CN101922005A - High-temperature bluing method of long and large part - Google Patents
High-temperature bluing method of long and large part Download PDFInfo
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Abstract
The invention discloses a high-temperature bluing method of a long and large part, which comprises: placing a support on the bottom of a bluing tank, determining a preset bluing temperature and preset bluing time, preparing bluing solution, aging the bluing solution, preheating the washed long and large part, placing the preheated part on the support for bluing, setting the temperature of the bluing solution when the part enters the tank at the highest value of the preset bluing temperature, taking the part out of the tank slowly after the bluing is finished, washing the surface of the part with at least three water heads at the same time, transferring the part to a clear water tank after the part is taken out of the tank completely, washing off the alkaline bluing solution on the surface of the part completely, placing the long and large part washed completely by clear water on a wooden sleeper with a wrapping cloth pad, checking the long and large part, and applying oil onto the long and large part is the long and large part is qualified. The method has the advantages that: the structure is simple; the operation is simple and the washing effect is good; and a high-quality blued film can be formed on the long and large part conveniently, and the blued film is more compact, firmer and more alkaline corrosion resistant.
Description
Technical field
The present invention relates to a kind of high temperature method of turning blue, relate in particular to a kind of high temperature of growing up part part method of turning blue, be applicable to that specifically the high temperature that length surpasses the part part of growing up more than two meters turns blue.
Background technology
Turning blue is meant and steel is heated in air or directly is dipped in the dense oxidizing solution, makes its surface produce the material protection technology of oxide film as thin as a wafer, also claims blackout.Turning blue of steel-iron components can be carried out in the melting salt of Sodium Nitrite and SODIUMNITRATE, also can carry out in high-temperature hot air and the superheated vapour more than 500 ℃, more usually heats in being added with the dense caustic soda of Sodium Nitrite.Solution composition when turning blue, temperature of reaction and time decide according to the composition of steel substrate.The composition of film of turning blue is a martial ethiops, and thickness is 1.5 microns of 0.5 –, and color is relevant with material composition and processing condition, and greyish black, pitch black, light blue etc. is arranged.
The Chinese patent publication number is CN101497995A, the patent of invention that open day is on August 5th, 2009 discloses a kind of blackening process for hot die steel, this technology comprises: to the pre-treatment of hot-work die steel, hot-work die steel through pre-treatment is handled through once turning black by technical process, hot water wash, pickling, cold wash, the secondary blackout is handled, hot water wash, post bake is handled, cold wash, three times blackout is handled, saponification, hot water wash, dry, immersion oil is finished the blackout to hot-work die steel, it is under the temperature condition more than 155 ℃ that blackout is handled, hot-work die steel is placed sodium hydroxide, 60 – 70 minutes in the mixed solution of nitrite and iron ion additive, concentration sodium hydroxide is 500 – 700g/l in the mixed solution, the concentration of nitrite is 250 – 400g/l, and the concentration of iron ion additive is 0.9 –, 1.5 g/l.Though this invention can be turned black to hot-work die steel, and the blackout layer of formation good bonding strength, but its scope of application is narrower, only be applicable to hot-work die steel, and only be applicable to the hot-work die steel part of common size, do not consider the large-size part, as length is the part more than two meters and the difference of turning blue of common parts, thereby make that the turning blue of part part of growing up after turning blue with this method is second-rate, the film that turns blue is more crisp, in uneven thickness, in use occur the alkaline etching phenomenon easily, and then destroy the layer that turns blue, breaking-up part.
Summary of the invention
The objective of the invention is to overcome the turning blue of part part of growing up that exists in the prior art is second-rate, be prone to the alkaline etching phenomenon defective and problem, the high temperature that provides a kind of quality of turning blue of the part part of growing up better, not to be prone to the part part of growing up of the alkaline etching phenomenon method of turning blue.
