，根据异形泡沫铝的形状，将数个发泡前驱体按照预先设计好的位置放入第一模具中；最后，保温3～5min后，取出异形泡沫铝进行快速冷却。
其中，所述发泡剂可为氢化钛或氢化锆，但不限于此。根据本发明的一个实例，所述发泡剂可为氢化钛，氢化钛的用量为总重的0.5～1.5wt％。所述发泡前驱体可制备成棒状或板状等较为规则的形状。将数个发泡前驱体放入第一模 具中，发泡剂在高温条件下分解，在熔融铝中形成气泡，即可制备得到近净成型的异形泡沫铝。同时，所述冷却可为强风冷却或水雾冷却。
根据本发明的一种实施方式，所述异形泡沫铝的等体积密度为0.2～0.4g/mm 3，表壳厚度为1～2mm。
一般按照孔结构，泡沫铝可分为闭孔泡沫铝和通孔泡沫铝，其中，闭孔泡沫铝的各孔互不相通，孔隙率在80％以上，孔径一般为2～5mm；而通孔泡沫铝的各孔相互连通，孔隙率在60～75％，孔径一般为0.8～2mm。本发明中所述异形泡沫铝为闭孔泡沫铝，所述异形泡沫铝的密度小，仅为0.2～0.4g/mm 3，同时兼有金属和气泡的性质，具备吸收冲击能力强，耐高温，防火性能强，抗腐蚀，隔音降噪，导热率低，电磁屏蔽性高，耐候性强和可回收性等优势。
并且，所述表壳是指在粉末冶金发泡法制备异形泡沫铝的过程中形成于异形泡沫铝表层的薄壳，实质上为铝熔体泡沫在冷却过程中凝固而形成的凝固层。将表壳的厚度限定为1～2mm，既有利于后续铸造过程中铝合金液的填充，又不至于填充时将异形泡沫铝重熔而导致坍塌。
具体地，本发明中采用异形泡沫铝填充铝合金空腔铸件，可使得铸件同时兼有铝合金空腔铸件和泡沫铝的优点，大幅提升铸件的整体强度。因此，可在保证铸件性能的前提条件下，减小铸件的壁厚，完全抵消异形泡沫铝的使用而带来的质量增加。
根据本发明的方法，所述第一模具和所述第二模具具有大体相同的结构，只是第一模具的尺寸小于第二模具。其中，根据设计的铝合金部件的壁厚来确定第一模具和第二模具之间的尺寸差异。
根据本发明的一种实施方式，对所述异形泡沫铝涂覆助焊剂的步骤包括：将异形泡沫铝浸入已加热至80～100℃的助焊剂中保持3～10min后取出，烘干后表面形成白霜状涂层，加热至500～600℃进行保温；优选地，所述助焊剂为氟钛酸钾水溶液，浓度为5～15％。
具体地，所述助焊剂的主要作用是保证所述异形泡沫铝与所述铝合金空腔铸件的焊接过程顺利进行。所述助焊剂可清除所述异形泡沫铝表面的氧化物， 使其表面达到必要的清洁度，同时可防止焊接时表面的再次氧化，降低其表面张力，提高焊接性能。由于异形泡沫铝的形状较为复杂，为了保证其表面能够全面地覆盖有助焊剂，将异形泡沫铝直接浸入助焊剂中。
助焊剂可大体上分为无机类、有机酸类和松香类，其中，本发明中所述助焊剂可为盐酸、氢氟酸、氟化钠、氟化钾、氯化锌、氟钛酸钾等无机酸或无机盐。根据本发明的一个实例，所述助焊剂可为氟钛酸钾水溶液，浓度可为5～15％，但不限于此。将异形泡沫铝浸入助焊剂中保持3～10min后取出，烘干后，氟钛酸钾覆盖在所述异形泡沫铝的表面，呈现为白霜状涂层，可以有效地隔绝空气。
根据本发明的一种实施方式，对所述异形泡沫铝涂覆助焊剂后固定在第二模具中的步骤包括：预先对所述第二模具加热至350～450℃，在所述第二模具的内表面喷涂一层涂料，将表面涂覆有助焊剂的异形泡沫铝放入所述第二模具中进行固定，且使所述模具合型到位。
具体地，预先对所述第二模具加热至350～450℃，一方面可以避免模具温度低，出现成型困难，铸件裂纹等缺陷；另一方面，可避免由于模具温度变化太大，冷热应力很大，造成模具损坏的情况。随后，可采用风枪喷净第二模具的型腔表面的灰尘，以避免铸造过程中在铸件的表面产生缺陷。
所喷涂的涂料是生产优质铸件必不可少的辅助原料，所述涂料的主要功能是保护金属模具，有利于铸件脱模，提高铸件表面的质量和控制热传递速率。提高铝合金铸件表面的质量，必须有效地控制所述铝合金液在所述模具内凝固的全过程，因此，第二模具内涂层最重要的作用是在模具内表面形成绝热层，控制高温铝合金液向所述模具的热传递速率。所述涂料通常以水作为载体，加入高温粘合剂和耐火材料配制而成，涂层厚度可为150～250μm。
