CN103882258B

CN103882258B - A kind of valve seat zinc alloy material and preparation method thereof

Info

Publication number: CN103882258B
Application number: CN201410064611.2A
Authority: CN
Inventors: 刘孝峰
Original assignee: BENGBU YINGLU PHOTOELECTRIC CO LTD
Current assignee: Jiangsu Rudong Economic Development Zone Economic Development Corporation
Priority date: 2014-02-26
Filing date: 2014-02-26
Publication date: 2016-06-22
Anticipated expiration: 2034-02-26
Also published as: CN103882258A

Abstract

A kind of valve seat zinc alloy material, chemical element composition and mass percent thereof that it contains be: copper 13.0-14.5, manganese 1.0-1.2, stannum 0.06-0.08, antimony 0.1-0.2, chromium 1.8-2.3, molybdenum 0.05-0.08, vanadium 1.2-1.5, nickel 0.03-0.05, surplus are zinc。Alloy of the present invention, by adding Mn, reduces thermal conductivity, decreases heat loss, saves energy；By adding the element such as antimony, chromium so that alloy good processability, wearability is good, and machining accuracy is high, good airproof performance；The present invention reduces the consumption of copper, add vanadium, nickel, molybdenum, refined crystal grain, it is ensured that intensity and corrosion resistance meet the requirement of valve seat, also have this alloy not leaded, environmental protection。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 is at about 2 grades, hence it is evident that improve yield rate。

Description

A kind of valve seat zinc 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 valve seat zinc alloy material and preparation method thereof。

Background technology

The function admirable of kirsite, has good casting property, it is possible to die casting is complex-shaped, the precision part of thin-walled, and cast(ing) surface is smooth；Surface treatment can be carried out: electroplate, spray, spray paint, polish, grinding etc.；Do not inhale ferrum when fusing and die casting, do not corrode die mould, not sticking to mould；There are the plurality of advantages such as good room temperature mechanical performance and wearability。

Current valve seat mainly uses ledrite, and harmful substance lead content is high, and thermal conductivity is higher, wastes electric energy, also has pyrite density big, and weight is big, and relatively costly。

Summary of the invention

It is an object of the invention to provide a kind of valve seat zinc alloy material and preparation method thereof, this Cu alloy material has intensity height, wearability is good, thermal conductivity is low, corrosion resistant advantage。

Technical scheme is as follows:

A kind of valve seat zinc alloy material, it is characterised in that: chemical element composition and mass percent thereof that it contains be: copper 13.0-14.5, manganese 1.0-1.2, stannum 0.06-0.08, antimony 0.1-0.2, chromium 1.8-2.3, molybdenum 0.05-0.08, vanadium 1.2-1.5, nickel 0.03-0.05, surplus are zinc。

The production method of described valve seat zinc alloy material, it is characterised in that:

(1), prepare pure zinc to originate as zinc-base matter in 1:0.3-0.6 ratio with useless kirsite, pure zinc is added and puts into fusing in stove, carry out removing impurities matter, deoxidation, employing refining agent initial refining, add alloying component and carry out alloying, add the fusing of useless zinc, add refining agent double refining, detection and adjust chemical element component content to qualified, casting, casting after-baking etc.；

(2) lot sequence, putting into alloying element in alloying process in stove is: (1) copper；(2) manganese, nickel, chromium；(3) stannum, molybdenum；(4) other residual componentss；The each batch of interval putting into element is 21-25 minute, stirs after feeding intake。

Described casting after-baking is: first by room temperature with 180-190 DEG C/h of ramp to 300-320 DEG C, it is incubated 40-60 minute, then with 180-190 DEG C/h of ramp to 440-460 DEG C, is incubated 40-60 minute, again with 180-190 DEG C/h of ramp to 620-630 DEG C, it is incubated 2-3 hour；It is cooled to 80-100 DEG C with 80-90 DEG C of clear water again, then naturally cools to room temperature, place 1-2 hour；Again with 180-190 DEG C/h of ramp to 300-320 DEG C, it is incubated 40-60 minute, then with 180-190 DEG C/h of ramp to 440-460 DEG C, is incubated 40-60 minute, then with 180-190 DEG C/h of ramp to 620-630 DEG C, be incubated 2-3 hour；It is cooled to 120-140 DEG C with 80-90 DEG C of clear water, takes out air cooling and get final product。

