CN101863621A - Water-soluble phosphate lubricating glass and preparation method thereof - Google Patents

Abstract

The invention relates to water-soluble phosphate lubricating glass and a preparation method thereof. The glass comprises the following raw materials in percentage by mole: 50 to 75 percent of P2O5, 5 to 30 percent of K2O, 5 to 30 percent of Na2O, 0.1 to 10 percent of B2O3, 0.1 to 5 percent of ZnO and 0.1 to 5 percent of Al2O3. The preparation method comprises the steps of weighing, mixing, smelting, casting, ball milling and packing. The preparation method has the advantages of reducing an extrusion force, prolonging the service life of a die, improving the quality of a product and improving the workshop environment; and the product has surface finish, is smooth, has no scratch and has the characteristics of good stability.

Description

A kind of water-soluble phosphate lubricating glass and preparation method thereof

[technical field]

The present invention relates to the frit field, specifically, is a kind of water-soluble phosphate lubricating glass and preparation method thereof.

[background technology]

Play the glass that prevents metal oxidation when heating simultaneously as lubricant, its Chemical Composition should guarantee to have inertia with hot metallic contact the time.Can have enough firmly plasticity glass-film in metal surface formation in given temperature with in service time.So select the foundation of glass lubricant composition to be: the viscosity of (1) glass melt should present less variation with temperature, can enlarge the temperature range of extrusion operation like this, helps improving lubricity; (2) chemical stability is good, with metal such as steel react with not, preventing the reduction of lubricity and metal strength, and can prevent to preserve and the decomposition when using and rotten; (3) good with the wettability of metallic substance such as steel, have excellent lubricating properties.

Except that the composition of glass, the softening temperature of the character of the viscosity of lubricant, the coefficient of expansion, lubricant coating and glass under the thermal distortion service temperature all has very big influence to extrusion process.Wherein, the viscosity of glass melt has the meaning of particularly important, and it is permanent more that its viscosity number remains on time of (about 1000 pools) in the desired scope, and then extrusion process is stable more, and is lubricated effective more.

Mean pressure when adopting glass lubricant can make extruding is done and is reduced by 13～15%, during die forging, coefficient of friction can reduce by 1/2～1/3 than the right black lubricant of general employing.Thereby, use glass lubricant, the homogeneous deformation of goods can not only be guaranteed, and the work-ing life of instrument can be prolonged.The workpiece that scribbles glass lubricant is after die forging, still stay one deck glass film on the forging surface, remove glass coating and, do not find the corrosion mottling on the forging surface through sandblast, the effect that this has just proved glass profit agent good lubricating effect and has prevented burning by after the thermal treatment.

The water-soluble lubricating glass that uses in the past has the shortcoming of poor stability, and after water-soluble glass dissolve in water, short then a few hours, the long then a few days crystallization occurred and becomes salt, and stability does not reach requirement, as lubricant and releasing agent application inconvenience.

Special fair 7-112935 proposes a kind of improved phosphate system glass lubricant, and its compositing range mass percent is P ₂O ₅Be 20～70%, B ₂O ₃Be 0～60%, R ₂O is 8～50%, ammonia or amine＞0.5% is characterized at first being melting into according to conventional method it being dissolved in the aqueous solution that contains ammonia or amine the phosphate glass of no ammonia then, employed amine comprises primary amine, secondary amine and tertiary amine, but the chemical stability deficiency of this glass lubricant.

The special public clear 58-49504 of Japanese industry technology institute proposes to be used for the water-soluble phosphate lubricating glass of forging brass workpiece, glass is soluble in water, make the aqueous solution of 20% mass percent, be applied on 700～800 ℃ the mould, moisture evaporation, glass forms epithelium, viscosity is approximately from tens of handkerchief second to hundreds of handkerchief second, play the effect of lubricant and releasing agent simultaneously, roughing and precision work all can be used, such glass lubricates extruder chamber and extrusion die in the middle of also being applicable to expressing technique, but the deficiency of its chemical stability has influenced its application.

The collaborative special fair 7-41781 of grease (strain) of Japan proposes a kind of lubricating grease of phosphate-containing glass micro mist, and the compositing range molecule percentage of its glass is P ₂O ₅Be 45～75%, M ₂O is 10～35% (M is alkali metal), B ₂O ₃Be 0～45%, be characterized in that outward appearance is white in color or canescence, do not pollute operating environment, and price is lower, compare with existing lubricating grease, have good anti-loading, but the deficiency of its chemical stability has affected its application.