根据本发明的一种实施方式，所述铸造步骤包括将温度为660～700℃的所述铝合金液倒入固定有所述异形泡沫铝的所述第二模具中。具体地，所述铝合金液可通过所述助焊剂与所述异形泡沫铝焊接牢固，即使在高温条件下，所述异形泡沫铝与所述铝合金空腔铸件之间也能紧密焊接；而所述涂料则有助于铝合金铸件脱模，保证其表面质量。进一步地，将所述异形泡沫铝填充铝合金空 腔铸件应用于汽车制造领域，例如，车底盘的转向节部件和副车架部件，即使在车辆长期运行振动的条件下，也能保证所述异形泡沫铝与所述铝合金空腔铸件之间焊接牢固。
具体地，所述铝合金液在铸造前需要依次进行熔化、精炼、成分调整、细化变质、测渣测氢和静置保温的过程。精炼是为了纯净所述铝合金液，除去所述铝合金液内的氧化铝渣和气体，从而避免铸件的缺陷。随后，成分调整前需要对所述铝合金液内的成分进行分析，可针对所需要的铝合金铸件对所述铝合金液的成分进行调整。细化变质则是向所述铝合金液中加入变质剂，形成大量分散的晶核，从而获得细小的铸造晶粒。由于所述铝合金液中氢含量偏高是铸件产生针孔的主要原因，如果能够控制所述铝合金液中的氢含量，就能够显著提高铝合金铸件的品质。因此，对所述铝合金液进行测渣测氢，可有效地控制所述铝合金液的质量。
本发明所用的铝合金无特别限制，可为车用部件常规使用的铝合金。举例来说，可为A356、ZL101、ZL102、ZL104等。
根据本发明的一种实施方式，所述制备方法还包括对铸件进行后处理的步骤。具体地，将所述铸件取出后，切除浇口、冒口，根据产品要求对铸件进行机加工、抛丸和表面处理。与传统的铝合金空腔铸件的铸造工艺相比较，省去了振砂、落砂、吹砂以及砂回收等工序，不仅缩短铸造的工艺流程，还降低了设备、人工和管理的成本，进一步提高生产效率。同时，将所述泡沫铝填充铝合金空腔铸件应用于汽车制造领域，对整车噪声、振动、声振粗糙度(NVH)性能的提升完全可以抵消增加泡沫铝而带来的成本提升。
根据本发明的一种实施方式，所述铸件的铝合金壁厚为4～8mm。
本发明的第二方面提供一种异形泡沫铝填充铝合金空腔铸件，通过本发明的第一方面所述的制备方法制备获得。具体地，所述铝合金空腔铸件可为车底盘的转向节部件或副车架部件，但不限于此。
本发明的异形泡沫铝填充铝合金空腔铸件，通过泡沫铝替代传统的砂芯，在满足轻量化要求的同时获得了更高的强度，进一步地，省去振砂、落砂、吹 砂以及砂回收等工序，提高了生产效率。
附图说明
图1为泡沫铝填充车底盘的转向节部件的结构示意图，其中，(a)为转向节，(b)为转向节中填充的异形泡沫铝；
图2为泡沫铝填充车底盘的副车架部件的结构示意图，其中，(a)为副车架，(b)为副车架中填充的异形泡沫铝。
具体实施方式
下面将结合本发明实施方式及附图，对本发明实施方式中的技术方案进行清楚、完整地描述，显然，所描述的实施方式仅仅是本发明的一部分实施方式，而不是全部的实施方式。基于本发明中的实施方式，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施方式，都属于本发明保护的范围。
以下参考附图所示的示意性的示例，进一步说明本发明。通过以下说明，本发明的各方面优点将更加明显。附图中相同的附图标记指代相同的部件。示意性附图中各部件的形状和尺寸仅用于示意，并不能被认为体现了实际的形状、尺寸和绝对的位置。
根据本发明的异形泡沫铝填充铝合金空腔铸件的制备方法大体包括以下步骤：
(1)异形泡沫铝的制备：首先，将纯铝粉与氢化钛混合均匀后，采用粉末压制法制备得到发泡前驱体；随后，将数个发泡前驱体放入已预热至约700℃的第一模具中进行发泡，保温3～5min后取出；最后，采用强风冷却或水雾冷却得到异形泡沫铝。
(2)异形泡沫铝的预处理：将上述制备得到的异形泡沫铝全部浸入已加热至80～100℃的助焊剂中，保持3～10min后取出，烘干后表面形成白霜状涂层；最后，将异形泡沫铝直接加热至500～600℃，保温待用。
(3)铝合金液的预处理：依次包括熔化、精炼、成分调整、细化变质和测渣测氢步骤；最后，将铝合金液保温于660～700℃待用。
(4)第二模具的预处理：将第二模具的型腔准备好后放入加热炉内均匀加热至350～450℃，取出后用风枪喷净型腔表面的灰尘；最后，在型腔表面均匀喷涂料，加热至350～450℃，保温待用。
(5)铸造成型：将准备好的异形泡沫铝放入预热好的第二模具中，模具合型到位，倒入已经预处理好的铝合金液进行铸造。
(6)后处理：取出铸件，切除浇口、冒口，根据产品的要求进行分机加工、抛丸处理和表面处理。