Described refining agent is made up of the raw material of following weight portion: clay 10-12, schmigel 3-4, aluminium nitride 5-6, Kaolin 8-10, celestite 1-2, tree ash 1-2, aluminium hydroxide 8-10, jade powder 3-4, montmorillonite 1-2, Fluorspar Powder 3-4, Paris white 4-5, Bi₂O₃2-3；Its preparation method is by clay, schmigel, aluminium nitride, Kaolin, celestite, tree ash, aluminium hydroxide, jade powder, montmorillonite mixing, heating is to 2600-3000 DEG C, stir 1-2 hour, after cooling, add to the hydrochloric acid solution of 10-15%, soak 1-2 hour, filter, filtering residue is cleaned with clear water repeatedly, dries, and merges with other composition and mixs homogeneously and get final product。

Beneficial effects of the present invention

Alloy of the present invention, by adding Mn, reduces thermal conductivity, decreases heat loss, saves energy；By adding the element such as antimony, chromium so that alloy good processability, wearability is good, and machining accuracy is high, good airproof performance；The present invention reduces the consumption of copper, add vanadium, nickel, molybdenum, refined crystal grain, it is ensured that intensity and corrosion resistance meet the requirement of valve seat, also have this alloy not leaded, environmental protection。Casting post-processing temperature by conservative control, in batches throwing raw materials, use useless zinc as raw material, mechanical property is good, and alloy quality is 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 is at about 2 grades, hence it is evident that improve yield rate。

Detailed description of the invention

A kind of valve seat zinc alloy material, chemical element composition and mass percent thereof that it contains be: copper 13.0-14.5, manganese 1.0-1.2, stannum 0.06-0.08, antimony 0.1-0.2, chromium 1.8-2.3, molybdenum 0.05-0.08, vanadium 1.2-1.5, nickel 0.03-0.05, surplus are zinc。

The production method of described valve seat zinc alloy material is:

(1), prepare pure zinc to originate as zinc-base matter in 1:0.4 ratio with useless kirsite, pure zinc is added and puts into fusing in stove, carry out removing impurities matter, deoxidation, employing refining agent initial refining, add alloying component and carry out alloying, add the fusing of useless zinc, add refining agent double refining, detection and adjust chemical element component content to qualified, casting, casting after-baking etc.；

(2) lot sequence, putting into alloying element in alloying process in stove is: (1) copper；(2) manganese, nickel, chromium；(3) stannum, molybdenum；(4) other residual componentss；The each batch of interval putting into element is 23 minutes, stirs after feeding intake。

Described casting after-baking is: first by room temperature with 186 DEG C/h of ramp to 310 DEG C, be incubated 50 minutes, then with 185 DEG C/h of ramp to 450 DEG C, be incubated 50 minutes, then with 185 DEG C/h of ramp to 625 DEG C, be incubated 2.5 hours；It is cooled to 90 DEG C with 85 DEG C of clear water again, then naturally cools to room temperature, place 1.5 hours；Again with 185 DEG C/h of ramp to 310 DEG C, it is incubated 50 minutes, then with 185 DEG C/h of ramp to 450 DEG C, is incubated 50 minutes, then with 185 DEG C/h of ramp to 625 DEG C, be incubated 2.5 hours；It is cooled to 130 DEG C with 85 DEG C of clear water, takes out air cooling and get final product。

Described refining agent is made up of the raw material of following weight portion (kilogram): clay 10, schmigel 4, aluminium nitride 5, Kaolin 8, celestite 1, tree ash 2, aluminium hydroxide 8, jade powder 4, montmorillonite 1, Fluorspar Powder 4, Paris white 4, Bi₂O₃3；Its preparation method is by clay, schmigel, aluminium nitride, Kaolin, celestite, tree ash, aluminium hydroxide, jade powder, montmorillonite mixing, heating is to 2600-3000 DEG C, stir 1-2 hour, after cooling, add to the hydrochloric acid solution of 10-15%, soak 1-2 hour, filter, filtering residue is cleaned with clear water repeatedly, dries, and merges with other composition and mixs homogeneously and get final product。

The present embodiment valve seat zinc alloy material, tensile strength б b is 390Mpa, hardness number HB is 97, impact flexibility (J/cm²) 41。