For realizing above purpose, technical solution of the present invention is: a kind of high temperature of growing up part part method of turning blue, and this method may further comprise the steps successively:
The first step: place upholder: place upholder in the bottom of the groove that turns blue earlier, this upholder is the low structure of the high end of an end, the inclination angle of its low side, the line between high-end and the trench bottom that turns blue is more than or equal to 10 degree, low side and the spacing distance of trench bottom of turning blue be more than or equal to 10cm, and be circular arc with the contacted contact surface of part part of growing up on the upholder;
Second step: the preparation liquid that turns blue: the starting material of the part part of growing up that turns blue as required earlier determine that the predetermined temperature of turning blue turns blue the time with predetermined, in the groove that turns blue, prepare the liquid that turns blue then, concentration sodium hydroxide is 600 – 700g/l in this liquid that turns blue, the concentration of Sodium Nitrite is 150 – 200g/l, some odd parts is put into the liquid slaking so that this turns blue of turning blue repeatedly of this liquid that turns blue after the preparation again;
The 3rd step: high temperature turns blue: the part part oil removing of growing up that needs are turned blue earlier, rust cleaning clean up, then the clean part part of growing up is put into hot water and carry out preheating, the temperature of hot water is 100 ℃ of 80 –, be 5 – 15 minutes warm up time, again the part part of growing up after the preheating is shelved on the upholder in the groove that turns blue, the turn blue temperature of liquid of the groove that turns blue when putting into is the maximum of the predetermined temperature of turning blue of this part part of growing up, the processing of turning blue then, and the time of turning blue turns blue the time for predetermined;
The 4th step: the part part of growing up goes out groove: after the processing of turning blue finishes, the part part of will growing up takes out from the groove that turns blue, take-off speed should be less than 50mm/ second, simultaneously, wash piece surface simultaneously with at least three heads, keep the wetting in case alkaline liquid drying of turning blue of workpiece surface on the face of turning blue, the flushing angle of head is 20 Du –, 90 degree, if head is fixing head, then its flushing piece surface scope is no more than 500 * 500mm, and for can swing head, then its flushing piece surface scope is no more than 2000mm * 500mm as if head, after part goes out groove fully, again part is changed in the Rinsing Area and its lip-deep alkalescence liquid that turns blue is cleaned up;
The 5th step: subsequent disposal: the part part of growing up that will clean up earlier is shelved on the sleeper that is lined with infantees in case the film that turns blue of damaging is tested oiling after the assay was approved then to the part part of growing up;
Described check comprises turn blue film inspection and protective capacities inspection, and the film inspection of turning blue is meant that the part after turning blue does not allow the part not have adularescent or green dust on turn blue film or the film, but can allow the slight red dust of wiping; Described protective capacities inspection is meant drips 2 of 1 – with in the cupric oxide and 3% the copper sulfate CuSO that crosses on the part after turning blue
45H
2O solution, 30 second post-flush clean, it is then qualified pink not occur as test surfaces.
The manufactured materials of above support is an iron.
Described the first step low and middle-end, the line between high-end are 20 degree with the inclination angle of the trench bottom that turns blue.
The starting material of the described part part of growing up that turns blue as required determine that the predetermined temperature of turning blue was meant with the predetermined time of turning blue:
When starting material were cast iron, the predetermined temperature of turning blue of the part part of growing up was 138 ℃ of 135 –, and the predetermined time of turning blue is 90 – 120 minutes;
When starting material when being carbon content greater than 0.7% carbon steel, the predetermined temperature of turning blue of the part part of growing up is 140 ℃ of 138 –, and the predetermined time of turning blue is 60 – 90 minutes;
When starting material were the carbon steel of carbon content 0.4% – 0.7%, the predetermined temperature of turning blue of the part part of growing up was 142 ℃ of 138 –, and the predetermined time of turning blue is 60 – 90 minutes;
When starting material when being carbon content less than 0.4% carbon steel, the predetermined temperature of turning blue of the part part of growing up is 145 ℃ of 140 –, and the predetermined time of turning blue is 60 – 90 minutes;
When starting material were steel alloy, the predetermined temperature of turning blue of the part part of growing up was 145 ℃ of 140 –, and the predetermined time of turning blue is 60 – 90 minutes;
When starting material were rapid steel, the predetermined temperature of turning blue of the part part of growing up was 138 ℃ of 135 –, and the predetermined time of turning blue is that classification is turned blue, each 30 minutes.
