CN112853176A - High-strength aluminum alloy for automobile transmission shaft and preparation method thereof - Google Patents

High-strength aluminum alloy for automobile transmission shaft and preparation method thereof Download PDF

Info

Publication number
CN112853176A
CN112853176A CN202110024825.7A CN202110024825A CN112853176A CN 112853176 A CN112853176 A CN 112853176A CN 202110024825 A CN202110024825 A CN 202110024825A CN 112853176 A CN112853176 A CN 112853176A
Authority
CN
China
Prior art keywords
aluminum alloy
transmission shaft
automobile transmission
strength aluminum
alloy
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN202110024825.7A
Other languages
Chinese (zh)
Inventor
杨靖
曹广然
李彦超
姚佳奇
张智
庞广鑫
***
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HARBIN ZHONGFEI NEW TECHNOLOGY CO LTD
Original Assignee
HARBIN ZHONGFEI NEW TECHNOLOGY CO LTD
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 HARBIN ZHONGFEI NEW TECHNOLOGY CO LTD filed Critical HARBIN ZHONGFEI NEW TECHNOLOGY CO LTD
Priority to CN202110024825.7A priority Critical patent/CN112853176A/en
Publication of CN112853176A publication Critical patent/CN112853176A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
    • C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/001—Extruding metal; Impact extrusion to improve the material properties, e.g. lateral extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/20—Making uncoated products by backward extrusion
    • 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
    • C22C1/02—Making non-ferrous alloys by melting
    • C22C1/026—Alloys based on aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Details Of Gearings (AREA)

Abstract

A high-strength aluminum alloy for an automobile transmission shaft and a preparation method thereof belong to the technical field of high-strength aluminum alloy preparation. The high-strength aluminum alloy for the automobile transmission shaft comprises 1.0-1.5 wt% of Si, 0.3 wt% of Fe, 0.6-1.1 wt% of Cu, 0.4-1.0 wt% of Mn, 1.2-1.8 wt% of Mg, 0.2 wt% of Cr, 0.3-0.7 wt% of Zn, 0.04-0.08 wt% of Ti, 0.1-0.2 wt% of Zr and the balance of Al. The process flow of the invention is raw material preparation → smelting → deslagging → component test → component adjustment → down furnace → solid-gas double-stage refining → standing → online grain refinement → online degassing → online deslagging → casting → homogenization treatment → extrusion → quenching → aging. The invention meets the mechanical index required by the aluminum alloy for the automobile transmission shaft.

