Copper base alloy with improved punchin and impacting performance and its preparing method
A copper-based alloy, alloy technology, applied in 0}/I{, the preparation of the alloy, the copper-based alloy with stamping and punching properties, the SND is at least 10 [SND field
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Embodiment 1
[0059] In an argon atmosphere, copper-based alloy samples No. 1-4, No. 6-9 and No. 11-16 having the chemical composition analysis results (% by weight) shown in Table 1 were melted and cast in a vertical continuous casting machine An ingot with a size of 20mm×80mm×1000mm was formed. The obtained ingot was subjected to a homogenization heat treatment at 900° C. for 1 hour. Afterwards, the ingots (numbers 1-4, 6-9 and 11-16) were hot rolled from 20 mm to 6.0 mm in thickness, quenched with water and pickled. The 6.0mm thick sheets were cold rolled to various thicknesses: 2.5mm for samples numbered 1, 7 and 8; 2.0mm for samples numbered 2, 3 and 16; 2.0mm for samples numbered 4, 6 and 15 The thickness of the sample is 1.0mm; the thickness of the sample numbered 9 is 3.5mm; the thickness of the sample numbered 11 is 0.6mm; the thickness of the sample numbered 12 is 0.5mm; the thickness of the sample numbered 13 is 0.3mm; mm.
[0060] Copper-based alloy samples having the chemica...
Embodiment 2
[0068] For sample alloy No. 1 according to the present invention (see above Table 1; plate thickness 0.20mm), industrial phosphor bronze alloy (C5191; state, H; plate thickness, 0.20mm; 6.5% by weight Sn, 0.2% by weight P, the rest is Cu) and industrial copper-based alloy (C7025; state, H; plate thickness, 0.20mm; 3.2% by weight Ni, 0.70% by weight Si, 0.15% by weight Mg, and the rest is Cu) electrical conductivity, 0.2% yield strength, Spring deflection limit, Vickers hardness, press workability and bending properties were evaluated.
[0069] conductivity
(%IACS)
0.2% yield strength
(N / mm 2 )
0° direction
90° direction
elastic deflection limit
(N / mm 2 )
0° direction
90° direction
Vickers hardness
(HV)
Maximum punch
Number of times
(×10 4 )
R / t * the smallest
value
0° direction
90° direction
The present invention
Gold No. 1 sample
40...
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