CN103757473B

CN103757473B - A kind of environment-protective free-cutting nickel silver alloy material and preparation method thereof

Info

Publication number: CN103757473B
Application number: CN201410011356.5A
Authority: CN
Inventors: 丁健; 倪受春; 林其斌; 葛浩; 夏岩磊; 杨玭
Original assignee: Chuzhou University
Current assignee: Chuzhou University
Priority date: 2014-01-10
Filing date: 2014-01-10
Publication date: 2016-01-20
Anticipated expiration: 2034-01-10
Also published as: CN103757473A

Abstract

A kind of environment-protective free-cutting nickel silver alloy material, the chemical element composition that it contains and mass percent thereof are: nickel 5.8-6.2, zinc 13.5-13.9, antimony 0.35-0.38, cerium 0.05-0.09, Li1.2-1.4, Ba0.06-0.08, surplus are copper.Nickel silver alloy of the present invention remains the color and luster of copper-nickel alloy beauty, also has the processing characteristics of zinc yellow copper excellence, and by adding antimony, cerium, Li, Ba element, excellent cutting performance, and conductivity is good.Copper alloy of the present invention is applicable to the precision component making the fields such as instrument, medicine equipment, daily necessities and communication.Refining agent of the present invention is used for Foundry Production, and the degree of porosity in foundry goods can be made to reduce 1-2 degree, and oxide inclusion, at about 2 grades, significantly improves yield rate.

Description

A kind of environment-protective free-cutting nickel silver alloy material and preparation method thereof

Technical field

The present invention relates to the manufacture field of metal alloy compositions, particularly relate to a kind of environment-protective free-cutting nickel silver alloy material and preparation method thereof.

Background technology

Copper is because of its good electroconductibility, and plasticity-, erosion resistance, application widely.In copper alloy, add Lv ﹑ Nie ﹑ Meng ﹑ Xi ﹑ Gui ﹑ lead and other elements, the performance of copper can be improved, for different places.Still there are some problems in the existing copper alloy of current China, as contained a large amount of impurity element in alloy, high temperature fatigue is poor, hot strength is low; Hardness is low, and wear no resistance, frictional coefficient is large, work-ing life is short; Poorly conductive, waste electric energy; Bending machining performance is poor, easily fractures; Quality weight, constructional difficulties; Market demands can't be met.

Summary of the invention

The object of the present invention is to provide a kind of environment-protective free-cutting nickel silver alloy material and preparation method thereof, this Cu alloy material has that intensity is high, good processability, free machining advantage.

Technical scheme of the present invention is as follows:

A kind of environment-protective free-cutting nickel silver alloy material, is characterized in that: the chemical element composition that it contains and mass percent thereof are: nickel 5.8-6.2, zinc 13.5-13.9, antimony 0.35-0.38, cerium 0.05-0.09, Li1.2-1.4, Ba0.06-0.08, surplus are copper.

The production method of described environment-protective free-cutting nickel silver alloy material, is characterized in that:

(1), preparation fine copper and copper scrap are originated as copper matrix in 1:0.3-0.7 ratio, fine copper is added drop in stove and melt, carry out removing impurities matter, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add copper scrap fusing, add refining agent secondary refining, detection adjust chemical element component content to qualified, casting, casting postheat treatment etc.;

(2) lot sequence, dropping into alloying element in alloying process in stove is: (1) zinc; (2) nickel, antimony; (3) other remaining components; The each batch of timed interval of dropping into element is 18-22 minute, stirs after feeding intake.

Described casting postheat treatment is: first by room temperature with 240-250 DEG C/h of ramp to 330-350 DEG C, insulation 50-60 minute, then with 240-250 DEG C/h of ramp to 560-570 DEG C, insulation 1-2 hour; Be cooled to 300-320 DEG C with 270-280 DEG C/h of speed again, insulation 40-50 minute, then be cooled to 80-90 DEG C with 270-280 DEG C/h of speed, insulation 1-2 hour; Again with 240-250 DEG C/h of ramp to 350-370 DEG C, insulation 1-2 hour; 100-120 DEG C is cooled to again, insulation 1-2 hour with 250-260 DEG C/h of speed; Again with 200-210 DEG C/h of ramp to 310-330 DEG C, insulation 2-3 hour, takes out air cooling and get final product.

Described refining agent is made up of the raw material of following weight part: Paris white 4-5, bauxitic clay 2.1-2.5, tree ash 1-2, nano silicon 1-2, alum 2-3, jade powder 3-4, calcium carbide powder 4-5, potassium fluotitanate 2-3, sodium tetraborate 1-2, Bi ₂o ₃2-3; Its preparation method is by Paris white, bauxitic clay, tree ash, nano silicon, alum, jade powder, calcium carbide powder mixing, be heated to 2600-3000 DEG C, stir 1-2 hour, after cooling, be added in the hydrochloric acid soln of 10-15%, soak 1-2 hour, filter, filter residue is cleaned with clear water repeatedly, dries, merges mix and get final product with other composition.