[summary of the invention]

The objective of the invention is to overcome the deficiency of existing lubricating glass, a kind of water-soluble phosphate lubricating glass and preparation method thereof is provided, have the characteristics of good stability.

The objective of the invention is to be achieved through the following technical solutions:

A kind of water-soluble phosphate lubricating glass, raw material is by mole% consisting of P ₂O ₅Be 50～75%, K ₂O is 5～30%, Na ₂O is 5～30%, B ₂O ₃Be that 0.1～10%, ZnO is 0.1～5%, Al ₂O ₃Be 0.1～5%;

Described P ₂O ₅Be preferably 55～70%, the best is 63%;

Described K ₂O is preferably 15～25%, and the best is 16%;

Described Na ₂O is preferably 10～25%, and the best is 14%;

Described B ₂O ₃Be preferably 0.1～10%, the best is 4%;

Described ZnO is preferably 0.5～3%, and the best is 2%;

Described Al ₂O ₃Be preferably 0.5～3%, the best is 1%;

A kind of preparation method of water-soluble phosphate lubricating glass may further comprise the steps:

(1) weight percent according to each component takes by weighing each raw material;

(2) with the raw material thorough mixing that is taken by weighing;

(3) mixed compound is put into crucible, put into furnace temperature then and be 900 ℃～1150 ℃ electric furnace, insulation 0.5～1h;

(4) glass metal after will melting is poured tabletting machine into and is pressed into thin slice or pours in the cold water or be cast into certain shape;

(5) sheet or granular glass are put into the ball mill ball milling together;

(6) glass powder behind the ball milling is sieved, detects, packs.

B ₂O ₃Be the formation oxide of glass, it is with boron oxygen triangle body [BO ₃] and boron oxygen tetrahedron [BO ₄] be structural component, in borosilicate glass, jointly form structural network, B with silicon-oxy tetrahedron ₂O ₃Can reduce the coefficient of expansion of glass, improve heat endurance, the chemical stability of glass, increase the refractive index of glass, improve the gloss of glass, improve the mechanical performance of glass.B ₂O ₃When high temperature, can reduce the viscosity of glass, when low temperature, then improve the viscosity of glass, so contain B ₂O ₃Higher glass, the temperature range of formation is narrower.Work as B ₂O ₃Introducing is measured when too high, because boron oxygen triangle body [BO ₃] increase, the coefficient of expansion of glass increases on the contrary, and abnormal phenomena takes place.B ₂O ₃Also play the effect of flux, accelerate the clarification of glass and the crystallizing power of reduction glass.But B ₂O ₃Often with steam volatilization, on the borosilicate glass liquid level because of B ₂O ₃Volatilization reduce, can produce and be rich in SiO ₂Crystallization material skin, therefore, melting time can not be long, test finds that melting time can not greater than 80min, guarantee in the good situation of glassy state that melting time is more short more good.Along with B ₂O ₃The increase of content, softening point reduces, the B of glass ₂O ₃If content is less than 1wt%, it is unstable that glass can become.

ZnO is an intermediate oxide, in the ordinary course of things, and with zinc oxygen octahedra [ZnO ₈] exist as network modifying oxide, when the free oxygen in the glass is enough, can form zinc oxygen tetrahedron [ZnO ₄] and enter the structural network of glass, make the structure of glass more stable.ZnO can reduce the thermal coefficient of expansion of glass, improves chemical stability and the heat endurance of glass, refractive index.If it is not obvious that ZnO content is lower than 1% effect, be higher than 50wt%, it is unstable that glass can become.ZnO reduces the thermal expansivity of glass.

Al ₂O ₃Adding can reduce the tendency towards devitrification of glass, improve chemical stability, heat endurance, mechanical strength, hardness and the refractive index of glass, can be used to regulate the coefficient of expansion and the sealing temperature of glass.Al ₂O ₃Increase chemical stability, heat endurance and the acid resistance of glass, reduce crystallization, the Al of glass ₂O ₃Content is no more than 5wt%, Al ₂O ₃Content surpasses 5wt% can cause instability.