Description

High-strength aluminum alloy for automobile transmission shaft and preparation method thereof
Technical Field
The invention belongs to the technical field of high-strength aluminum alloy preparation; in particular to a high-strength aluminum alloy for an automobile transmission shaft and a preparation method thereof.
Background
With the continuous progress of society, the living standard of people is also continuously improved, the demand and the requirement of automobiles are increased more than before, and with the policy of forcing automobile manufacturers to reduce the oil consumption of automobiles, the light weight of automobiles becomes an important breakthrough for large enterprises. Along with the development of lightweight research, the difficulty is higher and higher, and the core component of the automobile is closer and closer.
The automobile transmission shaft mainly supports the revolving body and transmits power in an open environment. The materials should have the following properties: sufficient strength, rigidity and toughness, good wear resistance, corrosion resistance and processability, namely good comprehensive performance. The shaft parts commonly used for automobiles are made of 35, 45 and 50 high-quality carbon steel, and 45 steel is most widely used. The 45 steel tensile strength is more than or equal to 600MPa, the yield strength is more than or equal to 355MPa, and the elongation is more than or equal to 16 percent according to the standard of GB/T699-2015 high-quality carbon structural steel.
Among various aluminum alloys, 1 series aluminum alloy and 3 series aluminum alloy have lower strength, 5 series aluminum alloy has lower yield strength, and the 2 series aluminum alloy has high strength but poor corrosion resistance, and the 7 series aluminum alloy has high strength, good corrosion resistance and lower plasticity without consideration. The 6 series aluminum alloy has medium strength, good corrosion resistance, no stress corrosion cracking tendency, good welding performance, unchanged welding area corrosion performance, good formability and technological performance, and only slightly low strength, so the 6 series aluminum alloy is optimized to improve the strength and is very feasible to replace steel materials as an automobile transmission shaft.
Disclosure of Invention
The invention aims to provide a high-strength aluminum alloy for an automobile transmission shaft and a preparation method thereof.
The invention is realized by the following technical scheme:
the high-strength aluminum alloy for the automobile transmission shaft comprises 1.0-1.5 wt% of Si, 0.3 wt% of Fe, 0.6-1.1 wt% of Cu, 0.4-1.0 wt% of Mn, 1.2-1.8 wt% of Mg, 0.2 wt% of Cr, 0.3-0.7 wt% of Zn, 0.04-0.08 wt% of Ti, 0.1-0.2 wt% of Zr and the balance of Al.
The high-strength aluminum alloy for the automobile transmission shaft is prepared from 1.2 wt% of Si, 0.3 wt% of Fe, 0.8 wt% of Cu, 0.5 wt% of Mn, 1.5 wt% of Mg, 0.2 wt% of Cr, 0.4 wt% of Zn, 0.06 wt% of Ti, 0.15 wt% of Zr and the balance of Al.
The high-strength aluminum alloy for the automobile transmission shaft is prepared from 1.0 wt% of Si, 0.3 wt% of Fe, 0.6 wt% of Cu, 0.4 wt% of Mn, 1.2 wt% of Mg, 0.2 wt% of Cr, 0.3 wt% of Zn, 0.04 wt% of Ti, 0.1 wt% of Zr and the balance of Al.
The high-strength aluminum alloy for the automobile transmission shaft is prepared from 1.5 wt% of Si, 0.3 wt% of Fe, 1.1 wt% of Cu, 1.0 wt% of Mn, 1.8 wt% of Mg, 0.2 wt% of Cr, 0.7 wt% of Zn, 0.08 wt% of Ti, 0.2 wt% of Zr and the balance of Al.
The invention relates to a preparation method of a high-strength aluminum alloy for an automobile transmission shaft, which comprises the following process flows of raw material preparation → smelting → deslagging → composition test → composition adjustment → down furnace → solid-gas two-stage refining → standing → online grain refinement → online degassing → online deslagging → casting → homogenization treatment → extrusion → quenching → aging.
According to the preparation method of the high-strength aluminum alloy for the automobile transmission shaft, the extrusion step after homogenization treatment is to heat the alloy to 480-540 ℃, and then extrude the alloy on a 75MN reverse extruder at the extrusion temperature of 460-480 ℃ and the extrusion speed of 2.0 mm/s.
According to the preparation method of the high-strength aluminum alloy for the automobile transmission shaft, the quenching step after extrusion is to put the alloy in a quenching furnace at 530-550 ℃ for heat preservation for 240-300 min for solution treatment.
