CN105586547A - Air throttle made from high silicon-nickel-chrome alloy and manufacturing and machining method of air throttle - Google Patents

Abstract

The invention discloses an air throttle made from high silicon-nickel-chrome alloy and a manufacturing and machining method of the air throttle and belongs to the integrated technical field of heat treatment and machining. According to the adopted machining process, an air throttle blank is cast, then destressing machining is conducted, and finally antiseptic treatment is carried out. The alloy is composed of 0.54%-1.23% of C, 0.57%-0.92% of Ni, 0.7%-1.7% of Mo, 0.12%-0.19% of P, 0.5%-1% of Cr, 1.6%-2.7% of Ge, 0.29%-0.46% of Sb, 1.26%-2.78% of Si and the balance Fe and unavoidable impurities. The high silicon-nickel-chrome alloy material has the excellent castability and corrosion resistance, the high strength and the good tenacity, so that a cylinder sleeve made from the alloy is good in reliability and long in service life. By adding about 0.5% of the Ni into the alloy, the crystal structure is refined, the alloy abrasion resistance is improved and the overall performance of the alloy is also improved.

Description

What the high tantnickel evanohm of a kind of use was material cuts air valve and manufactures processing method

Technical field

This invention belongs to heat treatment and machined complex art field, the present invention relates to cut air valve and high tantnickelEvanohm, what the high voltage bearing high tantnickel evanohm of especially a kind of use was material cuts air valve and manufactures processing sideMethod.

Background technology

Casting high voltage bearing high tantnickel evanohm has good corrosion resistance, especially at atmosphere, seawater, alkaline moltenIn liquid. Because the α in high tantnickel evanohm microscopic structure has close electrode potential mutually with δ, so micro-electricityPond effect is very micro-. In addition, cast high silicon nichrome surface and can form fine and close SnO₂Film, can protect alloy notEasily oxidized, therefore it is having purposes widely aspect pump, valve, water-feeding & drainaging pipeline and ship equipment. ButThe relative brass of high tantnickel evanohm intensity of casting is at present lower, not high pressure resistant, nothing under some specific occasionsMethod is used, as seabed or the end compared with the pipe arrangement of depths etc.

At present, cut the conventional stainless steel material of air valve. Along with its bearing capacity of rising that is transmitted medium temperature willDecline gradually, while therefore selecting it to make hot-water line, should examine or check its long-term bearing capacity conduct under hot water temperatureChoice criteria. Because Cu alloy material can increase its rigidity and tension, impact resistance, and be difficult for being corroded,Therefore its research and use obtain people's concern again.

For high voltage bearing high tantnickel evanohm, the pore that reacts produced with casting mold because of molten metal will obviously increaseAdd, the resistance to pressure of thick-walled casting depends on that casting mold reacts the pore producing to a great extent, and thin-section castingDepend primarily on lead tolerance. Therefore design alloy should pay close attention to alloying element and preparation technology this aspect twoProblem.

Summary of the invention

For the deficiencies in the prior art, the present invention is intended to develop a kind of high tantnickel evanohm, and correspondingCut air valve manufacturing process. ensureing under the prerequisite of its tensile strength, by adjusting alloying component structure, improvingPreparation method, improves processing technology, makes its material and corresponding goods have good resistance to pressure and high-temperature behavior.

