CN100334244C

CN100334244C - Manufacturing method of metal ceramic power machinery product

Info

Publication number: CN100334244C
Application number: CNB2005100213117A
Authority: CN
Inventors: 敬康林
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-07-22
Filing date: 2005-07-22
Publication date: 2007-08-29
Anticipated expiration: 2025-07-22
Also published as: CN1718809A

Abstract

The present invention relates to a method for manufacturing a metal ceramic power machinery product, which comprises the following steps: (1) an alloy is smelted and is composed of the following compounds by wt%: 50 to 70% of aluminium, 15 to 30% of zinc, 0.5 to 5% of titanium, 1 to 8% of copper, 5 to 10% of silicon and 0.005 to 0.03% of nitrogen, the smelting technology of the alloy is a traditional method, and nitrogen gas is added to the alloy when the temperature of the alloy is more than or equal to 1600 DEG C; (2) the alloy is cast into a blank piece of a work piece at 1700 DEG C, and then the blank piece is mechanically processed into the work piece; (3) micro-arc oxidation, cleaning and post-processing are carried out to the work piece to obtain a finished product.

Description

The manufacture method of metal ceramic power machinery product

Technical field:

The present invention is relevant with the manufacture method of the power machinery product of doing relative movement.

Background technology:

In the power machinery product, make length decision in the work-ing life power machinery product life-span length as parts such as piston ring, cylinder body, Tao Ti of relative movement, at utmost improve piston, cylinder body surface hardness, improve the solidity to corrosion of piston, cylinder body, just can at utmost prolong the work-ing life of product.Traditional power machine industry production piston ring, cylinder body base material adopt the high performance alloys steel, through mechanical workout, thermal treatment, or thermospray, durionise, become product after the precision work.Its material price height, the complete processing complexity, plant factor is low, and the production cycle is long, the production cost height.Traditional is generally HV800-900 as piece surface hardness such as piston ring, cylinder body, valve bodies, and part and hardness are higher than the working face friction of HV800-900 and use hundreds of hour inefficacy.After adopting hot-spraying techniques to improve surface hardness, the matrix of part and top coat critical load Lc≤17N cause part can not satisfy the high pressure operating mode.Not anti-NO _X, Cl ^-, SO ₄ ^2-, PO _x, OH ^-, H ⁺Deng corrosive power, particularly 40 ℃ of inefficacies in a short time that part can be very fast in above-mentioned medium more than the temperature.

The content of invention:

The purpose of this invention is to provide a kind of product and have high tensile strength, surface hardness, can satisfy high temperature, high pressure operating mode, the manufacture method of the metal ceramic power machinery product that solidity to corrosion is good.

The present invention is achieved in that

1, the manufacture method of metal ceramic power machinery product comprises the steps:

(1) molten alloy, the composition of alloy: weight %

Aluminium 50-70

Zinc 15-30

Titanium 0.5-5

Copper 1-8

Silicon 5-10

Nitrogen 0.005-0.03

The melting technology of alloy is a traditional method, adds nitrogen during smelting temperature 〉=1500 ℃,

(2) alloy is cast into the workpiece blank 1600 ℃-1800 ℃ the time, with blank by being machined into workpiece,

(3) with the workpiece differential arc oxidation, be about to workpiece as anode, stainless steel plate is as catholyte, the consisting of of electrolytic solution: K ₂SiO ₃5-10g/L, Na ₂O ₂4-6g/L, NaF 0.5-1g/L, CH ₃COONa 2-3g/L, Na ₃VO ₃1-3g/L, electrolytic solution pH are 11-13, and temperature is 20-50 ℃, and electrolysis mode rises to 300V for elder generation rapidly with voltage, and keeps 5-10s, then anode voltage is risen to 450V, electrolysis 5-10min, and cleaning, aftertreatment get finished product; Perhaps with workpiece as anode, stainless steel plate is as negative electrode, the first step is with the K of workpiece at 200g/L ₂OnSiO ₂In the aqueous solution with 1A/dm ³Anodic current handle 5min, second step is with the Na of workpiece washing back at 70g/L ₃P ₂O ₇In the aqueous solution with 1A/dm ³Anodic current handle 15min, solution temperature is 20-50 ℃.

The base material tensile strength of finished product is 300-480MPa, and surface hardness is HV800-2500, and matrix and top coat critical load LC are 30-40N.

Adopt mechanical component that the technology of the present invention produces because nitrogen and the part metals chemical combination that adds during melting, increased the intensity of base material, base material tensile strength is 300-480MPa; After differential arc oxidation is handled, surface hardness can be, HV800-2500, the matrix of part and top coat critical load Lc can reach 40N, part can satisfy the high pressure operating mode; Solidity to corrosion, neutral salt spray test reach 2000 hours.Part can have the operating pressure of 480MPa, 500 ℃ envrionment temperature at the same time, and the pH value is the highly basic of 9-14 or the strong acid of pH value＜5, with hardness be long-time steady operation under the condition of working medium of HV800-2500.Can promote the power machinery product quality significantly, guarantee product long-time steady operation under the working condition requirement condition of high temperature, high pressure, high burn into high abrasion.