The temperature of hot water is 90 ℃ in described the 3rd step, and be 10 minutes warm up time.
The temperature fluctuation of liquid turn blue in described the 3rd step high temperature process of turning blue smaller or equal to 5 ℃.
The described second step preparation is turned blue during liquid or the 3rd step high temperature turns blue, and when temperature is turned blue on the low side and influence when alkali concn in the liquid that turns blue, adds sodium hydroxide with the turn blue temperature of liquid of raising, adds 10 gram sodium hydroxide in every liter of solution and can improve 1 ℃ of solution temperature.
The quantity of head is 12 in described the 4th step.
The flushing angle of described head is 45 degree.
Compared with prior art, beneficial effect of the present invention is:
1. because turning blue, a kind of high temperature of growing up the part part of the present invention is provided with upholder in the bottom of the groove that turns blue in the method, this upholder is the low structure of the high end of an end, its low side, the line between high-end and the inclination angle on ground are more than or equal to 10 degree, the spacing distance of the low side and the trench bottom that turns blue is more than or equal to 10cm, when thereby the part part that can guarantee to grow up is shelved on the upholder, part distance is turned blue the bottom of groove more than or equal to 10cm, can effectively avoid part to contact, processing thereby the entire structure of guaranteeing part can both be turned blue fully with the throw out of the trench bottom that turns blue; The inclination angle of low side on the upholder, the line between high-end and the trench bottom that turns blue is more than or equal to 10 degree, when the part part that can guarantee to grow up is shelved on the upholder, part is spent more than or equal to 10 with the angle of the trench bottom that turns blue, be preferably 20 degree, the design at this kind inclination angle both can guarantee the smooth and easy mobile of liquid that turn blue, help turning blue of part, also can effectively reduce the inclination angle when big, the also corresponding bigger operation easier of bringing in the required space of turning blue of the part part of growing up; The manufactured materials of upholder is generally elected iron as, stop easy dissolved material in highly basic such as copper, aluminium, thereby guarantee the stability of upholder in the liquid that turns blue, and be circular arc with the contact surface of part on the upholder, no acute angle can guarantee that not only part is shelved on the stability on the upholder, and helps the upset of part on upholder in the process of turning blue, be that turning operation is simpler and easy, and do not damage the piece surface and the film that turns blue.Therefore the present invention not only help growing up carrying out that the part part turns blue, help the turn blue formation of film of high-quality, and simple in structure, operation is simple and easy.
2. because turning blue in the method after preparing the liquid that turns blue, a kind of high temperature of growing up the part part of the present invention the liquid that turns blue has been carried out maturation process by some odd parts being put into the method that this liquid that turns blue turns blue repeatedly, contained a spot of iron in the liquid that turns blue thereby make, this can make the film that turns blue fine and close more and firm; And, turning blue, concentration sodium hydroxide is 600 – 700g/l in the liquid, the concentration of Sodium Nitrite is 150 – 200g/l, concentration ratio is suitable, both helped improving oxidation rate, promote the to turn blue formation of film can not destroy the film that turns blue owing to concentration is too high again, thereby make that the rete that turns blue that forms is fine and close and firm; In addition, before turning blue, determine predetermined turn blue temperature and predetermined turning blue the time among the present invention according to the manufactured materials of the part part of growing up, that especially takes in the predetermined time ratio prior art of turning blue among the present invention has turned blue time lengthening one to six times, carbon content is high more in the starting material, time expand, is long more, the reason that prolongs is that the object that turns blue that the present invention is suitable for is a length greater than two meters the part part of growing up, prolonging each part that the time of turning blue helps on the one-piece construction of part can both fully turn blue, thereby forms the fine film that turns blue.Therefore the present invention's turn blue formation of film of high-quality on the part part that helps growing up, the film that turns blue of formation fine and close more with firmly.