Claims

1. a valve seat zinc alloy material, it is characterised in that: chemical element composition and mass percent thereof that it contains be: copper 13.0-14.5, manganese 1.0-1.2, stannum 0.06-0.08, antimony 0.1-0.2, chromium 1.8-2.3, molybdenum 0.05-0.08, vanadium 1.2-1.5, nickel 0.03-0.05, surplus are zinc；The production method of described valve seat zinc alloy material: (1), prepare pure zinc and useless kirsite and originate as zinc-base matter in 1:0.3-0.6 ratio, pure zinc is added and puts into fusing in stove, carry out removing impurities matter, deoxidation, employing refining agent initial refining, add alloying component carry out alloying, add useless zinc fusing, add refining agent double refining, detection and adjust chemical element component content to qualified, casting, casting after-baking；(2) lot sequence, putting into alloying element in alloying process in stove is: (1) copper；(2) manganese, nickel, chromium；(3) stannum, molybdenum；(4) other residual componentss；The each batch of interval putting into element is 21-25 minute, stirs after feeding intake；Described casting after-baking is: first by room temperature with 180-190 DEG C/h of ramp to 300-320 DEG C, it is incubated 40-60 minute, then with 180-190 DEG C/h of ramp to 440-460 DEG C, is incubated 40-60 minute, again with 180-190 DEG C/h of ramp to 620-630 DEG C, it is incubated 2-3 hour；It is cooled to 80-100 DEG C with 80-90 DEG C of clear water again, then naturally cools to room temperature, place 1-2 hour；Again with 180-190 DEG C/h of ramp to 300-320 DEG C, it is incubated 40-60 minute, then with 180-190 DEG C/h of ramp 440-460 DEG C, is incubated 40-60 minute, then with 180-190 DEG C/h of ramp to 620-630 DEG C, be incubated 2-3 hour；It is cooled to 120-140 DEG C with 80-90 DEG C of clear water, takes out air cooling and get final product。

2. valve seat zinc alloy material according to claim 1, it is characterised in that: described refining agent is made up of the raw material of following weight portion: clay 10-12, schmigel 3-4, aluminium nitride 5-6, Kaolin 8-10, celestite 1-2, tree ash 1-2, aluminium hydroxide 8-10, jade powder 3-4, montmorillonite 1-2, Fluorspar Powder 3-4, Paris white 4-5, Bi₂O₃2-3；Its preparation method is by clay, schmigel, aluminium nitride, Kaolin, celestite, tree ash, aluminium hydroxide, jade powder, montmorillonite mixing, heating is to 2600-3000 DEG C, stir 1-2 hour, after cooling, add to the hydrochloric acid solution of 10-15%, soak 1-2 hour, filter, filtering residue is cleaned with clear water repeatedly, dries, and merges with other composition and mixs homogeneously and get final product。

3. the production method of valve seat zinc alloy material according to claim 1, it is characterized in that: (1), prepare pure zinc and useless kirsite and originate as zinc-base matter in 1:0.3-0.6 ratio, pure zinc is added and puts into fusing in stove, carry out removing impurities matter, deoxidation, employing refining agent initial refining, add alloying component carry out alloying, add useless zinc fusing, add refining agent double refining, detection and adjust chemical element component content to qualified, casting, casting after-baking；(2) lot sequence, putting into alloying element in alloying process in stove is: (1) copper；(2) manganese, nickel, chromium；(3) stannum, molybdenum；(4) other residual componentss；The each batch of interval putting into element is 21-25 minute, stirs after feeding intake；Described casting after-baking is: first by room temperature with 180-190 DEG C/h of ramp to 300-320 DEG C, it is incubated 40-60 minute, then with 180-190 DEG C/h of ramp to 440-460 DEG C, is incubated 40-60 minute, again with 180-190 DEG C/h of ramp to 620-630 DEG C, it is incubated 2-3 hour；It is cooled to 80-100 DEG C with 80-90 DEG C of clear water again, then naturally cools to room temperature, place 1-2 hour；Again with 180-190 DEG C/h of ramp to 300-320 DEG C, it is incubated 40-60 minute, then with 180-190 DEG C/h of ramp 440-460 DEG C, is incubated 40-60 minute, then with 180-190 DEG C/h of ramp to 620-630 DEG C, be incubated 2-3 hour；It is cooled to 120-140 DEG C with 80-90 DEG C of clear water, takes out air cooling and get final product。