CN103710594A - Method for preparing aluminum alloy sections for car bumpers - Google Patents

Method for preparing aluminum alloy sections for car bumpers Download PDF

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Publication number
CN103710594A
CN103710594A CN201310688381.2A CN201310688381A CN103710594A CN 103710594 A CN103710594 A CN 103710594A CN 201310688381 A CN201310688381 A CN 201310688381A CN 103710594 A CN103710594 A CN 103710594A
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insulation
cooled
warming
temperature
room temperature
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CN201310688381.2A
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Chinese (zh)
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吴贤春
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芜湖万润机械有限责任公司
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Publication of CN103710594A publication Critical patent/CN103710594A/en

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Abstract

The invention discloses a method for preparing aluminum alloy sections for car bumpers. The aluminum alloy sections are composed of the following elements in percentage by mass: 5.2-6.8% of Zn, 2.4-3.2% of Mg, 1.1-1.7% of Mn, 0.4-0.8% of Cr,0.2-0.5% of Si, 0.1-0.3% of Fe, 0.05-0.15% of Cu, 0.3-0.6% of Ni, 0.25-0.45% of Mo, 0.15-0.35% of Nb, 0.05-0.1% of Ti, 0.04-0.08% of Zr, 0.03-0.06% of In, 0.02-0.04% of Pm, 0.01-0.03% of Dy and the balance of Al. The aluminum alloy sections prepared by the invention are excellent in comprehensive mechanical properties, high in tensile strength, good in touchiness, good in thermal stability, good in fatigue resistance, good in abrasion resistance and excellent in processing and molding performance; and the aluminum alloy sections can be used for manufacturing high-grade car bumpers with high safety coefficients and good durability.

Description

The preparation method of aluminium alloy extrusions for a kind of car bumper

Technical field

The present invention relates to the preparation method of aluminium alloy extrusions for a kind of car bumper, belong to aluminum alloy materials processing technique field.

Background technology

Aluminium alloy is a most widely used class non-ferrous metal structured material in industry, because of its density low, strength ratio is higher, approach or surpass high-quality steel, plasticity is good, there is the performances such as good electroconductibility, thermal conductivity, corrosion stability, can be processed into various section bars, be widely used in the aspects such as machinofacture, Transport Machinery, power machine and aircraft industry.

Some at present domestic car aluminum alloy bumper tensile strength are low, cannot reach international standards, and cause car safety coefficient lower.

Summary of the invention

The object of the present invention is to provide a kind of preparation method of aluminium alloy extrusions for the car bumper of higher tensile strength that has.

For achieving the above object, the present invention adopts following technical scheme:

A preparation method for aluminium alloy extrusions for car bumper, comprises the following steps:

(1) according to element mass percent, meet following requirement: Zn 5.2-6.8, Mg 2.4-3.2, Mn 1.1-1.7, Cr 0.4-0.8, Si 0.2-0.5, Fe 0.1-0.3, Cu 0.05-0.15, Ni 0.3-0.6, Mo 0.25-0.45, Nb 0.15-0.25, Ti 0.05-0.1, Zr 0.04-0.08, In 0.03-0.06, Pm 0.02-0.04, Dy 0.01-0.03, surplus is that Al prepares burden, furnace charge is dropped into smelting furnace and at 745-765 ℃, carry out melting, add and treat that furnace charge all melts, stir 25-35min, detect alloying constituent and adjust; Then add refining agent to carry out refining, refining temperature is 720-740 ℃, refining time is 15-25min, standing 20-30min after skimming, adjust again temperature to 715-735 ℃, logical 60%Ar+40%CO Diversity gas refinery by de-gassing 15-25min in aluminium liquid, gaseous tension is 0.18-0.24atm, gas flow is 1.6-2.2 m 3/ min, standing 25-30min, fully floats oxidation sludge, starts casting after skimming;

(2) adopt metal mold water-cooled semicontinuous casting technology, aluminium liquid tapping temperature is 705-725 ℃, and casting temp is 690-710 ℃, casting speed is 90-110 mm/min, cooling water pressure is 0.3-0.4MPa, and cooling water intake temperature is not higher than 25 ℃, and water outlet water temperature is not higher than 45 ℃;