3. because turning blue in the method, a kind of high temperature of growing up the part part of the present invention carrying out high temperature when turning blue, two control elementss have been increased, one is that the part of growing up is carried out preheating, and another is that the part part of growing up is put into when turning blue groove, and the temperature of the liquid that turns blue is the maximum of the predetermined temperature of turning blue.The purpose that the part of growing up is carried out preheating is the temperature difference that reduces part and turn blue liquid, is controlled in 5 degree with the temperature fluctuation of the liquid of guaranteeing to turn blue; The purpose of putting into the part of growing up during the maximum of the predetermined temperature of turning blue is to put into when turning blue liquid when the colder part of growing up, the decline of the temperature of liquid also can be in the working range of the predetermined temperature of turning blue even turn blue, effectively avoid being lower than predetermined turn blue temperature and temperature fluctuation and surpassed 5 degree, and the highest temperature can not be too high, otherwise can influence the quality of the film that turns blue; By these two control elementss as seen, the present invention can guarantee in the process of turning blue, the temperature fluctuation of liquid of turning blue is controlled in 5 degree, in addition, when turning blue for strength of solution and temperature are kept within the specific limits, should be as far as possible in operating process make up water not, if but must make up water, also should follow on a small quantity repeatedly principle, the temperature fluctuation that this principle is served the liquid that turns blue is controlled in 5 degree; By on can get, the present invention's be devoted to turn blue temperature fluctuation of liquid is controlled in 5 degree, this kind design helps at the uniform velocity carrying out of the process of turning blue, thereby guarantees that the film that turns blue that forms is even, fine and close, has the ability of alkali resistant erosion preferably.Therefore the film that turns blue of the present invention's formation is more even, fine and close, and alkali resistant erosion ability is stronger.
Since a kind of high temperature of growing up the part part of the present invention turn blue in the method turn blue finish after, the part of growing up after will turning blue takes out in the process of the groove that turns blue, by a plurality of heads the part of growing up is washed, and be no more than 500 * 500mm according to the scope of fixing head flushing piece surface, the control that the surface range that can swing head flushing part is no more than 2000mm * 500mm requires and the surface-area of the part of growing up calculates the quantity of the head that needs, thereby guarantee in the process that the part part of growing up takes out, each face of part part of growing up can both be washed fully, can guarantee the wetting of part piece surface that grow up, thereby can be on the face of turning blue with the basic solution drying, except the quantity to head has the requirement, the flushing angle that also requires head is 20 Du –, 90 degree, be preferably 45 degree, and the take-off speed of part is less than 50mm/ second owing to grow up, therefore flush time is decided according to the length of the part of growing up, the long more then flush time of the part of growing up is long more, this flushing design of the present invention the wetting of part piece surface that grow up in the time of can guaranteeing groove to the full extent, can effectively avoid the basic solution drying on the face of turning blue, and then the complete and high quality of the film that guarantees to turn blue.Therefore developing result of the present invention is better, can effectively avoid basic solution to damage the film that turns blue.