The prepared high voltage bearing high tantnickel evanohm of the present invention cuts air valve, and its alloy composition is: C0.54％-1.23％，Ni0.57％-0.92％，Mo：0.7％-1.7％，P0.12％-0.19％，Cr：0.5％-1％，Ge1.6%-2.7%, Sb0.29%-0.46%, Si1.26%-2.78%, surplus is iron and other is inevitableImpurity, preferably C0.59%-1.19%, Ni0.59%-0.81%, Mo0.9%-1.5%, P0.14%-0.17%,Cr:0.72%-0.92%, Ge1.8%-2.2%, Sb0.31%-0.44%, Si1.21%-2.62%, it is adoptedWith processing technology key technology as follows: (1) spice melting: crucible is preheated to 500-650 DEG C and adds pureMo, puts into a certain amount of phosphor-copper at 1100-1250 DEG C after fusing and carries out deoxidation, degass; After add foundry returns,Be warming up to again 1300 DEG C of Sb and Re that add below preheating, after 40-50 minute, add iron powder, finally add againEnter Si, P etc., then carry out secondary deoxidation with remaining phosphor-copper, after stirring, leave standstill and pour into a mould after ten minutes,Adopting hot die-casting molding method, is 1-10m/s at filling velocity, and pressure is prepare burden under 10-15Mpa condition moltenMelt molten metal and be pressed into metal mold, in press casting procedure, hot pressing chamber is connected together with melting the dry pot of metal, pressCasting is lived and is submerged in molten metal, adopts leverage to make piston realize press casting procedure. Foundry goods is solidifying under pressureGu, open the moving foundry goods that takes out, production efficiency is high, and metal waste is few, process stabilizing, and metal is pollution-free,Obtain foundry goods casting quality good, (2) carry out stress relief annealing to the compressing air valve that cuts, and workpiece is heatedTo 720-770 DEG C, after insulation 3.4-4.5h, stove is as cold as the 240-280 DEG C of air cooling of coming out of the stove again, then quenches in advancePyrogenic process+lonneal, temperature is: 150-250 DEG C, (3) carry out copper plating treatment to cutting air valve surface,The concentration proportioning of electroplate liquid is as follows: copper sulphate 10-15g/L, and copper nitrate 15-20g/L, sulfuric acid 40-60g/L,Brightener 4-6ml/L, electroplating solution temperature is controlled at 45-55 DEG C, and electroplating time is, 15-20 minute, electricityCurrent density is 2-4A/dm², (4) carry out anti-corrosion treatment to cutting air valve, will cut air valve and immerse by Wu LuotuoProduct, ethanol, APEO alkyl phenol, water are configured to mix uniformly antirust solution, the about 10-50 of sonic oscillationAfter minute, natural air drying, then by silicate cement glass, zinc oxide, water etc. are made into thick mixing material,After stirring, its high pressure painting is cut to air valve surface, then will cut air valve and be put at 70-90 DEG C and addHeat baking, makes its surface form layer protecting film, reaches antiseptic and rustproof object.

Feature of the present invention is as follows: alloy prepared by the present invention adds about 0.5% Ni, contributes to refinementTexture, improves Wear Resistance, improves its combination property, and prepared by the present invention cuts air valve textureTiny evenly high pressure resistant, tensile strength is good, and wearability, corrosion resistance acid solutions such as (especially) hydrochloric acid are good,Applied widely. First furnace charge is carried out to preheating in the process of preparing alloy, contribute to smelting efficiency and minimizingEnergy consumption, the process of deoxidation and degas (pass into protective gas, make vacuum reach 0.05MPa) contributes to carryHigh alloy purity, effectively controls the final constituent structure of alloy, reaches the performance requirement of anticipation, of the present inventionHigh tantnickel chromium alloy material has excellent casting and corrosion resisting property, high intensity, toughness and good toughProperty, the therefore good reliability of the cylinder sleeve of this invention, the life-span is long.