(3) strand is carried out to homogenizing processing: first with 160-220 ℃/h, be warming up to 380-420 ℃, insulation 4-6h, with 100-150 ℃/h, be cooled to 160-190 ℃ again, insulation 1-2h, then putting into 0-5 ℃ of icy salt solution is cooled to below 50 ℃, take out section bar and be warming up to 460-490 ℃ with 200-250 ℃/h, insulation 5-8h, high wind is air-cooled to 220-240 ℃, insulation 2-3h, then with 100-150 ℃/h, be warming up to 480-510 ℃, insulation 8-12h, with 80-120 ℃/h, be cooled to 280-320 ℃ again, insulation 3-5h, with 50-70 ℃/h, be cooled to 150-180 ℃ again, insulation 1-2h, air cooling is to room temperature,

(4) ingot casting after homogenizing processing is heated to 455-475 ℃, then utilizes extrusion machine that the ingot casting after preheating is put into mould extrusion moulding, mold preheating temperature is 430-460 ℃, container preheating temperature 420-440 ℃, and extruding rate is 15-20m/min;

(5) the above-mentioned aluminium alloy extrusions squeezing out adopts online air-cooled or water smoke Cooling Quenching, after press quenching, carry out ageing treatment: first with 85-95 ℃/h, be warming up to 175-195 ℃, insulation 5-10h, with 40-50 ℃/h, be cooled to 70-90 ℃ again, insulation 12-18h, with 30-40 ℃/h, be warming up to 160-180 ℃ again, insulation 8-12h, air cooling is warming up to 95-105 ℃ with 50-60 ℃/h to room temperature, insulation 10-15h, with 30-40 ℃/h, be warming up to 170-190 ℃ again, insulation 5-10h, air cooling is warming up to 190-210 ℃ with 95-105 ℃/h to room temperature, insulation 4-8h, with 50-60 ℃/h, be cooled to 80-100 ℃ again, insulation 10-15h, air cooling is to room temperature, through surface treatment, finishing, inspect for acceptance, packing gets product.

Described refining agent preparation method is as follows: a. takes the raw material of following weight part: magnesium chloride 10-15, Repone K 15-20, blast-furnace slag 4-8, volcanic ash 5-10, fluorite 3-6, bitter water chestnut soil 4-8, useless brick powder 3-6, Graphite Powder 99 2-5, rhombspar 8-12, manganese sulfide 2-3, nano aluminium oxide 2-3, vinyltriethoxysilane 0.5-1, trolamine 1-2; B. fluorite, bitter water chestnut soil, rhombspar are mixed, 730-760 ℃ of calcining 2-3h, being cooled to and putting into concentration after room temperature is that the hydrochloric acid soln of 15-20% soaks 1-2h, takes out and is washed with distilled water to neutrality, dry, 1200-1250 ℃ of calcining 1-2h, is cooled to room temperature, pulverizes, crossing 100-150 mesh sieve mixes with blast-furnace slag, volcanic ash, useless brick powder, Graphite Powder 99, then add vinyltriethoxysilane and trolamine, 2000-3000rpm speed lapping 10-15min, stand-by; C. magnesium chloride and Repone K are mixed, be heated to 780-810 ℃, after its whole meltings, the powder that adds all the other raw materials and step b to make, stirs 20-30min, and air prilling, obtains refining agent.

Beneficial effect of the present invention:

The aluminium alloy extrusions comprehensive mechanical property that the present invention makes is excellent, has higher tensile strength, good toughness, and Heat stability is good, fatigue resistance is good, and wear resistance is good, has good processing and processability; Can be for making sedan limousine collision bumper, safety coefficient is high, durable in use.

Embodiment

A preparation method for aluminium alloy extrusions for car bumper, comprises the following steps:

(1) according to element mass percent, meet following requirement: Zn 5.2-6.8, Mg 2.4-3.2, Mn 1.1-1.7, Cr 0.4-0.8, Si 0.2-0.5, Fe 0.1-0.3, Cu 0.05-0.15, Ni 0.3-0.6, Mo 0.25-0.45, Nb 0.15-0.25, Ti 0.05-0.1, Zr 0.04-0.08, In 0.03-0.06, Pm 0.02-0.04, Dy 0.01-0.03, surplus is that Al prepares burden, furnace charge is dropped into smelting furnace and at 755 ℃, carry out melting, add and treat that furnace charge all melts, stir 30min, detect alloying constituent and adjust; Then add refining agent to carry out refining, refining temperature is 730 ℃, and refining time is 20min, standing 25min after skimming, then adjust temperature to 720 ℃, logical 60%Ar+40%CO Diversity gas refinery by de-gassing 20min in aluminium liquid, gaseous tension is 0.22atm, and gas flow is 2.0 m 3/ min, standing 25min, fully floats oxidation sludge, starts casting after skimming;

(2) adopt metal mold water-cooled semicontinuous casting technology, aluminium liquid tapping temperature is 710 ℃, and casting temp is 695 ℃, and casting speed is 110 mm/min, and cooling water pressure is 0.3MPa, and cooling water intake temperature is not higher than 25 ℃, and water outlet water temperature is not higher than 45 ℃;

(3) strand is carried out to homogenizing processing: first with 220 ℃/h, be warming up to 420 ℃, insulation 4h, then be cooled to 180 ℃ with 150 ℃/h, insulation 1h, then puts into 3 ℃ of icy salt solutions and is cooled to below 50 ℃, takes out section bar and is warming up to 485 ℃ with 250 ℃/h, insulation 6h, high wind is air-cooled to 240 ℃, insulation 2h, then with 150 ℃/h, be warming up to 510 ℃, insulation 8h, then be cooled to 280 ℃ with 120 ℃/h, insulation 4h, with 60 ℃/h, be cooled to 170 ℃ again, insulation 1h, air cooling is to room temperature;

(4) ingot casting after homogenizing processing is heated to 460 ℃, then utilizes extrusion machine that the ingot casting after preheating is put into mould extrusion moulding, mold preheating temperature is 445 ℃, 430 ℃ of container preheating temperatures, and extruding rate is 18m/min;

(5) the above-mentioned aluminium alloy extrusions squeezing out adopts online air-cooled or water smoke Cooling Quenching, after press quenching, carry out ageing treatment: first with 90 ℃/h, be warming up to 185 ℃, insulation 8h, with 45 ℃/h, be cooled to 80 ℃ again, insulation 16h, with 35 ℃/h, be warming up to 165 ℃ again, insulation 12h, air cooling is warming up to 105 ℃ with 55 ℃/h to room temperature, insulation 10h, with 30 ℃/h, be warming up to 180 ℃ again, insulation 10h, air cooling is warming up to 205 ℃ with 100 ℃/h to room temperature, insulation 6h, with 60 ℃/h, be cooled to 90 ℃ again, insulation 12h, air cooling is to room temperature, through surface treatment, finishing, inspect for acceptance, packing gets product.

Described refining agent preparation method is as follows: a. takes the raw material of following weight (kg): magnesium chloride 10, Repone K 15, blast-furnace slag 5, volcanic ash 7, fluorite 4, bitter water chestnut soil 5, useless brick powder 4, Graphite Powder 99 3, rhombspar 10, manganese sulfide 2, nano aluminium oxide 2, vinyltriethoxysilane 0.5, trolamine 1; B. fluorite, bitter water chestnut soil, rhombspar are mixed, 740 ℃ of calcining 3h, being cooled to and putting into concentration after room temperature is that 15% hydrochloric acid soln soaks 2h, takes out and is washed with distilled water to neutrality, dry, 12250 ℃ of calcining 2h, are cooled to room temperature, pulverize, crossing 150 mesh sieves mixes with blast-furnace slag, volcanic ash, useless brick powder, Graphite Powder 99, then add vinyltriethoxysilane and trolamine, 3000rpm speed lapping 10min, stand-by; C. magnesium chloride and Repone K are mixed, be heated to 790 ℃, after its whole meltings, the powder that adds all the other raw materials and step b to make, stirs 20min, and air prilling, obtains refining agent.

The aluminium alloy extrusions of gained through check mechanical property is: tensile strength 451Mpa, and yield strength is 336Mpa, elongation is 17.4%.