Embodiment
The present invention is further detailed explanation below in conjunction with embodiment and embodiment
A kind of high temperature of growing up part part method of turning blue, this method may further comprise the steps successively:
The first step: place upholder: place upholder in the bottom of the groove that turns blue earlier, this upholder is the low structure of the high end of an end, the inclination angle of its low side, the line between high-end and the trench bottom that turns blue is more than or equal to 10 degree, low side and the spacing distance of trench bottom of turning blue be more than or equal to 10cm, and be circular arc with the contacted contact surface of part part of growing up on the upholder;
Second step: the preparation liquid that turns blue: the starting material of the part part of growing up that turns blue as required earlier determine that the predetermined temperature of turning blue turns blue the time with predetermined, in the groove that turns blue, prepare the liquid that turns blue then, concentration sodium hydroxide is 600 – 700g/l in this liquid that turns blue, the concentration of Sodium Nitrite is 150 – 200g/l, some odd parts is put into the liquid slaking so that this turns blue of turning blue repeatedly of this liquid that turns blue after the preparation again;
The 3rd step: high temperature turns blue: the part part oil removing of growing up that needs are turned blue earlier, rust cleaning clean up, then the clean part part of growing up is put into hot water and carry out preheating, the temperature of hot water is 100 ℃ of 80 –, be 5 – 15 minutes warm up time, again the part part of growing up after the preheating is shelved on the upholder in the groove that turns blue, the turn blue temperature of liquid of the groove that turns blue when putting into is the maximum of the predetermined temperature of turning blue of this part part of growing up, the processing of turning blue then, and the time of turning blue turns blue the time for predetermined;
The 4th step: the part part of growing up goes out groove: after the processing of turning blue finishes, the part part of will growing up takes out from the groove that turns blue, take-off speed should be less than 50mm/ second, simultaneously, wash piece surface simultaneously with at least three heads, keep the wetting in case alkaline liquid drying of turning blue of workpiece surface on the face of turning blue, the flushing angle of head is 20 Du –, 90 degree, if head is fixing head, then its flushing piece surface scope is no more than 500 * 500mm, and for can swing head, then its flushing piece surface scope is no more than 2000mm * 500mm as if head, after part goes out groove fully, again part is changed in the Rinsing Area and its lip-deep alkalescence liquid that turns blue is cleaned up;
The 5th step: subsequent disposal: the part part of growing up after will cleaning up earlier is shelved on the sleeper that is lined with infantees in case the film that turns blue of damaging is tested oiling after the assay was approved then to the part part of growing up;
Described check comprises turn blue film inspection and protective capacities inspection, and the film inspection of turning blue is meant that the part after turning blue does not allow the part not have adularescent or green dust on turn blue film or the film, but can allow the slight red dust of wiping; Described protective capacities inspection is meant drips 2 of 1 – with in the cupric oxide and 3% the copper sulfate CuSO that crosses on the part after turning blue
45H
2O solution, 30 second post-flush clean, it is then qualified pink not occur as test surfaces.
The manufactured materials of above support is an iron.
Described the first step low and middle-end, the line between high-end are 20 degree with the inclination angle of the trench bottom that turns blue.
The starting material of the described part part of growing up that turns blue as required determine that the predetermined temperature of turning blue was meant with the predetermined time of turning blue:
When starting material were cast iron, the predetermined temperature of turning blue of the part part of growing up was 138 ℃ of 135 –, and the predetermined time of turning blue is 90 – 120 minutes;
When starting material when being carbon content greater than 0.7% carbon steel, the predetermined temperature of turning blue of the part part of growing up is 140 ℃ of 138 –, and the predetermined time of turning blue is 60 – 90 minutes;
When starting material were the carbon steel of carbon content 0.4% – 0.7%, the predetermined temperature of turning blue of the part part of growing up was 142 ℃ of 138 –, and the predetermined time of turning blue is 60 – 90 minutes;
When starting material when being carbon content less than 0.4% carbon steel, the predetermined temperature of turning blue of the part part of growing up is 145 ℃ of 140 –, and the predetermined time of turning blue is 60 – 90 minutes;
When starting material were steel alloy, the predetermined temperature of turning blue of the part part of growing up was 145 ℃ of 140 –, and the predetermined time of turning blue is 60 – 90 minutes;
When starting material were rapid steel, the predetermined temperature of turning blue of the part part of growing up was 138 ℃ of 135 –, and the predetermined time of turning blue is that classification is turned blue, each 30 minutes.
The temperature of hot water is 90 ℃ in described the 3rd step, and be 10 minutes warm up time.
The temperature fluctuation of liquid turn blue in described the 3rd step high temperature process of turning blue smaller or equal to 5 ℃.
The described second step preparation is turned blue during liquid or the 3rd step high temperature turns blue, and when temperature is turned blue on the low side and influence when alkali concn in the liquid that turns blue, adds sodium hydroxide with the turn blue temperature of liquid of raising, adds 10 gram sodium hydroxide in every liter of solution and can improve 1 ℃ of solution temperature.
The quantity of head is 12 in described the 4th step.