实施例一：
某款车底盘铝合金空腔铸件—转向节：铸件外形尺寸为550×160×240mm，所用合金为A356，重量4.25kg，基本壁厚6mm。如图1所示，其中，车底盘的转向节部件包括其铝合金空腔铸件部分(如图1a虚线框中所示为转向节)和在上述空腔铸件内部填充泡沫铝部分(如图1b所示为转向节中填充的异形泡沫铝)。所充填泡沫铝的外形尺寸为300×150×150mm，材料为纯铝，重量0.21kg，等体积密度为0.2～0.4g/cm 3。铸造工艺：低压铸造。
具体步骤为：
(1)异形泡沫铝的制备：首先，将纯铝粉与氢化钛(总重的0.5～1.5wt％)充分混合均匀后，采用粉末压制法制备得到可发泡前驱体；随后，将用于发泡的第一模具在加热炉中预热至700℃左右；然后，根据异形泡沫铝的形状，将数个可发泡前驱体按照事先设计好的位置放入第一模具中；保温3～5min后，取出异形泡沫铝快速冷却，冷却方式为强风冷却或水雾冷却。
(2)异形泡沫铝的预处理：将上述制备得到的异形泡沫铝全部浸入已加热至80～100℃的助焊剂中，保持5min后取出，烘干后表面形成白霜状涂层；最后，将异形泡沫铝直接加热至540℃，保温待用。
(3)铝合金液的预处理：对化学成分合格的铝液精炼、变质细化，将铝合金液加热至680℃，保温待用。
(4)第二模具的预处理：将第二模具的型腔准备好后放入加热炉内均匀加热至380℃，取出后用风枪喷净型腔表面的灰尘，最后在型腔表面均匀喷涂料，加热至380℃，保温待用。
(5)铸造成型：将已经预处理好的异形泡沫铝放入预热好的第二模具中，模具合型到位，倒入已经预处理好的铝合金液进行铸造。
(6)后处理：取出铸件，切除浇口、冒口，根据产品的要求进行分机加工、抛丸处理和表面处理。
上述铸造过程中，所述泡沫铝为异形闭孔泡沫铝，基体为工业纯铝，采用粉末法直接发泡成形，表壳厚度1.2mm，等体积密度为0.25g/mm 3。
进一步地，所述助焊剂为氟钛酸钾水溶液，浓度为12％。
实施例2
某款车底盘铝合金空腔铸件——副车架部件：铸件外形尺寸为410×260×210mm，所用合金为Salifont-36，重量4.5kg，基本壁厚4.5mm。如图2所示，其中，车底盘的副车架部件包括其铝合金空腔铸件部分(如图2a虚线框中所示为副车架)和在上述空腔铸件内部填充泡沫铝部分(如图2b所示为副车架中填充的异形泡沫铝)；所充填泡沫铝的外形尺寸为220×330×130mm，材料为纯铝，重量0.41kg，等体积密度为0.2～0.4g/cm 3。铸造工艺：低压铸造。
具体步骤为：
(1)异形泡沫铝的制备：首先，将纯铝粉与氢化钛(总重的0.5～1.5wt％)充分混合均匀后，采用粉末压制法制备得到可发泡前驱体；随后，将用于发泡的第一模具在加热炉中预热至700℃左右；然后，根据异形泡沫铝的形状，将数个可发泡前驱体按照事先设计好的位置放入第一模具中；保温3～5min后，取出异形泡沫铝快速冷却，冷却方式为强风冷却或水雾冷却。
(2)异形泡沫铝的预处理：将上述制备得到的异形泡沫铝全部浸入已加热至80～100℃的助焊剂中，保持8min后取出，烘干后表面形成白霜状涂层；最后，将异形泡沫铝直接加热至560℃，保温待用。
(3)铝合金液的预处理：对化学成分合格的铝液精炼、变质细化，将铝合 金液加热至660℃，保温待用。
(4)第二模具的预处理：将第二模具的型腔准备好后放入加热炉内均匀加热至420℃，取出后用风枪喷净型腔表面的灰尘，最后在型腔表面均匀喷涂料，加热至420℃，保温待用。
(5)铸造成型：将已经预处理好的异形泡沫铝放入预热好的第二模具中，模具合型到位，倒入已经预处理好的铝合金液进行铸造。
(6)后处理：取出铸件，切除浇口、冒口，根据产品的要求进行分机加工、抛丸处理和表面处理。
上述铸造过程中，所述泡沫铝为异形闭孔泡沫铝，基体为工业纯铝，采用粉末法直接发泡成形，表壳厚度1.5mm，等体积密度为0.4g/mm 3。
进一步地，所述助焊剂为氟钛酸钾水溶液，浓度为10％。
以上所述仅为本发明的优选实施方式，并非因此限制本发明的专利范围，凡是在本发明的发明构思下，利用本发明说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本发明的专利保护范围内。