Claims (2)

1. the preparation method of aluminium alloy extrusions for car bumper, is characterized in that comprising the following steps:
(1) according to element mass percent, meet following requirement: Zn 5.2-6.8, Mg 2.4-3.2, Mn 1.1-1.7, Cr 0.4-0.8, Si 0.2-0.5, Fe 0.1-0.3, Cu 0.05-0.15, Ni 0.3-0.6, Mo 0.25-0.45, Nb 0.15-0.25, Ti 0.05-0.1, Zr 0.04-0.08, In 0.03-0.06, Pm 0.02-0.04, Dy 0.01-0.03, surplus is that Al prepares burden, furnace charge is dropped into smelting furnace and at 745-765 ℃, carry out melting, add and treat that furnace charge all melts, stir 25-35min, detect alloying constituent and adjust; Then add refining agent to carry out refining, refining temperature is 720-740 ℃, refining time is 15-25min, standing 20-30min after skimming, adjust again temperature to 715-735 ℃, logical 60%Ar+40%CO Diversity gas refinery by de-gassing 15-25min in aluminium liquid, gaseous tension is 0.18-0.24atm, gas flow is 1.6-2.2 m 3/ min, standing 25-30min, fully floats oxidation sludge, starts casting after skimming;
(2) adopt metal mold water-cooled semicontinuous casting technology, aluminium liquid tapping temperature is 705-725 ℃, and casting temp is 690-710 ℃, casting speed is 90-110 mm/min, cooling water pressure is 0.3-0.4MPa, and cooling water intake temperature is not higher than 25 ℃, and water outlet water temperature is not higher than 45 ℃;
(3) strand is carried out to homogenizing processing: first with 160-220 ℃/h, be warming up to 380-420 ℃, insulation 4-6h, with 100-150 ℃/h, be cooled to 160-190 ℃ again, insulation 1-2h, then putting into 0-5 ℃ of icy salt solution is cooled to below 50 ℃, take out section bar and be warming up to 460-490 ℃ with 200-250 ℃/h, insulation 5-8h, high wind is air-cooled to 220-240 ℃, insulation 2-3h, then with 100-150 ℃/h, be warming up to 480-510 ℃, insulation 8-12h, with 80-120 ℃/h, be cooled to 280-320 ℃ again, insulation 3-5h, with 50-70 ℃/h, be cooled to 150-180 ℃ again, insulation 1-2h, air cooling is to room temperature,
(4) ingot casting after homogenizing processing is heated to 455-475 ℃, then utilizes extrusion machine that the ingot casting after preheating is put into mould extrusion moulding, mold preheating temperature is 430-460 ℃, container preheating temperature 420-440 ℃, and extruding rate is 15-20m/min;
(5) the above-mentioned aluminium alloy extrusions squeezing out adopts online air-cooled or water smoke Cooling Quenching, after press quenching, carry out ageing treatment: first with 85-95 ℃/h, be warming up to 175-195 ℃, insulation 5-10h, with 40-50 ℃/h, be cooled to 70-90 ℃ again, insulation 12-18h, with 30-40 ℃/h, be warming up to 160-180 ℃ again, insulation 8-12h, air cooling is warming up to 95-105 ℃ with 50-60 ℃/h to room temperature, insulation 10-15h, with 30-40 ℃/h, be warming up to 170-190 ℃ again, insulation 5-10h, air cooling is warming up to 190-210 ℃ with 95-105 ℃/h to room temperature, insulation 4-8h, with 50-60 ℃/h, be cooled to 80-100 ℃ again, insulation 10-15h, air cooling is to room temperature, through surface treatment, finishing, inspect for acceptance, packing gets product.
2. the preparation method of aluminium alloy extrusions for car bumper according to claim 1, it is characterized in that, described refining agent preparation method is as follows: a. takes the raw material of following weight part: magnesium chloride 10-15, Repone K 15-20, blast-furnace slag 4-8, volcanic ash 5-10, fluorite 3-6, bitter water chestnut soil 4-8, useless brick powder 3-6, Graphite Powder 99 2-5, rhombspar 8-12, manganese sulfide 2-3, nano aluminium oxide 2-3, vinyltriethoxysilane 0.5-1, trolamine 1-2; B. fluorite, bitter water chestnut soil, rhombspar are mixed, 730-760 ℃ of calcining 2-3h, being cooled to and putting into concentration after room temperature is that the hydrochloric acid soln of 15-20% soaks 1-2h, takes out and is washed with distilled water to neutrality, dry, 1200-1250 ℃ of calcining 1-2h, is cooled to room temperature, pulverizes, crossing 100-150 mesh sieve mixes with blast-furnace slag, volcanic ash, useless brick powder, Graphite Powder 99, then add vinyltriethoxysilane and trolamine, 2000-3000rpm speed lapping 10-15min, stand-by; C. magnesium chloride and Repone K are mixed, be heated to 780-810 ℃, after its whole meltings, the powder that adds all the other raw materials and step b to make, stirs 20-30min, and air prilling, obtains refining agent.
CN201310688381.2A 2013-12-17 2013-12-17 Method for preparing aluminum alloy sections for car bumpers CN103710594A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104975212A (en) * 2015-07-17 2015-10-14 东北轻合金有限责任公司 Method for manufacturing large high-strength aluminum alloy slab ingot
CN105886851A (en) * 2016-06-27 2016-08-24 肥西县碧涛建材有限公司 Aluminum alloy for decoration and production process thereof
CN106086551A (en) * 2016-07-25 2016-11-09 慈溪市宜美佳铝业有限公司 A kind of bumper high-intensity high-tenacity aluminium alloy extrusions and preparation method thereof
CN106636988A (en) * 2016-12-16 2017-05-10 安徽宝恒新材料科技有限公司 Fireproof aluminum alloy