According to the preparation method of the high-strength aluminum alloy for the automobile transmission shaft, the aging step after quenching is to perform aging on the aluminum alloy within the range of 150-170 ℃ for 720 min.
The high-strength aluminum alloy for the automobile transmission shaft, provided by the invention, is characterized in that Si and Mg form Mg2Si phase, Mg2Si phase is used as a main strengthening phase of the 6-series alloy, and the ratio of Mg to Si is 2: 1, and fixing Mg2The content of the Si phase is increased, and the alloy strengthening effect and the elongation are improved; and the maximum value of the tensile strength of the Al-Mg-Si alloy ternary alloy is positioned in the alpha (Al) -Mg2Si-Si three-phase region, and the alpha (Al) -Mg2In the Si-Si three-phase region, the alloy with the components of 1.2-2.0% of Si and 0.8-2.0% of Mg has smaller welding crack tendency.
According to the high-strength aluminum alloy for the automobile transmission shaft, after Cu is added into the Al-Mg-Si alloy, the existence form of the Cu in the structure is not only dependent on the content of the Cu, but also influenced by the contents of Mg and Si. When the Cu content is large and the ratio of Mg to Si is less than 1.08, w (Al) may be formed4CuMg5Si4) Phase, the remaining Cu forms CuAl2(ii) a When the ratio of Mg to Si is more than 1.73, S (Al) may be formed2CuMg) and CuAl2And (4) phase(s). w phase, S phase, CuAl2Phase and Mg2Different Si phase, only partial dissolution in solid state participates in strengthening, and the strengthening effect is not as good as that of Mg2The Si phase is large, but the Cu is added into the alloy, so that the plasticity of the alloy in hot processing is obviously improved, the heat treatment strengthening effect is increased, the extrusion effect can be inhibited, and the anisotropy of the alloy after Mn is added is reduced.
According to the high-strength aluminum alloy for the automobile transmission shaft, Mn is added into the alloy, so that the strength can be improved, and the corrosion resistance, the impact toughness and the bending property can be improved. However, Mn produces serious intracrystalline segregation in the alpha phase, which affects the recrystallization process of the alloy and causes coarsening of the crystal grains of the product.
According to the high-strength aluminum alloy for the automobile transmission shaft, Zr is added in the alloy to refine grains, so that the weldability of the alloy can be obviously improved in an Al-Zn-Mg series alloy, welding cracks can be obviously reduced when 0.2% of Zr is added, 0.1% -0.2% of Zr is added in an Al-Zn-Mg alloy containing Mn, and the stress corrosion resistance of the alloy can also be improved.
According to the high-strength aluminum alloy for the automobile transmission shaft, Ti is added into the alloy, so that crystal grains of the alloy in an as-cast state can be refined, the weldability of the alloy can be improved, and the effect is lower than that of Zr. The effect of adding Ti and Zr simultaneously is better.
According to the high-strength aluminum alloy for the automobile transmission shaft, the content of Fe and Cr impurity elements in the alloy is reduced by optimizing the alloy, and the damage to the alloy strength and the corrosion resistance is reduced. The addition amount of each element in the optimized alloy is low, the concentration of the formed solid solution is low, the decomposition tendency of the solid solution can be reduced, and the heat resistance and the corrosion resistance of the optimized alloy are improved.
According to the high-strength aluminum alloy for the automobile transmission shaft, the optimized mechanical property of the alloy reaches that the tensile strength is more than or equal to 450MPa, the yield strength is more than or equal to 420MPa, the elongation is more than or equal to 11%, and the mechanical index required by the aluminum alloy for the automobile transmission shaft is met; the corrosion rate is reduced along with the lengthening of the corrosion time after the optimized alloy is welded by using 5356 welding wires, and the result meets the environment of automobile use; the tensile strength of the optimized alloy welded joint after being corroded for 14 days can still reach over 75 percent of that of the base metal, and the requirement that the welding reaches over 70 percent of that of the base metal is met.
Detailed Description