Claims (10)

  1. 一种异形泡沫铝填充铝合金空腔铸件的制备方法，其特征在于，所述制备方法包括：
    采用粉末冶金发泡法在第一模具中制备得到异形泡沫铝；
    对所述异形泡沫铝涂覆助焊剂后固定在第二模具中，和
    用铝合金液进行铸造。
  2. 如权利要求1所述的制备方法，其特征在于，采用粉末冶金发泡法在第一模具中制备得到异形泡沫铝的步骤包括：将纯铝粉与氢化钛混合均匀后，采用粉末压制法制备得到发泡前驱体；将数个所述发泡前驱体放入已预热的所述第一模具中进行发泡；保温后取出，进行冷却。
  3. 如权利要求1所述的制备方法，其特征在于，所述异形泡沫铝的等体积密度为0.2～0.4g/mm 3，表壳厚度为1～2mm。
  4. 如权利要求1所述的制备方法，其特征在于，对所述异形泡沫铝涂覆助焊剂的步骤包括：将所述异形泡沫铝浸入已加热至80～100℃的助焊剂中保持3～10min后取出，烘干后加热至500～600℃进行保温；优选地，所述助焊剂为氟钛酸钾水溶液，浓度为5～15％。
  5. 如权利要求1～4中任一项所述的制备方法，其特征在于，对所述异形泡沫铝涂覆助焊剂后固定在第二模具中的步骤包括：预先对所述第二模具加热至350～450℃，在所述第二模具的内表面喷涂一层涂料，将表面涂覆有助焊剂的异形泡沫铝放入所述第二模具中进行固定，且使所述模具合型到位。
  6. 如权利要求1～4中任一项所述的制备方法，其特征在于，所述铸造步骤包括将温度为660～700℃的所述铝合金液倒入固定有所述异形泡沫铝的所述第二模具中。
  7. 如权利要求1～4中任一项所述的制备方法，其特征在于，所述制备方法还包括对所述铸件进行后处理的步骤。
  8. 如权利要求1～4中任一项所述的制备方法，其特征在于，所述铸件的铝 合金壁厚为4～8mm。
  9. 一种异形泡沫铝填充铝合金空腔铸件，其特征在于，所述异形泡沫铝填充铝合金空腔铸件通过如权利要求1～8中任一项所述的制备方法制备获得。
  10. 如权利要求9所述的异形泡沫铝填充铝合金空腔铸件，其特征在于，所述铝合金空腔铸件为车底盘的转向节部件或副车架部件。
PCT/CN2020/122015 2020-03-10 2020-10-20 一种异形泡沫铝填充铝合金空腔铸件的制备方法 WO2021179606A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US17/775,453 US20220395894A1 (en) 2020-03-10 2020-10-20 Preparation method for aluminum alloy cavity casting filled with special-shaped foamed aluminum
KR1020227011296A KR20220058609A (ko) 2020-03-10 2020-10-20 이형 알루미늄 폼이 충전된 중공형 알루미늄 합금 주물의 제조 방법

