The representative uses of 6061 aluminum rods include aerospace fixtures, electrical fixtures, and communications fields. They are also widely used in automated mechanical parts, precision machining, mold manufacturing, electronics and precision instruments, SMT, and PC board soldering carriers. etc. Introduction: It is an alloy that can be strengthened by heat treatment. It has good formability, weldability, and machinability. It also has medium strength and can still maintain good operability after annealing. The main alloying elements of 6061 alloy are magnesium and silicon, and forms the Mg2Si phase.
6061-T651 is the main alloy of 6061 alloy. It is a high-quality aluminum alloy product produced by heat treatment and pre-stretching process. Although its strength cannot be compared with 2XXX series or 7XXX series, its magnesium, silicon The alloy has many properties, including excellent processing performance, excellent welding characteristics and electroplating properties, good corrosion resistance, high toughness and no deformation after processing, the material is dense and defect-free and easy to polish, easy to apply color film, and has excellent oxidation effect, etc. Excellent features. Typical uses: 1. The application of plates and strips is widely used in decoration, packaging, construction, transportation, electronics, aviation, aerospace, weapons and other industries. 2. Aluminum materials for aerospace are used to make aircraft skins, fuselage frames, girders, rotors, propellers, fuel tanks, wall panels and landing gear struts, as well as rocket forged rings, spacecraft wall panels, etc. 3. Aluminum materials for transportation are used for body structural parts of automobiles, subway vehicles, railway buses, high-speed buses, doors and windows, shelves, automobile engine parts, air conditioners, radiators, body panels, wheels and ship materials. 4. Aluminum materials for packaging All-aluminum can-making materials are mainly used as metal packaging materials in the form of sheets and foils to be made into cans, lids, bottles, barrels, and packaging foils. Widely used in packaging of beverages, food, cosmetics, medicines, cigarettes, industrial products, etc. 5. Aluminum materials for printing are mainly used to make PS plates. Aluminum-based PS plates are a new material in the printing industry and are used for automated plate making and printing.
Basic state code of aluminum alloy:
F
Free processing state
Suitable for work hardening and heat treatment during the forming process For products with special requirements, the mechanical properties of products in this state are not specified (uncommon)
O
Annealed state
Suitable for obtaining the lowest strength after complete annealing Processed products (occasionally occur)
H
Work hardened state
Applicable to products whose strength is improved through work hardening. The product can be processed after work hardening. (It may not go through) additional heat treatment that reduces the strength (generally non-heat treatment strengthened materials)
W
Solid solution heat treatment state
A Unstable state, only applicable to alloys that have been naturally aged at room temperature after solid solution heat treatment. This state code only indicates that the product is in the natural aging stage (uncommon)
T
Heat treatment State
(Different from F, O, H state)
Applicable to products that have been stabilized through (or not through) work hardening after heat treatment. The T code must be followed by one or more Arabic numerals (usually heat-treated strengthened materials)
The status code behind our common non-heat-treated strengthened aluminum alloys is usually the letter H plus two digits.
Such as 1100 H14.
The following briefly introduces the meaning of the following status codes.
The letter H is usually followed by two digits:
The first digit represents the work hardening method.
The first digit after H is: 1, 2, 3, 4
That is, H1* H1* means simple work hardening treatment
H2* H2 * indicates work hardening and incomplete annealing
H3* H3* indicates work hardening and stabilization treatment
H4* H4* indicates work hardening and painting treatment
The second digit indicates the degree of hardening the material has achieved.
The second digit after H is: 1, 2, 3, 4, 5, 6, 7, 8, 9
H*1 between 0 and 2 Hardness
H*2 1/4 hard
H*3 Hardness between 2 and 4
H*4 1/2 hard
H*5 Hardness between 4 and 6
H*6 3/4 hard
H*7 Hardness between 6 and 8
H*8 fully hard state
H*9 super hard state
(There are not many cases where H is followed by three numbers, only a few. H111 means final annealing and then Appropriate amount of work hardening. H112 indicates products suitable for hot processing and forming. H116 indicates products made of 5*** series alloys with a magnesium content of ≥4.0%.)
Our common heat treatment strengthened type The status code behind the aluminum alloy is generally the letter T plus one or more Arabic numerals to indicate the subdivision status of T
Add 0-10 Arabic numerals after T to indicate the subdivision status (called TX status). The number after T indicates the heat treatment procedure for the product.
T0
After solid solution heat treatment, natural aging and then cold working.
Suitable for products whose strength has been increased by cold processing.
T1
It is cooled by the high-temperature molding process and then naturally aged to a basically stable state.
Applicable to products that will no longer undergo cold processing after being cooled by the high-temperature forming process (straightening and leveling can be performed, but the mechanical performance limit will not be affected).
T2
It is cooled by the high-temperature forming process and naturally aged to a basically stable state after cold working. It is suitable for products that are cooled by high-temperature molding processes and then cold processed, or straightened and leveled to improve strength.