The flushing angle of described head is 45 degree.
Principle of the present invention is described as follows:
Sodium hydroxide: the content of sodium hydroxide is relevant with oxidation rate in the liquid that turns blue, the concentration height can be accelerated oxidation rate a bit, film thickness also slightly increases, but high more by no means good more, better suited concentration is 550 –, 700 Ke ∕ liters, the red dust of too high easy formation, loose, porous oxide film, when sodium hydrate content rises above 1100 Ke ∕, just no longer form oxide film, even original existing film also can be dissolved, when sodium hydroxide is too low, not only oxide film approaches and easily grows dim, and barrier propterty is also poor.Must select only content according to the Chemical Composition of part during actually operating: high carbon steel can be used lower sodium hydroxide, and soft steel should adopt higher concentration.
Sodium Nitrite: Sodium Nitrite is the oxygenant in the liquid of turning blue, improving Sodium Nitrite concentration can make solution Central Asia sodium ferrite and sodium ferrite increase, thereby quickening oxidation rate, the oxidation film layer that forms is fine and close and firm, if content of sodium nitrite is low excessively, though then oxide film is thick loose, the consumption of oxygenant itself also can increase, sometimes also can make oxide film ugly sap green occur, content of sodium nitrite is 150 –, 250 Ke ∕ liters usually.
Iron: though iron and being not included within the liquid composition that turns blue must contain a spot of iron in the liquid that turns blue, have only like that, could form densification and in conjunction with firm oxide film at workpiece surface.The liquid iron and cause resulting film very loose for want of that turns blue of new preparation, bonding force with matrix is also very poor, therefore, among the present invention after the liquid that turns blue has just prepared, be not used for immediately the part of growing up is turned blue, but the liquid that turns blue is carried out maturation process by some odd parts being put into the method that this liquid that turns blue turns blue repeatedly, thereby make and contained a spot of iron in the liquid that turns blue, this can make the film that turns blue fine and close more and firm, certainly the content of iron also can not be too high, otherwise can cause the film forming speed of oxide film to descend, and red dust occur on the film.The content of general iron should be controlled in 0.5 –, the 2.0 grams per liter scopes.
The predetermined temperature of turning blue is turned blue the time with predetermined: the temperature and time that turns blue carbon content main and part is relevant, the easy oxidation of the steel that carbon content is high, thereby the temperature that is adopted is lower, time is also shorter, carbon content is low then be difficult for oxidized, used temperature must be high, and the time is also much longer, and medium carbon steel is temperature required to fall between with the time.And the part that turns blue that the present invention is directed to is a length greater than two meters the part of growing up, therefore outside carbon content, also must consider the volume of part, for the whole appearance of the part that guarantees to grow up all can be carried out good turning blue, the time of turning blue must be prolonged, prolonging each part that the time of turning blue helps on the one-piece construction of part can both fully turn blue, the film thereby the formation fine turns blue, that therefore takes in the time ratio prior art of being taked among the present invention of turning blue has turned blue time lengthening one to six times, carbon content is high more in the starting material, and the time of prolongation is long more.
Upholder: in the existing technology of turning blue; the part regular meeting that is shelved in the groove that turns blue occurs and the contacted situation of bottom land contactant; at this moment; owing to exist and the contacted part of throw out on the surface of part; this part can't be turned blue owing to sedimentary just blocking; thereby influence the effect of turning blue of whole part; especially be length greater than growing up during part more than two meters at part; because the volume of part is comparatively huge, if do not take certain measure, its with the groove that turns blue in the also corresponding expansion of sedimentary contact surface; the area that can not turn blue also enlarges thereupon; have a strong impact on the effect of turning blue of the part of growing up, for this reason, the present invention is provided with upholder in the groove that turns blue.