The first embodiment is as follows:
the high-strength aluminum alloy for the automobile transmission shaft comprises 1.0-1.5 wt% of Si, 0.3 wt% of Fe, 0.6-1.1 wt% of Cu, 0.4-1.0 wt% of Mn, 1.2-1.8 wt% of Mg, 0.2 wt% of Cr, 0.3-0.7 wt% of Zn, 0.04-0.08 wt% of Ti, 0.1-0.2 wt% of Zr and the balance of Al.
The high-strength aluminum alloy for the automobile transmission shaft according to the embodiment comprises 1.2 wt% of Si, 0.3 wt% of Fe, 0.8 wt% of Cu, 0.5 wt% of Mn, 1.5 wt% of Mg, 0.2 wt% of Cr, 0.4 wt% of Zn, 0.06 wt% of Ti, 0.15 wt% of Zr and the balance of Al.
The preparation method of the high-strength aluminum alloy for the automobile transmission shaft comprises the process flows of raw material preparation → smelting → deslagging → component testing → component adjustment → down furnace → solid-gas two-stage refining → standing → online grain refinement → online degassing → online deslagging → casting → homogenization treatment → extrusion → quenching → aging.
In the preparation method of the high-strength aluminum alloy for the automobile transmission shaft, the extrusion step after the homogenization treatment is to heat the alloy to 500 ℃, and then extrude the alloy on a 75MN reverse extruder, wherein the extrusion temperature is 480 ℃ and the extrusion speed is 2.0 mm/s.
According to the preparation method of the high-strength aluminum alloy for the automobile transmission shaft, the quenching step after extrusion is to put the alloy in a quenching furnace at 530-550 ℃ and keep the temperature for 240min for solution treatment.
According to the preparation method of the high-strength aluminum alloy for the automobile transmission shaft, the aging step after quenching is to perform aging on the aluminum alloy within the range of 160 ℃ for 720 min.
The high-strength aluminum alloy for the automobile transmission shaft according to the embodiment has the mechanical properties shown in table 1:
TABLE 1 mechanical performance index for optimized alloy T6 state
Figure BDA0002890018770000041
The mechanical properties of the 6-series aluminum alloy compared with the high-strength aluminum alloy for the automobile transmission shaft according to the embodiment are shown in table 2:
TABLE 2 mechanical Properties of comparative example 6061 alloy in T6 temper
Figure BDA0002890018770000042
It can be seen in tables 1 and 2 that the tensile strength, yield strength and hardness of the optimized alloy in the 3 specifications of phi 100mm to phi 160mm extruded bars are far superior to those of 6061 alloy, the elongation is slightly low, and the mechanical indexes (the tensile strength is greater than or equal to 450MPa, the yield strength is greater than or equal to 380MPa, and the elongation is greater than or equal to 10%) required by the aluminum alloy for the automobile transmission shaft are completely met.
The high-strength aluminum alloy for the automobile transmission shaft has the tensile strength of more than or equal to 450MPa, the yield strength of more than or equal to 380MPa and the elongation of more than or equal to 10%.
The second embodiment is as follows:
the high-strength aluminum alloy for the automobile transmission shaft comprises 1.0-1.5 wt% of Si, 0.3 wt% of Fe, 0.6-1.1 wt% of Cu, 0.4-1.0 wt% of Mn, 1.2-1.8 wt% of Mg, 0.2 wt% of Cr, 0.3-0.7 wt% of Zn, 0.04-0.08 wt% of Ti, 0.1-0.2 wt% of Zr and the balance of Al.
The high-strength aluminum alloy for the automobile transmission shaft according to the embodiment comprises 1.5 wt% of Si, 0.3 wt% of Fe, 1.1 wt% of Cu, 1.0 wt% of Mn, 1.8 wt% of Mg, 0.2 wt% of Cr, 0.7 wt% of Zn, 0.08 wt% of Ti, 0.2 wt% of Zr and the balance of Al.
The preparation method of the high-strength aluminum alloy for the automobile transmission shaft comprises the process flows of raw material preparation → smelting → deslagging → component testing → component adjustment → down furnace → solid-gas two-stage refining → standing → online grain refinement → online degassing → online deslagging → casting → homogenization treatment → extrusion → quenching → aging.
In the preparation method of the high-strength aluminum alloy for the automobile transmission shaft, the extrusion step after the homogenization treatment is to heat the alloy to 540 ℃, and then extrude the alloy on a 75MN reverse extruder, wherein the extrusion temperature is 480 ℃ and the extrusion speed is 2.0 mm/s.
In the preparation method of the high-strength aluminum alloy for the automobile transmission shaft, the quenching step after extrusion is to put the alloy into a 550 ℃ quenching furnace and keep the temperature for 300min for solution treatment.