Beneficial effect of the present invention

Nickel silver alloy of the present invention remains the color and luster of copper-nickel alloy beauty, also has the processing characteristics of zinc yellow copper excellence, and by adding antimony, cerium, Li, Ba element, excellent cutting performance, and conductivity is good.Copper alloy of the present invention is applicable to the precision component making the fields such as instrument, medicine equipment, daily necessities and communication.Refining agent of the present invention is used for Foundry Production, and the degree of porosity in foundry goods can be made to reduce 1-2 degree, and oxide inclusion, at about 2 grades, significantly improves yield rate.

Embodiment

A kind of environment-protective free-cutting nickel silver alloy material, the chemical element composition that it contains and mass percent thereof are: nickel 5.8-6.2, zinc 13.5-13.9, antimony 0.35-0.38, cerium 0.05-0.09, Li1.2-1.4, Ba0.06-0.08, surplus are copper.

The production method of described environment-protective free-cutting nickel silver alloy material is as follows:

(1), preparation fine copper and copper scrap are originated as copper matrix in 1:0.5 ratio, fine copper is added drop in stove and melt, carry out removing impurities matter, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add copper scrap fusing, add refining agent secondary refining, detection adjust chemical element component content to qualified, casting, casting postheat treatment etc.;

(2) lot sequence, dropping into alloying element in alloying process in stove is: (1) zinc; (2) nickel, antimony; (3) other remaining components; The each batch of timed interval of dropping into element is 20 minutes, stirs after feeding intake.

Described casting postheat treatment is: elder generation with 245 DEG C/h of ramp to 340 DEG C by room temperature, is incubated 55 minutes, then with 245 DEG C/h of ramp to 565 DEG C, is incubated 1.5 hours; Be cooled to 310 DEG C with 275 DEG C/h of speed again, be incubated 45 minutes, then be cooled to 85 DEG C with 275 DEG C/h of speed, be incubated 1.5 hours; Again with 245 DEG C/h of ramp to 360 DEG C, be incubated 1.5 hours; Be cooled to 110 DEG C with 255 DEG C/h of speed again, be incubated 1.5 hours; Again with 205 DEG C/h of ramp to 320 DEG C, be incubated 2.5 hours, take out air cooling and get final product.

Described refining agent is made up of the raw material of following weight part (kilogram): Paris white 5, bauxitic clay 2.1, tree ash 1, nano silicon 2, alum 2, jade powder 4, calcium carbide powder 4, potassium fluotitanate 3, sodium tetraborate 2, Bi ₂o ₃2; Its preparation method is by Paris white, bauxitic clay, tree ash, nano silicon, alum, jade powder, calcium carbide powder mixing, be heated to 2600-3000 DEG C, stir 1-2 hour, after cooling, be added in the hydrochloric acid soln of 10-15%, soak 1-2 hour, filter, filter residue is cleaned with clear water repeatedly, dries, merges mix and get final product with other composition.

The present embodiment environment-protective free-cutting nickel silver alloy material, tensile strength б b is 5340Mpa, yield strength 507MPa, hardness value HB is 144, electric conductivity %IACS63, softening temperature 607 DEG C, 20 DEG C of unit elongation 16.6%.

Claims

1. a production method for environment-protective free-cutting nickel silver alloy material, is characterized in that: the chemical element composition that described nickel silver alloy material contains and mass percent thereof are: nickel 5.8-6.2%, zinc 13.5-13.9%, antimony 0.35-0.38%, cerium 0.05-0.09%, Li1.2-1.4%, Ba0.06-0.08%, surplus are copper;

The production method of described environment-protective free-cutting nickel silver alloy material is:

(1), preparation fine copper and copper scrap are originated as copper matrix in 1:0.3-0.7 ratio, fine copper is added drop in stove and melt, carry out removing impurities matter, deoxidation, employing refining agent initial refining, add alloying constituent carry out alloying, then add copper scrap fusing, add refining agent secondary refining, detection and adjust chemical element component content to qualified, casting, casting postheat treatment;

(2) lot sequence, dropping into alloying element in alloying process in stove is: 1) zinc; 2) nickel, antimony; 3) other remaining components; The each batch of timed interval of dropping into element is 18-22 minute, stirs after feeding intake;

Described casting postheat treatment is: first by room temperature with 240-250 DEG C/h of ramp to 330-350 DEG C, insulation 50-60 minute, then with 240-250 DEG C/h of ramp to 560-570 DEG C, insulation 1-2 hour; Be cooled to 300-320 DEG C with 270-280 DEG C/h of speed again, insulation 40-50 minute, then be cooled to 80-90 DEG C with 270-280 DEG C/h of speed, insulation 1-2 hour; Again with 240-250 DEG C/h of ramp to 350-370 DEG C, insulation 1-2 hour; 100-120 DEG C is cooled to again, insulation 1-2 hour with 250-260 DEG C/h of speed; Again with 200-210 DEG C/h of ramp to 310-330 DEG C, insulation 2-3 hour, takes out air cooling and get final product;