The positively effect of a kind of water-soluble phosphate lubricating glass of the present invention and preparation method thereof is:

(1) the present invention has reduced squeeze;

(2) the present invention has prolonged the work-ing life of mould;

(3) the present invention has improved quality product, and product surface is bright and clean, smooth, no marking;

(4) the present invention has improved workshop condition.

[description of drawings]

Fig. 1 preparation technology's schema of the present invention;

[embodiment]

The embodiment of a kind of water-soluble phosphate lubricating glass of the present invention and preparation method thereof below is provided.

Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.

Embodiment 1

One, raw material forms by mole% being:

P ₂O ₅Be 63%, K ₂O is 16%, Na ₂O is 14%, B ₂O ₃Be that 4%, ZnO is 2%, Al ₂O ₃Be 1%.

Two, preparation method:

(1) weight percent according to each component takes by weighing each raw material;

(2) with the raw material thorough mixing that is taken by weighing;

(3) mixed compound is put into crucible, put into furnace temperature then and be 1000 ℃ electric furnace, insulation 0.6h;

(4) glass metal after will melting is poured tabletting machine into and is pressed into thin slice or pours in the cold water or be cast into certain shape;

(5) sheet or granular glass are put into the ball mill ball milling together;

(6) glass powder behind the ball milling is sieved, detects, packs.

Three, test result:

With the glass dust of preparation, the water with 30% dissolves fully, and the stability of solution surpasses 150 days, and its viscosity can not be surveyed after 20 days.

Embodiment 2

One, raw material forms by mole% being:

P ₂O ₅Be 52%, K ₂O is 24%, Na ₂O is 15%, B ₂O ₃Be that 6%, ZnO is 2%, Al ₂O ₃Be 1%.

Two, preparation method:

(1) weight percent according to each component takes by weighing each raw material;

(2) with the raw material thorough mixing that is taken by weighing;

(3) mixed compound is put into crucible, put into furnace temperature then and be 950 ℃ electric furnace, insulation 0.5h;

(4) glass metal after will melting is poured tabletting machine into and is pressed into thin slice or pours in the cold water or be cast into certain shape;

(5) sheet or granular glass are put into the ball mill ball milling together;

(6) glass powder behind the ball milling is sieved, detects, packs.

Three, test result:

With the glass dust of preparation, the water with 30% dissolves fully, and the stability of solution surpasses 120 days, and its viscosity can not be surveyed after 30 days.

Embodiment 3

One, raw material forms by mole% being:

P ₂O ₅Be 74%, K ₂O is 8%, Na ₂O is 9%, B ₂O ₃Be that 6%, ZnO is 2%, Al ₂O ₃Be 1%.

Two, preparation method:

(1) weight percent according to each component takes by weighing each raw material;

(2) with the raw material thorough mixing that is taken by weighing;

(3) mixed compound is put into crucible, put into furnace temperature then and be 900 ℃ electric furnace, insulation 0.5h;

(4) glass metal after will melting is poured tabletting machine into and is pressed into thin slice or pours in the cold water or be cast into certain shape;

(5) sheet or granular glass are put into the ball mill ball milling together;

(6) glass powder behind the ball milling is sieved, detects, packs.

Three, test result:

With the glass dust of preparation, the water with 30% dissolves fully, and the stability of solution surpasses 100 days, and its viscosity can not be surveyed after 14 days.

Embodiment 4

One, raw material forms by mole% being:

P ₂O ₅Be 67%, K ₂O is 15%, Na ₂O is 12%, B ₂O ₃Be that 3%, ZnO is 2%, Al ₂O ₃Be 1%.

Two, preparation method:

(1) weight percent according to each component takes by weighing each raw material;

(2) with the raw material thorough mixing that is taken by weighing;

(3) mixed compound is put into crucible, put into furnace temperature then and be 1150 ℃ electric furnace, insulation 0.7h;

(4) glass metal after will melting is poured tabletting machine into and is pressed into thin slice or pours in the cold water or be cast into certain shape;

(5) sheet or granular glass are put into the ball mill ball milling together;

(6) glass powder behind the ball milling is sieved, detects, packs.

Three, test result:

With the glass dust of preparation, the water with 30% dissolves fully, and the stability of solution surpasses 100 days, and its viscosity can not be surveyed after 14 days.