According to the preparation method of the high-strength aluminum alloy for the automobile transmission shaft, the aging step after quenching is to perform aging on the aluminum alloy within the range of 170 ℃ for 720 min.
The preparation method of the high-strength aluminum alloy for the automobile transmission shaft, which is provided by the embodiment, comprises the following steps of: smelting an optimized alloy raw material, performing slagging treatment, analyzing components, introducing the qualified alloy raw material into a holding furnace for solid-gas two-stage refining treatment, standing, performing online grain refinement, online degassing and online deslagging on a melt, and casting. The cast bar was homogenized as soon as possible after casting. The solid-gas two-stage refining ensures the quality of the melt during smelting, and the online refining, degassing and deslagging further ensure the purity of the melt during casting so as to reduce the defects of cast rods and ensure the smooth casting.
The high-strength aluminum alloy for the automobile transmission shaft is welded by adopting 5356 welding wires, the welding humidity is controlled to be 40%, 50%, 60%, 70% and 80% respectively, an artificial atmosphere salt spray corrosion test is carried out according to GB/T10125, the PH value of a solution in a test box is 6.5-7.2, the PH value of the solution can be adjusted by hydrochloric acid or sodium hydroxide, and the test time is 7 days and 14 days respectively. The corrosion rates are shown in table 3, and the tensile strengths after corrosion are shown in table 4:
TABLE 3 Corrosion Rate of weld sites at different humidities
Figure BDA0002890018770000051
According to the high-strength aluminum alloy for the automobile transmission shaft in the embodiment, as shown in table 3, the corrosion rate is reduced along with the lengthening of the corrosion time, and the test result meets the environment of automobile use.
TABLE 4 tensile Strength of a welded joint after 14 days of Corrosion
Figure BDA0002890018770000061
As can be seen from table 4, the high-strength aluminum alloy for an automobile transmission shaft according to the present embodiment can still achieve a weld joint after corrosion of 75% or more of the base material, and satisfies the requirement that the weld reaches 70% or more of the base material.
The third concrete implementation mode:
the high-strength aluminum alloy for the automobile transmission shaft comprises 1.0-1.5 wt% of Si, 0.3 wt% of Fe, 0.6-1.1 wt% of Cu, 0.4-1.0 wt% of Mn, 1.2-1.8 wt% of Mg, 0.2 wt% of Cr, 0.3-0.7 wt% of Zn, 0.04-0.08 wt% of Ti, 0.1-0.2 wt% of Zr and the balance of Al.
In the high-strength aluminum alloy for automobile transmission shafts, Si and Mg form Mg2Si phase, Mg2Si phase is used as a main strengthening phase of the 6-series alloy, and the ratio of Mg to Si is 2: 1, and fixing Mg2The content of the Si phase is increased, and the alloy strengthening effect and the elongation are improved; and the maximum value of the tensile strength of the Al-Mg-Si alloy ternary alloy is positioned in the alpha (Al) -Mg2Si-Si three-phase region, and the alpha (Al) -Mg2In the Si-Si three-phase region, the alloy with the components of 1.2-2.0% of Si and 0.8-2.0% of Mg has smaller welding crack tendency.
In the high-strength aluminum alloy for the automobile transmission shaft according to the embodiment, after the Al-Mg-Si alloy is added with Cu, the existence form of Cu in the structure is not only dependent on the content of Cu, but also influenced by the contents of Mg and Si. When the Cu content is large and the ratio of Mg to Si is less than 1.08, w (Al) may be formed4CuMg5Si4) Phase, the remaining Cu forms CuAl2(ii) a When the ratio of Mg to Si is more than 1.73, S (Al) may be formed2CuMg) and CuAl2And (4) phase(s). w phase, S phase, CuAl2Phase and Mg2Different Si phase, only partial dissolution in solid state participates in strengthening, and the strengthening effect is not as good as that of Mg2The Si phase is large, but the Cu is added into the alloy, so that the plasticity of the alloy in hot processing is obviously improved, the heat treatment strengthening effect is increased, the extrusion effect can be inhibited, and the appearance of the alloy after Mn is added is reducedAnd (4) anisotropy.