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010160906.5 2020-03-10
CN202010160906.5A CN111360259A (zh) 2020-03-10 2020-03-10 一种异形泡沫铝填充铝合金空腔铸件的制备方法

Publications (1)

Publication Number Publication Date
WO2021179606A1 true WO2021179606A1 (zh) 2021-09-16

Family

ID=71200371

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/122015 WO2021179606A1 (zh) 2020-03-10 2020-10-20 一种异形泡沫铝填充铝合金空腔铸件的制备方法

Country Status (4)

Country Link
US (1) US20220395894A1 (zh)
KR (1) KR20220058609A (zh)
CN (1) CN111360259A (zh)
WO (1) WO2021179606A1 (zh)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111360259A (zh) * 2020-03-10 2020-07-03 中信戴卡股份有限公司 一种异形泡沫铝填充铝合金空腔铸件的制备方法
CN111299549A (zh) * 2020-03-10 2020-06-19 中信戴卡股份有限公司 一种泡沫铝填充铝合金空腔铸件的制备方法
CN112122587A (zh) * 2020-08-06 2020-12-25 大连理工大学 一种金属泡沫材料-金属复合结构件及其制备方法
CN112122611B (zh) * 2020-09-25 2022-07-05 航天特种材料及工艺技术研究所 一种夹心结构的泡沫铝及其制备方法
CN112355239A (zh) * 2020-11-03 2021-02-12 中信戴卡股份有限公司 一种泡沫铝异形件制备方法
CN114226687B (zh) * 2021-12-23 2024-04-26 江苏文灿压铸有限公司 一种分体式砂芯成型的新能源汽车副车架制备方法