Detailed description of the invention

Embodiment mono-

Designing the processing technology of a kind of section of air valve, its alloy composition is: C0.54%, and Ni0.57%,Mo:0.7%, P0.12%, Cr0.5%, Ge1.6%, Sb0.29%, Si1.26%, surplus be iron andIts inevitable impurity, the processing technology key technology that it adopts is as follows: (1) spice melting: by crucibleBe preheated to 500 DEG C and add pure Mo, after fusing, put into a certain amount of phosphor-copper at 1100 DEG C and carry out deoxidation, degas;After add foundry returns, then be warming up to 1300 DEG C of Sb and Re that add below preheating, after 40 minutes, add iron powder,Finally add again Si, P etc., then carry out secondary deoxidation with remaining phosphor-copper, after stirring, leave standstill ten minutes laggardRow cast, adopts hot die-casting molding method, is 3m/s at filling velocity, and pressure is to prepare burden under 10Mpa conditionMolten metal bath is pressed into metal mold, in press casting procedure, hot pressing chamber connected together with melting the dry pot of metal,Die casting work is submerged in molten metal, adopts leverage to make piston realize press casting procedure. Foundry goods under pressureSolidify, open the moving foundry goods that takes out, production efficiency is high, and metal waste is few, process stabilizing, and metal is pollution-free,Obtain foundry goods casting quality good, (2) carry out stress relief annealing to the compressing air valve that cuts, and workpiece is heatedTo 720 DEG C, after insulation 3.4h, stove is as cold as 240 DEG C of air coolings of coming out of the stove again, then carries out quench method+low temperature in advance and returnFire, temperature is: 150 DEG C, (3) carry out copper plating treatment to cutting air valve surface, and the concentration of electroplate liquid is joinedThan as follows: copper sulphate 10g/L, copper nitrate 15g/L, sulfuric acid 40g/L, brightener 4ml/L, electroplating solutionTemperature is controlled at 45 DEG C, and electroplating time is that 15 minutes, current density was 2A/dm², (4) are to cutting air valveCarry out anti-corrosion treatment, will cut air valve immersion and be joined by methenamine, ethanol, APEO alkyl phenol, waterBe set to uniform mixing antirust solution, sonic oscillation is after about 10 minutes, natural air drying, then by silicate cement glassGlass, zinc oxide, water etc. are made into thick mixing material, after stirring, its high pressure painting are cut to air valve tableFace, then will cut air valve and be put at 70 DEG C and carry out heated baking, make its surface form layer protecting film, reachAntiseptic and rustproof object.

Embodiment bis-

Designing the processing technology of a kind of section of air valve, its alloy composition is: C1.23%, and Ni0.92%,Mo:1.7%, P0.19%, Cr1%, Ge2.7%, Sb0.46%, Si2.78%, surplus be iron andOther inevitable impurity, the processing technology key technology that it adopts is as follows: (1) spice melting: by earthenwareCrucible is preheated to 650 DEG C and adds pure Mo, puts into a certain amount of phosphor-copper carry out deoxidation, degas after fusing at 1250 DEG C;After add foundry returns, then be warming up to 1300 DEG C of Sb and Re that add below preheating, after 50 minutes, add ironPowder, finally adds Si again, P etc., then carry out secondary deoxidation with remaining phosphor-copper, after stirring, leave standstill ten minutesAfter pour into a mould, adopt hot die-casting molding method, be 10m/s at filling velocity, pressure is under 15Mpa conditionThe molten metal bath of batching is pressed into metal mold, in press casting procedure, hot pressing chamber and the dry pot of thawing metal is connected inTogether, die casting work is submerged in molten metal, adopts leverage to make piston realize press casting procedure. Foundry goods is at pressureUnder effect, solidify, open the moving foundry goods that takes out, production efficiency is high, and metal waste is few, process stabilizing, and metalPollution-free, obtain foundry goods casting quality good, (2) carry out stress relief annealing to the compressing air valve that cuts, willWorkpiece is heated to 770 DEG C, and after insulation 4.5h, stove is as cold as 280 DEG C of air coolings of coming out of the stove again, then carries out quench method in advance+ lonneal, temperature is: 250 DEG C, (3) carry out copper plating treatment, electroplate liquid to cutting air valve surfaceConcentration proportioning as follows: copper sulphate 15g/L, copper nitrate 20g/L, sulfuric acid 60g/L, brightener 6ml/L,Electroplating solution temperature is controlled at 55 DEG C, and electroplating time is 20 minutes, and current density is 4A/dm²，(4)Carry out anti-corrosion treatment to cutting air valve, will cut air valve and immerse by methenamine, ethanol, APEO alkylPhenol, water are configured to mix uniformly antirust solution, and sonic oscillation is after about 50 minutes, natural air drying, then by siliconHydrochlorate waterglass, zinc oxide, water etc. are made into thick mixing material, after stirring, by its high pressure paintingCut air valve surface, then will cut air valve and be put at 90 DEG C and carry out heated baking, make its surface form one deck protectionFilm, reaches antiseptic and rustproof object.