According to the embodiment, Mn is added into the high-strength aluminum alloy for the automobile transmission shaft, so that the strength can be improved, and the corrosion resistance, the impact toughness and the bending property can be improved. However, Mn produces serious intracrystalline segregation in the alpha phase, which affects the recrystallization process of the alloy and causes coarsening of the crystal grains of the product.
In the high-strength aluminum alloy for the automobile transmission shaft, Zr is added in the alloy to refine grains, so that the weldability of the alloy can be obviously improved in an Al-Zn-Mg alloy, welding cracks can be obviously reduced when 0.2% of Zr is added, and the stress corrosion resistance of the alloy can be improved when 0.1% -0.2% of Zr is added in the Mn-containing Al-Zn-Mg alloy.
In the high-strength aluminum alloy for the automobile transmission shaft according to the embodiment, the Ti is added to the alloy to refine crystal grains of the alloy in an as-cast state and improve weldability of the alloy, but the effect is lower than that of Zr. The effect of adding Ti and Zr simultaneously is better.
According to the high-strength aluminum alloy for the automobile transmission shaft, the content of Fe and Cr impurity elements in the optimized alloy is reduced, and the damage to the alloy strength and the corrosion resistance is reduced. The addition amount of each element in the optimized alloy is low, the concentration of the formed solid solution is low, the decomposition tendency of the solid solution can be reduced, and the heat resistance and the corrosion resistance of the optimized alloy are improved.
According to the high-strength aluminum alloy for the automobile transmission shaft, the mechanical property of the optimized alloy reaches that the tensile strength is larger than or equal to 450MPa, the yield strength is larger than or equal to 420MPa, the elongation is larger than or equal to 11%, and the mechanical index required by the aluminum alloy for the automobile transmission shaft is met; the corrosion rate is reduced along with the lengthening of the corrosion time after the optimized alloy is welded by using 5356 welding wires, and the result meets the environment of automobile use; the tensile strength of the optimized alloy welded joint after being corroded for 14 days can still reach over 75 percent of that of the base metal, and the requirement that the welding reaches over 70 percent of that of the base metal is met.
The fourth concrete implementation mode:
according to the third embodiment, the high-strength aluminum alloy for the automobile transmission shaft is 1.2 wt% of Si, 0.3 wt% of Fe, 0.8 wt% of Cu, 0.5 wt% of Mn, 1.5 wt% of Mg, 0.2 wt% of Cr, 0.4 wt% of Zn, 0.06 wt% of Ti, 0.15 wt% of Zr, and the balance of Al.
The fifth concrete implementation mode:
according to the third embodiment, the high-strength aluminum alloy for the automobile transmission shaft is 1.0 wt% of Si, 0.3 wt% of Fe, 0.6 wt% of Cu, 0.4 wt% of Mn, 1.2 wt% of Mg, 0.2 wt% of Cr, 0.3 wt% of Zn, 0.04 wt% of Ti, 0.1 wt% of Zr, and the balance of Al.
The sixth specific implementation mode:
according to the third embodiment, the high-strength aluminum alloy for the automobile transmission shaft is 1.5 wt% of Si, 0.3 wt% of Fe, 1.1 wt% of Cu, 1.0 wt% of Mn, 1.8 wt% of Mg, 0.2 wt% of Cr, 0.7 wt% of Zn, 0.08 wt% of Ti, 0.2 wt% of Zr, and the balance of Al.
The seventh embodiment:
according to the third specific embodiment, the process flow of the preparation method of the high-strength aluminum alloy for the automobile transmission shaft comprises the steps of raw material preparation → smelting → deslagging → composition testing → composition adjustment → down furnace → solid-gas two-stage refining → standing → online grain refinement → online degassing → online deslagging → casting → homogenization treatment → extrusion → quenching → aging.
The specific implementation mode is eight:
according to the seventh specific embodiment, in the extrusion step after the homogenization treatment, the alloy is heated to 480-540 ℃, and then extruded on a 75MN reverse extruder at 460-480 ℃ and at 2.0 mm/s.
The specific implementation method nine:
according to the seventh specific embodiment, in the quenching step after extrusion, the alloy is placed in a quenching furnace at 530-550 ℃ and is subjected to heat preservation for 240-300 min for solution treatment.
The detailed implementation mode is ten:
according to the seventh specific embodiment, the aging step after quenching is to age the aluminum alloy within the range of 150-170 ℃ for 720 min.