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10156513A (ja) * 1996-11-27 1998-06-16 Nhk Spring Co Ltd 鋳造用フィルタ
JP2004174584A (ja) * 2002-11-28 2004-06-24 Mazda Motor Corp 砂型、該砂型の製造方法、並びに該砂型を用いた鋳造方法
CN101773993A (zh) * 2009-01-13 2010-07-14 广东海洋大学 泡沫铝夹芯结构的制备方法
CN103540785A (zh) * 2013-11-04 2014-01-29 太原理工大学 一种镁铝金属间化合物增强泡沫铝的方法
CN206884960U (zh) * 2017-06-23 2018-01-16 姚广春 一种泡沫铝/纤维织布复合型汽车防撞梁
CN109014205A (zh) * 2018-08-23 2018-12-18 四会市亿和铝业有限公司 一种粉末冶金法制备泡沫铝材的方法
CN208291340U (zh) * 2018-05-07 2018-12-28 华南理工大学 一种轻质吸能车身结构
CN208517502U (zh) * 2018-06-01 2019-02-19 珠海格力电器股份有限公司 一种开孔泡沫铝导风板
CN109465424A (zh) * 2019-01-04 2019-03-15 宁波赛孚新材料科技有限公司 一种抗冲击吸能结构件制备方法及结构件
CN209410168U (zh) * 2018-07-25 2019-09-20 绿驰汽车科技集团有限公司 一种填充泡沫材料的汽车纵梁结构
CN111299549A (zh) * 2020-03-10 2020-06-19 中信戴卡股份有限公司 一种泡沫铝填充铝合金空腔铸件的制备方法
CN111360259A (zh) * 2020-03-10 2020-07-03 中信戴卡股份有限公司 一种异形泡沫铝填充铝合金空腔铸件的制备方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19501508C1 (de) * 1995-01-19 1996-04-25 Lemfoerder Metallwaren Ag Bauteil für das Fahrwerk eines Kraftfahrzeuges und Verfahren zur Herstellung eines solchen Bauteils
KR100584488B1 (ko) * 2003-03-21 2006-05-29 주식회사 성우하이텍 액상 발포 알루미늄을 이용한 차량용 범퍼 빔의 제작방법 및 이를 이용한 차량용 범퍼 빔
EP1468765A1 (en) * 2003-04-16 2004-10-20 Corus Technology BV Preform for foamed sheet product and foamed product manufactured therefrom
CN104550972B (zh) * 2014-12-05 2017-02-22 沈阳工业大学 一种泡沫铝异型件的制备方法
CN106222470B (zh) * 2016-09-14 2018-07-31 郑州峰泰纳米材料有限公司 一种泡沫铝合金的制备方法
CN109837415B (zh) * 2017-11-28 2020-10-20 有研工程技术研究院有限公司 一种泡沫铝合金的制造方法