T3
After solid solution heat treatment, cold working is carried out, and then it is naturally aged to a basically stable state. It is suitable for products that undergo cold processing, or straightening and leveling to improve strength after solution heat treatment.
T4
After solid solution heat treatment, it is naturally aged to a basically stable state. It is suitable for products that will not undergo cold processing after solution heat treatment (straightening and leveling can be carried out, but the mechanical performance limit will not be affected).
T5
It is cooled by the high-temperature molding process and then artificially aged.
It is suitable for products that are artificially aged after being cooled by the high-temperature molding process without cold processing (straightening and leveling can be carried out, but the mechanical performance limit will not be affected).
T6
The state of artificial aging after solution heat treatment.
Applicable to products that will no longer undergo cold processing after solid solution heat treatment.
T7
The state of artificial aging after solution heat treatment.
Applicable to products whose strength has crossed the highest peak on the aging curve during artificial aging in order to obtain certain important properties after solid solution heat treatment.
T8
A state in which solution heat treatment is followed by cold working and then artificial aging.
It is suitable for products that have been cold processed, or straightened and leveled to improve product strength.
T9
Artificial aging after solution heat treatment and then cold working.
Suitable for products whose strength is improved by cold processing.
T10
After cooling from the high-temperature molding process, it is cold worked and then artificially aged.
Suitable for products that have been cold processed, or straightened and leveled to improve product strength.
T state and TXXX state (except stress relief state)
Add one Arabic numeral after the TX state code (called TXX state), or add two Arabic numerals ( (called TXXX state), which indicates a state that has undergone a specific process that significantly changes product characteristics (such as mechanical properties, corrosion resistance, etc.).
T42
It is suitable for products that have reached a fully stable state with natural aging after solid solution heat treatment in the O or F state. It is also suitable for the purchaser to heat-treat processed products in any state. Products whose mechanical properties have reached T42 status.
T62
It is suitable for products that enter artificial aging after solid solution heat treatment in the O or F state. It is also suitable for the purchaser to heat-treat processed products in any state, and the mechanical properties reach Products with T62 status.
T73
Suitable for products that have been aged after solid solution heat treatment to achieve specified mechanical properties and stress corrosion resistance performance indicators
T74
Same as T73 status definition. The tensile strength of this state is greater than the T73 state, but less than the T76 state.
T76
The status definition is the same as T73. The tensile strength of this state is higher than that of the T73 and T74 states respectively, and the stress corrosion cracking resistance is lower than that of the T73 and T74 states respectively, but its spalling corrosion resistance is still good.
T7X2
It is suitable for products that have undergone artificial aging treatment after solid solution heat treatment in the O or F state, and the mechanical properties and corrosion resistance have reached the T7X state.
T81
It is suitable for products that undergo solid solution heat treatment, undergo about 1% cold working deformation to increase strength, and then undergo artificial aging.
T87
It is suitable for products that undergo solid solution heat treatment, undergo about 7% cold working deformation to increase strength, and then undergo artificial aging.
Stress relief status
Add "51", or "510", or "511" or "52" or "54" after the above TX or TXX or TXXX status code to indicate Product status code that has undergone stress relief treatment.
TX51
TXX51
TXXX51
It is suitable for stretching according to the specified amount after solid solution heat treatment or cooling from the high temperature forming process. Thick plates, rolled or cold-finished bars and die forgings, forged rings or rolled rings, these products are not straightened after stretching.
The permanent deformation of thick plates is 1.5%~3%; the permanent deformation of rolled or cold-finished bars is 1%~3%; the permanent deformation of die forgings, forged rings or rolled rings The amount is 1%~5%.
TX510
TXX510
TXXX510
It is suitable for stretching according to the specified amount after solid solution heat treatment or cooling from the high-temperature forming process. extruded rods, profiles and tubes, as well as drawn tubes, which are stretched without straightening.
The permanent deformation of extruded rods, shapes and pipes is 1%~3%; the permanent deformation of drawn pipes is 1.5%~3%.
TX511
TXX511
TXXX511
Suitable for solution heat treatment or cooling according to the specified amount after cooling from the high temperature forming process extruded rods, shapes and tubes, as well as drawn tubes, which can be slightly straightened to meet standard tolerances after stretching.
The permanent deformation of extruded rods, shapes and pipes is 1%~3%, and the permanent deformation of drawn pipes is 1.5%~3%.
TX52
TXX52
TXXX52
Suitable for solution heat treatment or cooling from the high-temperature forming process to relieve stress through compression. To produce products with a permanent deformation of 1% to 5%.
TX54
TXX54
TXXX54
Suitable for die forgings that are stress relieved by cold shaping in the final forging die.
T6, solution treatment (quenching), artificial aging
T62, solution treatment by annealing or F state, artificial aging
T61 is a special In the heat treatment state, its strength is required to be lower than T6.
T61, never seen it.