Produce in one's power with present method that the power machine part can replace traditional material, as: high temperature resistant high hardness alloy, steel alloy, rich chromium cast iron etc., it is simple to have complete processing, and equipment and material use efficiency height are with short production cycle, and production cost is than the low 20-40% of tradition.Part improves 2-5 doubly as improving 2-5 doubly than traditional oil well mud slurry pump cylinder jacket than traditional Sweet natural gas, gasoline engine cylinder sleeve work-ing life work-ing life.Can be widely used in piston, piston ring, cylinder body, valve body of power machinery product etc.

Embodiment:

Embodiment 1:

The present invention is the aluminium with 50%, 30% zinc, 5% titanium, 8% copper, 6.97% silicon, 0.03%

The present invention is aluminium, 30% zinc, 5% titanium, 8% copper, 6.97% the silicon with 50%, the alloy that 0.03% nitrogen is formed, and proportion is between the 3.0-4.0.

1700 ℃ of the pouring temperatures of alloy, manufacturing process is: model cast molding blank → rough turn → finish turning → cold extrusion → polish → eliminate oil → cleaning → differential arc oxidation → cleaning → aftertreatment → inspection after construction.

Differential arc oxidation electrolytic solution is formed and processing condition:

Electrolytic solution is formed: K ₂SiO ₃5-10g/L, Na ₂O ₂4-6g/L, NaF 0.5-1g/L, CH ₃COONa 2-3g/L, Na ₃VO ₃1-3g/L, pH value of solution are 11-13, and temperature is 20-50 ℃; Cathode material is a stainless steel plate; Electrolysis mode rises to 300V for elder generation rapidly with voltage, and keeps 5-10s, then anodic oxidation voltage is risen to 450V, electrolysis 5-10min.

Embodiment 2:

The present invention is aluminium, 25% zinc, 0.5% titanium, 4.495% copper, 10% the silicon with 60%, the alloy that 0.005% nitrogen is formed, or with 70% aluminium, 14.5% zinc, 4.49% titanium, 1% copper, 10% silicon, the alloy that 0.01% nitrogen is formed.Melting technology is traditional melting method, adds nitrogen in the time of 1600 ℃, and at 1700 ℃ of casting workpiece blanks, the working method of blank is with embodiment 1, and just differential arc oxidation is handled the two one-step electrolysis methods of employing, the first step: with the K of workpiece at 200g/L ₂OnSiO ₂In the aqueous solution with 1A/dm ³Anodic current 5 handle min, second step: will be through the washing of the workpiece behind the first step differential arc oxidation back Na at 70g/L ₃P ₂O ₇In the aqueous solution with 1A/dm ³Anodic current handle 15min, cathode material is: stainless steel plate: solution temperature is 20-50 ℃.

Mao power source equipment:

Mao power source equipment is the special high-power DC power supply equipment that a kind of direct current of high-voltage great-current output adds positive pulse, negative pulse, and output voltage range is generally 0～600V; The capacity of outward current is decided on the surface-area of processing work.

Claims

(1) molten alloy, the composition of alloy: weight %

Aluminium 50-70

Zinc 1 5-30

Titanium 0.5-5

Copper 1-8

Silicon 5-10

Nitrogen 0.005-0.03

(3) with the workpiece differential arc oxidation, be about to workpiece as anode, stainless steel plate is as catholyte, the consisting of of electrolytic solution: K ₂SiO ₃5-10g/L, Na ₂O ₂4-6g/L, NaF0.5-1g/L, CH ₃COONa 2-3g/L, Na ₃VO ₃1-3g/L, electrolytic solution pH are 11-13, and temperature is 20-50 ℃, and electrolysis mode rises to 300V for elder generation rapidly with voltage, and keeps 5-10s, then anode voltage is risen to 450V, electrolysis 5-10min, and cleaning, aftertreatment get finished product; Perhaps with workpiece as anode, stainless steel plate is as negative electrode, the first step is with the K of workpiece at 200g/L ₂OnSiO ₂In the aqueous solution with 1A/dm ³Anodic current handle 5min, second step is with the Na of workpiece washing back at 70g/L ₃P ₂O ₇In the aqueous solution with 1A/dm ³Anodic current handle 15min, solution temperature is 20-50 ℃.

2, method according to claim 1, the base material tensile strength that it is characterized in that finished product is 300-480MPa, and surface hardness is HV800-2500, and matrix and top coat critical load LC are 30-40N.