Embodiment 5

One, raw material forms by mole% being:

P ₂O ₅Be 60%, K ₂O is 25%, Na ₂O is 10%, B ₂O ₃Be that 3%, ZnO is 1%, Al ₂O ₃Be 1%.

Two, preparation method:

(1) weight percent according to each component takes by weighing each raw material;

(2) with the raw material thorough mixing that is taken by weighing;

(3) mixed compound is put into crucible, put into furnace temperature then and be 950 ℃ electric furnace, insulation 0.8h;

(4) glass metal after will melting is poured tabletting machine into and is pressed into thin slice or pours in the cold water or be cast into certain shape;

(5) sheet or granular glass are put into the ball mill ball milling together;

(6) glass powder behind the ball milling is sieved, detects, packs.

Three, test result:

With the glass dust of preparation, the water with 30% dissolves fully, and the stability of solution surpasses 120 days, and its viscosity can not be surveyed after 17 days.

Embodiment 6

One, raw material forms by mole% being:

P ₂O ₅Be 65%, K ₂O is 9%, Na ₂O is 20%, B ₂O ₃Be that 4%, ZnO is 1%, Al ₂O ₃Be 1%.

Two, preparation method:

(1) weight percent according to each component takes by weighing each raw material;

(2) with the raw material thorough mixing that is taken by weighing;

(3) mixed compound is put into crucible, put into furnace temperature then and be 1050 ℃ electric furnace, insulation 0.6h;

(4) glass metal after will melting is poured tabletting machine into and is pressed into thin slice or pours in the cold water or be cast into certain shape;

(5) sheet or granular glass are put into the ball mill ball milling together;

(6) glass powder behind the ball milling is sieved, detects, packs.

Three, test result:

With the glass dust of preparation, the water with 30% dissolves fully, and the stability of solution surpasses 150 days, and its viscosity can not be surveyed after 25 days.

It should be noted last that: above embodiment only is illustrative rather than definitive thereof technical scheme of the present invention, although the present invention is had been described in detail with reference to the foregoing description, those of ordinary skill in the art is to be understood that, still can make amendment or be equal to replacement the present invention, and not breaking away from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.

Claims (8)

1. a water-soluble phosphate lubricating glass is characterized in that, raw material is by mole% consisting of P ₂O ₅Be 50～75%, K ₂O is 5～30%, Na ₂O is 5～30%, B ₂O ₃Be that 0.1～10%, ZnO is 0.1～5%, Al ₂O ₃Be 0.1～5%.

2. a kind of water-soluble phosphate lubricating glass as claimed in claim 1 is characterized in that, described P ₂O ₅Be 55～70%, described K ₂O is 15～25%.

3. a kind of water-soluble phosphate lubricating glass as claimed in claim 2 is characterized in that, described P ₂O ₅Be 63%, described K ₂O is 16%.

4. a kind of water-soluble phosphate lubricating glass as claimed in claim 1 is characterized in that, described Na ₂O is 10～25%, described B ₂O ₃Be 0.1～10%.

5. a kind of water-soluble phosphate lubricating glass as claimed in claim 4 is characterized in that, described Na ₂O is 14%, described B ₂O ₃Be 4%.

6. a kind of water-soluble phosphate lubricating glass as claimed in claim 1 is characterized in that, described ZnO is 0.5～3%, described Al ₂O ₃Be 0.5～3%.

7. a kind of water-soluble phosphate lubricating glass as claimed in claim 6 is characterized in that, described ZnO is 2%, described Al ₂O ₃Be 1%.

8. the preparation method of a kind of water-soluble phosphate lubricating glass as claimed in claim 1 is characterized in that, comprises the steps:

(1) weight percent according to each component takes by weighing each raw material;

(2) with the raw material thorough mixing that is taken by weighing;

(3) mixed compound is put into crucible, put into furnace temperature then and be 900 ℃～1150 ℃ electric furnace, insulation 0.5～1h;

(4) glass metal after will melting is poured tabletting machine into and is pressed into thin slice or pours in the cold water or be cast into certain shape;

(5) sheet or granular glass are put into the ball mill ball milling together;

(6) glass powder behind the ball milling is sieved, detects, packs.

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