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10156513A (ja) * 1996-11-27 1998-06-16 Nhk Spring Co Ltd 鋳造用フィルタ
JP2004174584A (ja) * 2002-11-28 2004-06-24 Mazda Motor Corp 砂型、該砂型の製造方法、並びに該砂型を用いた鋳造方法
CN101773993A (zh) * 2009-01-13 2010-07-14 广东海洋大学 泡沫铝夹芯结构的制备方法
CN103540785A (zh) * 2013-11-04 2014-01-29 太原理工大学 一种镁铝金属间化合物增强泡沫铝的方法
CN206884960U (zh) * 2017-06-23 2018-01-16 姚广春 一种泡沫铝/纤维织布复合型汽车防撞梁
CN208291340U (zh) * 2018-05-07 2018-12-28 华南理工大学 一种轻质吸能车身结构
CN208517502U (zh) * 2018-06-01 2019-02-19 珠海格力电器股份有限公司 一种开孔泡沫铝导风板
CN209410168U (zh) * 2018-07-25 2019-09-20 绿驰汽车科技集团有限公司 一种填充泡沫材料的汽车纵梁结构
CN109014205A (zh) * 2018-08-23 2018-12-18 四会市亿和铝业有限公司 一种粉末冶金法制备泡沫铝材的方法
CN109465424A (zh) * 2019-01-04 2019-03-15 宁波赛孚新材料科技有限公司 一种抗冲击吸能结构件制备方法及结构件
CN111299549A (zh) * 2020-03-10 2020-06-19 中信戴卡股份有限公司 一种泡沫铝填充铝合金空腔铸件的制备方法
CN111360259A (zh) * 2020-03-10 2020-07-03 中信戴卡股份有限公司 一种异形泡沫铝填充铝合金空腔铸件的制备方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Forming of Steel-Al20Sn Self-lubricating Plate", 31 March 2007, BEIJING JIAOTONG UNIVERSITY PRESS, Beijing, ISBN: 978-7-81082-953-3, article ZHANG, PENG: "Passage: Chapter 2 Composite Forming of Solid and Liquid Dip Plating", pages: 63 - 76, XP009530317 *

Also Published As

Publication number Publication date
US20220395894A1 (en) 2022-12-15
KR20220058609A (ko) 2022-05-09
CN111360259A (zh) 2020-07-03

Similar Documents

Publication Publication Date Title
WO2021179606A1 (zh) 一种异形泡沫铝填充铝合金空腔铸件的制备方法
WO2021179607A1 (zh) 一种泡沫铝填充铝合金空腔铸件的制备方法
US6915834B2 (en) Process for producing metal foam and metal body produced using this process
US11565310B2 (en) Preparation method of foamed aluminum special-shaped part
CN101524739A (zh) 一种熔模精密铸造方法
CN101658918A (zh) 水玻璃型镁合金熔模铸造工艺
CN105821263A (zh) 铝合金汽车转向器壳体及其超高速铸造制备方法
WO2017114066A1 (zh) 一种汽车发动机壳体的环保型制备方法
CN103589892A (zh) 一种低密度小孔径粉末冶金法泡沫铝复合结构的制备方法
CN110834063A (zh) 一种铝锂合金铸件的砂型铸造工艺
CN109365749A (zh) 熔模精密制造真空热成形生产工艺
CN111496185A (zh) 一种消失模铸造铸件生产工艺
CN105537526A (zh) 一种阻燃保温冒口的成型方法
CN116000265A (zh) 一种基于半固态成形技术的冷冻砂型铸造成形方法
CN103433466A (zh) 一种起动机外壳铝合金液态模锻的模具及复合成形方法
CN110834069A (zh) 一种砂型铸造方法
CN107891125B (zh) 汽车调节器模具型芯制造方法
CN112439869A (zh) 一种铸造用型砂制备方法
CN108465777B (zh) 一种新能源全铝车身用倾转重力砂芯铸造ab柱工艺
CN110834064A (zh) 一种镁锂合金铸件的砂型铸造工艺
CN114273638A (zh) 一种镁合金薄壁壳体件的低压精密铸造方法
CN112296248A (zh) 一种易溃散覆膜砂及其制备方法
CN114558991B (zh) 熔模铸造制备闭孔泡沫铝异形件的方法
CN104741529A (zh) 汽车耐热钢排气歧管熔模铸造方法
CN116786765B (zh) 一种坭芯结构及其制备方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20924485

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 20227011296

Country of ref document: KR

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20924485

Country of ref document: EP

Kind code of ref document: A1