Claims (8)

1. The utility model provides a high strength aluminum alloy for automobile transmission shaft which characterized in that: the high-strength aluminum alloy for the automobile transmission shaft comprises 1.0-1.5 wt% of Si, 0.3 wt% of Fe, 0.6-1.1 wt% of Cu, 0.4-1.0 wt% of Mn, 1.2-1.8 wt% of Mg, 0.2 wt% of Cr, 0.3-0.7 wt% of Zn, 0.04-0.08 wt% of Ti, 0.1-0.2 wt% of Zr and the balance of Al.
2. The high-strength aluminum alloy for the automobile transmission shaft according to claim 1, wherein: the high-strength aluminum alloy for the automobile transmission shaft comprises 1.2 wt% of Si, 0.3 wt% of Fe, 0.8 wt% of Cu, 0.5 wt% of Mn, 1.5 wt% of Mg, 0.2 wt% of Cr, 0.4 wt% of Zn, 0.06 wt% of Ti, 0.15 wt% of Zr and the balance of Al.
3. The high-strength aluminum alloy for the automobile transmission shaft according to claim 1, wherein: the high-strength aluminum alloy for the automobile transmission shaft comprises 1.0 wt% of Si, 0.3 wt% of Fe, 0.6 wt% of Cu, 0.4 wt% of Mn, 1.2 wt% of Mg, 0.2 wt% of Cr, 0.3 wt% of Zn, 0.04 wt% of Ti, 0.1 wt% of Zr and the balance of Al.
4. The high-strength aluminum alloy for the automobile transmission shaft according to claim 1, wherein: the high-strength aluminum alloy for the automobile transmission shaft comprises 1.5 wt% of Si, 0.3 wt% of Fe, 1.1 wt% of Cu, 1.0 wt% of Mn, 1.8 wt% of Mg, 0.2 wt% of Cr, 0.7 wt% of Zn, 0.08 wt% of Ti, 0.2 wt% of Zr and the balance of Al.
5. A method for producing a high-strength aluminum alloy for an automobile transmission shaft according to any one of claims 1 to 4, characterized by comprising: the process flow comprises the steps of raw material preparation → smelting → deslagging → component test → component adjustment → down furnace → solid-gas double-stage refining → standing → online grain refinement → online degassing → online deslagging → casting → homogenization treatment → extrusion → quenching → aging.
6. The method for preparing the high-strength aluminum alloy for the automobile transmission shaft according to claim 5, wherein the method comprises the following steps: the extrusion step after the homogenization treatment is to heat the alloy to 480-540 ℃, and then extrude the alloy on a 75MN reverse extruder at the extrusion temperature of 460-480 ℃ and the extrusion speed of 2.0 mm/s.
7. The method for preparing the high-strength aluminum alloy for the automobile transmission shaft according to claim 6, wherein the method comprises the following steps: and the quenching step after extrusion is to put the alloy into a quenching furnace at 530-550 ℃ for heat preservation for 240-300 min for solution treatment.
8. The method for preparing the high-strength aluminum alloy for the automobile transmission shaft according to claim 7, wherein the method comprises the following steps: the aging step after quenching is to age the aluminum alloy for 720min at the temperature of 150-170 ℃.
CN202110024825.7A 2021-01-08 2021-01-08 High-strength aluminum alloy for automobile transmission shaft and preparation method thereof Pending CN112853176A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110024825.7A CN112853176A (en) 2021-01-08 2021-01-08 High-strength aluminum alloy for automobile transmission shaft and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110024825.7A CN112853176A (en) 2021-01-08 2021-01-08 High-strength aluminum alloy for automobile transmission shaft and preparation method thereof

