CN104032163B - Cutting brass alloy material and preparation method thereof - Google Patents

Abstract

A kind of cutting brass alloy material, the chemical element composition that it contains and mass percent thereof are: silicon 0.5-0.9, zinc 16.5-17.9, As0.15-0.19, Sb0.08-0.10, Ho0.06-0.09, copper surplus.Alloy of the present invention contains silicon, Sb, Ho element, not only excellent cutting performance, and conductive corrosion-resistant performance is good, safety non-toxic evil; It is reasonable that the present invention casts post-processing temperature, uses copper scrap as raw material in addition, make core hardness and surface hardness basically identical, alloy quality stable homogeneous.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

Cutting brass 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 cutting brass 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 cutting brass alloy material and preparation method thereof, this Cu alloy material has corrosion-resistant, free machining advantage.

Technical scheme of the present invention is as follows:

A kind of cutting brass alloy material, is characterized in that: the chemical element composition that it contains and mass percent thereof are: silicon 0.5-0.9, zinc 16.5-17.9, As0.15-0.19, Sb0.08-0.10, Ho0.06-0.09, copper surplus.

The production method of described cutting brass alloy material, is characterized in that:

(1), preparation fine copper and copper scrap are originated as copper matrix in 1:0.4-0.8 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) As, silicon; (3) other remaining components; The each batch of timed interval of dropping into element is 20-25 minute, stirs after feeding intake.

Described casting postheat treatment is: first by room temperature with 250-260 DEG C/h of ramp to 350-360 DEG C, insulation 50-60 minute, then with 250-260 DEG C/h of ramp to 570-590 DEG C, insulation 1-2 hour; 80-100 DEG C is cooled to again, insulation 1-2 hour with 270-280 DEG C/h of speed; Again with 210-220 DEG C/h of ramp to 360-380 DEG C, insulation 1-2 hour; 80-100 DEG C is cooled to again, insulation 1-2 hour with 230-240 DEG C/h of speed; Again with 200-210 DEG C/h of ramp to 290-300 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: silicon-dioxide 8-12, attapulgite 8-12, vermiculite 5-8, attapulgite 8-10, medical stone 3-4, tree ash 1-2, Repone K 5-8, Calcium Fluoride (Fluorspan) 3-5, SODIUMNITRATE 3-5; Its preparation method is by silicon-dioxide, attapulgite, vermiculite, attapulgite, medical stone, tree ash 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

Alloy of the present invention contains silicon, Sb, Ho element, not only excellent cutting performance, and conductive corrosion-resistant performance is good, safety non-toxic evil; It is reasonable that the present invention casts post-processing temperature, uses copper scrap as raw material in addition, make core hardness and surface hardness basically identical, alloy quality stable homogeneous.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 cutting brass alloy material, the chemical element composition that it contains and mass percent thereof are: silicon 0.5-0.9, zinc 16.5-17.9, As0.15-0.19, Sb0.08-0.10, Ho0.06-0.09, copper surplus.

The production method of described cutting brass alloy material is:

(1), preparation fine copper and copper scrap are originated as copper matrix in 1:0.6 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) As, silicon; (3) other remaining components; The each batch of timed interval of dropping into element is 23 minutes, stirs after feeding intake.

Described casting postheat treatment is: elder generation with 255 DEG C/h of ramp to 355 DEG C by room temperature, is incubated 55 minutes, then with 255 DEG C/h of ramp to 580 DEG C, is incubated 1.5 hours; Be cooled to 90 DEG C with 275 DEG C/h of speed again, be incubated 1.5 hours; Again with 216 DEG C/h of ramp to 370 DEG C, be incubated 1.5 hours; Be cooled to 90 DEG C with 235 DEG C/h of speed again, be incubated 1.5 hours; Again with 205 DEG C/h of ramp to 295 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): silicon-dioxide 8, attapulgite 8, vermiculite 8, attapulgite 8, medical stone 3, tree ash 1, Repone K 8, Calcium Fluoride (Fluorspan) 5, SODIUMNITRATE 5; Its preparation method is by silicon-dioxide, attapulgite, vermiculite, attapulgite, medical stone, tree ash 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 cutting brass alloy material, tensile strength б b is 518Mpa, yield strength 491MPa, hardness value HB is 127, electric conductivity %IACS62, softening temperature 590 DEG C, 20 DEG C of unit elongation 14.5%.

Claims (1)

1. a cutting brass alloy material, is characterized in that: the chemical element composition that it contains and mass percent thereof are: silicon 0.5-0.9, zinc 16.5-17.9, As0.15-0.19, Sb0.08-0.10, Ho0.06-0.09, copper surplus;

The production method of described cutting brass alloy material is:

(1), preparation fine copper and copper scrap are originated as copper matrix in 1:0.4-0.8 ratio, fine copper is added in stove and melts, 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) As, silicon; (3) other remaining components; The each batch of timed interval of dropping into element is 20-25 minute, stirs after feeding intake;

Described casting postheat treatment is: first by room temperature with 250-260 DEG C/h of ramp to 350-360 DEG C, insulation 50-60 minute, then with 250-260 DEG C/h of ramp to 570-590 DEG C, insulation 1-2 hour; 80-100 DEG C is cooled to again, insulation 1-2 hour with 270-280 DEG C/h of speed; Again with 210-220 DEG C/h of ramp to 360-380 DEG C, insulation 1-2 hour; 80-100 DEG C is cooled to again, insulation 1-2 hour with 230-240 DEG C/h of speed; Again with 200-210 DEG C/h of ramp to 290-300 DEG C, insulation 2-3 hour, takes out air cooling and get final product.