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09268342A (en) * 1996-04-02 1997-10-14 Aisin Keikinzoku Kk High strength aluminum alloy
CN102489973A (en) * 2011-12-23 2012-06-13 东北轻合金有限责任公司 Method for manufacturing aluminum alloy hollow section for sedan bumper
CN102676962A (en) * 2011-03-16 2012-09-19 株式会社神户制钢所 Method for manufacturing an extruded material of heat treatment type Al-Zn-Mg series aluminum alloy
CN102943193A (en) * 2012-12-11 2013-02-27 丛林集团有限公司 Grain refinement machining process of hard aluminium alloy cast ingot
CN102965553A (en) * 2012-12-11 2013-03-13 丛林集团有限公司 Aluminum alloy cast ingot for automotive bumper and production process thereof
CN102978488A (en) * 2012-12-11 2013-03-20 丛林集团有限公司 Production technology of aluminum alloy sectional bar for automobile bumper

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09268342A (en) * 1996-04-02 1997-10-14 Aisin Keikinzoku Kk High strength aluminum alloy
CN102676962A (en) * 2011-03-16 2012-09-19 株式会社神户制钢所 Method for manufacturing an extruded material of heat treatment type Al-Zn-Mg series aluminum alloy
CN102489973A (en) * 2011-12-23 2012-06-13 东北轻合金有限责任公司 Method for manufacturing aluminum alloy hollow section for sedan bumper
CN102943193A (en) * 2012-12-11 2013-02-27 丛林集团有限公司 Grain refinement machining process of hard aluminium alloy cast ingot
CN102965553A (en) * 2012-12-11 2013-03-13 丛林集团有限公司 Aluminum alloy cast ingot for automotive bumper and production process thereof
CN102978488A (en) * 2012-12-11 2013-03-20 丛林集团有限公司 Production technology of aluminum alloy sectional bar for automobile bumper

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104975212A (en) * 2015-07-17 2015-10-14 东北轻合金有限责任公司 Method for manufacturing large high-strength aluminum alloy slab ingot
CN104975212B (en) * 2015-07-17 2017-03-22 东北轻合金有限责任公司 Method for manufacturing large high-strength aluminum alloy slab ingot
CN105886851A (en) * 2016-06-27 2016-08-24 肥西县碧涛建材有限公司 Aluminum alloy for decoration and production process thereof
CN106086551A (en) * 2016-07-25 2016-11-09 慈溪市宜美佳铝业有限公司 A kind of bumper high-intensity high-tenacity aluminium alloy extrusions and preparation method thereof
CN106086551B (en) * 2016-07-25 2018-09-25 慈溪市宜美佳铝业有限公司 A kind of bumper high-intensity and high-tenacity aluminium alloy extrusions and preparation method thereof
CN106636988A (en) * 2016-12-16 2017-05-10 安徽宝恒新材料科技有限公司 Fireproof aluminum alloy

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