Publications (1)

Publication Number Publication Date
CN112853176A true CN112853176A (en) 2021-05-28

Family

ID=76005621

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110024825.7A Pending CN112853176A (en) 2021-01-08 2021-01-08 High-strength aluminum alloy for automobile transmission shaft and preparation method thereof

Country Status (1)

Country Link
CN (1) CN112853176A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113684401A (en) * 2021-08-25 2021-11-23 航桥新材料科技（滨州）有限公司 Aluminum alloy for high-service transmission shaft and preparation method thereof
CN114318079A (en) * 2021-12-30 2022-04-12 武汉镁里镁科技有限公司 Al-Mg-Si-Cu aluminum alloy for automobile transmission shaft and preparation method thereof
CN115094254A (en) * 2022-05-13 2022-09-23 山东裕航特种合金装备有限公司 Aluminum alloy for high-strength transmission shaft of automobile and preparation method of aluminum alloy
EP4299780A1 (en) * 2022-06-28 2024-01-03 Kaiser Aluminum Fabricated Products, LLC 6xxx alloy with high recycled material content

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110938765A (en) * 2019-12-18 2020-03-31 东北轻合金有限责任公司 High-strength Al-Mg-Si aluminum alloy bar for automobile chassis and manufacturing method thereof

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110938765A (en) * 2019-12-18 2020-03-31 东北轻合金有限责任公司 High-strength Al-Mg-Si aluminum alloy bar for automobile chassis and manufacturing method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
谢水生等: "《简明铝合金手册》", 31 December 2016, 冶金工业出版社 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113684401A (en) * 2021-08-25 2021-11-23 航桥新材料科技（滨州）有限公司 Aluminum alloy for high-service transmission shaft and preparation method thereof
CN114318079A (en) * 2021-12-30 2022-04-12 武汉镁里镁科技有限公司 Al-Mg-Si-Cu aluminum alloy for automobile transmission shaft and preparation method thereof
CN115094254A (en) * 2022-05-13 2022-09-23 山东裕航特种合金装备有限公司 Aluminum alloy for high-strength transmission shaft of automobile and preparation method of aluminum alloy
EP4299780A1 (en) * 2022-06-28 2024-01-03 Kaiser Aluminum Fabricated Products, LLC 6xxx alloy with high recycled material content

Similar Documents

Publication Publication Date Title
CN112853176A (en) High-strength aluminum alloy for automobile transmission shaft and preparation method thereof
CN110066932A (en) A kind of anti-corrosion 6xxx line aluminium alloy of medium weldability and preparation method thereof
JP2002543289A (en) Peel-resistant aluminum-magnesium alloy
CN111549264B (en) Preparation process of high-strength corrosion-resistant 5383 aluminum alloy and marine section
EP2328748A1 (en) Clad automotive sheet product
CN112458344B (en) High-strength corrosion-resistant aluminum alloy and preparation method and application thereof
CN110331319B (en) High-strength and high-plasticity corrosion-resistant aluminum alloy containing scandium and erbium and preparation method thereof
CN112048649A (en) Aluminum alloy, preparation method thereof and automobile casting
JP2004010963A (en) HIGH STRENGTH Ti ALLOY AND ITS PRODUCTION METHOD
CN112375945A (en) 6061 alloy aluminum profile for extruding new energy automobile battery tray and processing technology thereof
CN107739921A (en) A kind of automobile high-strength aluminium section bar and its production technology
CN109913676B (en) Yttrium-containing 6063 aluminum alloy and preparation method thereof
JP4201434B2 (en) Method for producing high-strength aluminum alloy extruded material with excellent corrosion resistance
CN112522552B (en) Corrosion-resistant aluminum alloy and preparation method and application thereof
CN111575559B (en) Corrosion-resistant 6-series aluminum alloy
CN111575550B (en) High-strength weldable aluminum alloy and preparation method thereof
CN107099710A (en) A kind of aluminium copper and its casting method
KR101499096B1 (en) Aluminum alloy and manufacturing method thereof
CN114250387B (en) Aluminum alloy and preparation method thereof
CN115233055A (en) Aluminum extruded section convenient to recycle and preparation method thereof
CN101590591B (en) Manufacturing method of aluminium alloy section with easy weld and high strength
CN114351015A (en) Fine-grain aluminum alloy and preparation method and application thereof
CN110042282B (en) Lanthanum-containing 6063 aluminum alloy and preparation method thereof
CN108220706B (en) Deformation aluminum alloy for improving crushing performance of extruded profile
CN113924377A (en) Aluminum alloy with silicon, magnesium, copper and zinc

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20210528

RJ01 Rejection of invention patent application after publication