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A copper-nickel alloy tube and tube blank technology, applied in the field of metal processing, can solve the problems of difficult production technology, high dimensional accuracy, and high dimensional deviation, and achieve the effects of excellent plasticity, high flaring manufacturability, and high dimensional deviation accuracy.
Inactive Publication Date: 2013-01-30
SUZHOU FURUI COPPER ALLOY TECH CO LTD
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[0006] 4. The shape is a straight tube and the length is super long: the length of most products is > 18m; some even exceed 25m
[0007] 5. High dimensional accuracy: the dimensional deviation of the product is higher than the high-precision requirements of the corresponding national standards
[0008] Because the comprehensive characteristics
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preparation example Construction
[0036] see figure 1 , a method for preparing a copper-nickel alloy tube, comprising the following steps:
[0037] 1) Place the BFe10-1-1 cupronickel material in melting and casting equipment for smelting and casting to obtain an ingot. The composition of the BFe10-1-1 cupronickel material includes: 9.5-10.5% Ni and Co, 1.1-1.3% Fe , 0.58-0.7% Mn, the balance being Cu; the melting temperature is 1280-1330°C, the casting temperature is 1260-1310°C, and the casting speed is 300-400r / min;
[0038] 2) Put the ingot obtained in the above step 1) into an extruder and extrude to obtain a tube blank. The extrusion heating temperature is 850-930°C, the extrusion force is 1350 tons, and the extrusion speed ratio is 20% ;
[0039] 3) Put the tube billet obtained in the above step 2) into a rolling mill for rolling to obtain a coiled tube billet. The rolling pass elongation coefficient of the rolling mill is 3.5-5.0, and the preferred rolling pass The elongation coefficient is 4.51, the...
Embodiment 1
[0044] A method for preparing a copper-nickel alloy tube, comprising the following steps:
[0045] Raw material batching, smelting, pre-furnace analysis, casting, extrusion, rolling, coil drawing, softening annealing of the coiling pass before the finished product, finished product coiling, bright stress relief annealing, coiling and finishing, and finished products. Among them, the chemical composition range of the main elements of the raw material ingredients is shown in Table 1:
[0046] Table 1 BFe10-1-1 main element chemical composition control range
[0047]
[0048] The tensile elongation coefficients are shown in Table 2:
[0049] Table 2 Tensile elongation coefficient
[0050] pass
elongation factor
General intermediate stretching passes
1.2～1.6
Stretching passes to eliminate work hardening
1.7～2.00
The final stretching pass of the finished product
1.05～1.09
[0051] The annealing process parameters are ...
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Abstract
The invention relates to a copper-nickel alloy tube preparation method, which comprises the following steps: placing a BFe10-1-1 cupronickel material in a casting apparatus to carry out smelting and casting to obtain an ingot; placing the ingot in an extruder to carry out extrusion to obtain a tube billet; placing the tube billet into a tube rolling machine to carry out rolling to obtain a roll-type tube billet; placing the roll-type tube billet into a disk drawing machine to carry out disk drawing to obtain a roll-type finished product; placing the roll-type finished product in a bright annealing furnace to carry out annealing to obtain a bright finished product; and placing the bright finished product into a coil straightening machine unit to carry out straightening, straight placing and sawing cutting to obtain the ultra-long qualified finished product. The semi-hard state BFe10-1-1 copper-nickel alloy straight tube produced by the method of the present invention has characteristics of excellent plasticity and high tube end expansion processing property, high size deviation precision, thin wall thickness, long length, saved intermediate softening degradation time, and high yield, wherein production efficiency of the method of the present invention is 3 times production efficiency of the traditional straight drawing production method.
Description
technical field [0001] The invention relates to the field of metal processing, in particular to a method for preparing a copper-nickel alloy tube. Background technique [0002] Copper-nickel alloy tubes are widely used in seawater desalination, shipbuilding, electric power, refrigeration, petrochemical and other fields due to their high corrosion resistance and anti-marine biological pollution characteristics; they are indispensable keys for large condensers and heat exchangers Core components, the product quality requirements are very high. The current market needs a semi-hard BFe10-1-1 copper-nickel alloy tube. The quality requirements for this copper-nickel alloy tube are as follows: [0003] 1. High mechanical performance requirements: Y2 state, elongation ≥ 25%, tensile strength: 345~390Mpa, tensile strength less than 345Mpa, too soft and easy to bend, not easy to install and use: but when the tensile strength is greater than 390Mpa, the installation will swell It is ...
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