Applicant's statement, the present invention illustrates detailed process equipment and process of the present invention by above-described embodimentFlow process, but the present invention is not limited to above-mentioned detailed process equipment and process flow process, does not mean that the present inventionMust rely on above-mentioned detailed process equipment and process flow process could implement. Person of ordinary skill in the field shouldThis understands, any improvement in the present invention, the equivalence replacement to the each raw material of product of the present invention and auxiliary elementThe selections of interpolation, concrete mode etc., within all dropping on protection scope of the present invention and open scope.

Claims (1)

1. what be material with high tantnickel evanohm cuts air valve and manufactures a processing method, and high tantnickel evanohm comprisesFollowing element wt degree: C0.54%-1.23%, Ni0.57%-0.92%, Mo:0.7%-1.7%,P0.12％-0.19％，Cr：0.5％-1％，Ge1.6％-2.7％，Sb0.29％-0.46％，Si1.26％-2.78%, surplus is iron and other inevitable impurity, it is characterized in that:

(1) spice melting: crucible is preheated to 500-650 DEG C and adds pure Mo, put at 1100-1250 DEG C after fusingEntering a certain amount of phosphor-copper carries out deoxidation, degass; After add foundry returns, then be warming up to 1300 DEG C and add below pre-Sb and the Re of heat, added iron powder after 40-50 minute, finally adds Si again, P etc., then use remaining phosphor-copperCarry out secondary deoxidation, after stirring, leave standstill and pour into a mould after ten minutes, adopt hot die-casting molding method, filling type speedDegree is 1-10m/s, and pressure is that the molten metal bath of preparing burden under 10-15Mpa condition is pressed into metal mold, is pressingIn casting process, hot pressing chamber is connected together with melting the dry pot of metal, die casting work is submerged in molten metal, adopts leverMechanism makes piston realize press casting procedure, and foundry goods solidifies under pressure, opens the moving foundry goods that takes out, and produces effectRate is high, and metal waste is few, process stabilizing, and metal is pollution-free, obtains foundry goods casting quality good,

(2) the compressing air valve that cuts is carried out to stress relief annealing, workpiece is heated to 720-770 DEG C, insulation 3.After 4-4.5h, stove is as cold as the 240-280 DEG C of air cooling of coming out of the stove again, then carries out quench method+lonneal in advance, tempering temperatureDegree is: 150-250 DEG C,

(3) carry out copper plating treatment to cutting air valve surface, the concentration proportioning of electroplate liquid is as follows: copper sulphate 10-15g/L,Copper nitrate 15-20g/L, sulfuric acid 40-60g/L, brightener 4-6ml/L, electroplating solution temperature is controlled at 45-55 DEG C, electroplating time is, 15-20 minute, current density is 2-4A/dm²，

(4) carry out anti-corrosion treatment to cutting air valve, will cut air valve and immerse by methenamine, ethanol, APEOAlkyl phenol, water are configured to mix uniformly antirust solution, after the about 10-50 of sonic oscillation minute, and natural air drying,By silicate cement glass, zinc oxide, water etc. are made into thick mixing material again, after stirring, by its heightPress spraying to cut an air valve surface, then will cut air valve and be put at 70-90 DEG C and carry out heated baking, make its surperficial shapeBecome layer protecting film, reach antiseptic and rustproof object.