Upholder is the low structure of the high end of an end, the inclination angle on its low side, the line between high-end and ground is more than or equal to 10 degree, the spacing distance of the low side and the trench bottom that turns blue is more than or equal to 10cm, when thereby the part part that can guarantee to grow up is shelved on the upholder, part distance is turned blue the bottom of groove more than or equal to 10cm, can effectively avoid part to contact, processing thereby the entire structure of guaranteeing part can both be turned blue fully with the throw out of the trench bottom that turns blue; The inclination angle of low side on the upholder, the line between high-end and the trench bottom that turns blue is more than or equal to 10 degree, when the part part that can guarantee to grow up is shelved on the upholder, part is spent more than or equal to 10 with the angle of the trench bottom that turns blue, be preferably 20 degree, the design at this kind inclination angle both can guarantee the smooth and easy mobile of liquid that turn blue, help turning blue of part, also can effectively reduce the inclination angle when big, the also corresponding bigger operation easier of bringing in the required space of turning blue of the part part of growing up; The manufactured materials of upholder is generally elected iron as, stop easy dissolved material in highly basic such as copper, aluminium, thereby guarantee the stability of upholder in the liquid that turns blue, and be circular arc with the contact surface of part on the upholder, no acute angle can guarantee that not only part is shelved on the stability on the upholder, and helps the upset of part on upholder in the process of turning blue, be that turning operation is simpler and easy, and do not damage the piece surface and the film that turns blue.This upholder not only help growing up carrying out that the part part turns blue, help the turn blue formation of film of high-quality, and simple in structure, operation is simple and easy.
The temperature fluctuation that high temperature turns blue is controlled in 5 degree: except determining the predetermined temperature of turning blue that high temperature turns blue, in order to obtain better to turn blue effect, emphasize that the temperature fluctuation of the liquid that turns blue must be in 5 degree in the process that high temperature turns blue among the present invention.For reaching this effect, the present invention realizes by two approach: one is that the part of growing up is carried out preheating, and another is that the part part of growing up is put into when turning blue groove, and the temperature of the liquid that turns blue is the maximum of the predetermined temperature of turning blue.The purpose that the part of growing up is carried out preheating is that the temperature difference by reducing part and the liquid that turns blue is controlled in 5 degree with the temperature fluctuation of the liquid of guaranteeing to turn blue; The purpose of putting into the part of growing up during the maximum of the predetermined temperature of turning blue is to put into when turning blue liquid when the colder part of growing up, the decline of the temperature of liquid also can be in the working range of the predetermined temperature of turning blue even turn blue, effectively avoid being lower than predetermined turn blue temperature and temperature fluctuation and surpassed 5 degree, and the highest temperature can not be too high, otherwise can influence the quality of the film that turns blue; In addition, when turning blue for strength of solution and temperature are kept within the specific limits, should be as far as possible in operating process make up water not, if but must make up water, also should follow on a small quantity repeatedly principle, the temperature fluctuation that this principle is served the liquid that turns blue is controlled in 5 degree.By on can get, the present invention's be devoted to turn blue temperature fluctuation of liquid is controlled in 5 degree, this kind design helps at the uniform velocity carrying out of the process of turning blue, thereby guarantees that the film that turns blue that forms is even, fine and close, has the ability of alkali resistant erosion preferably.
The part of growing up goes out poor flushing: the part of growing up after will turning blue among the present invention takes out in the process of the groove that turns blue, by a plurality of heads the part of growing up is washed, and be no more than 500 * 500mm according to the scope of fixing head flushing piece surface, the control that the surface range that can swing head flushing part is no more than 2000mm * 500mm requires and the surface-area of the part of growing up calculates the quantity of the head that needs, promptly determine the quantity of the needed flushing head of this face divided by the flushing area of every kind of head by the surface-area of each face on the part of growing up, thereby guarantee in the process that the part part of growing up takes out, each face of part part of growing up can both be washed fully, can guarantee the wetting of part piece surface that grow up, thereby can be on the face of turning blue with the basic solution drying, except the quantity to head has the requirement, the flushing angle that also requires head is 20 Du –, 90 degree, be preferably 45 degree, and the take-off speed of part is less than 50mm/ second owing to grow up, therefore flush time is decided according to the length of the part of growing up, the long more then flush time of the part of growing up is long more, this flushing design of the present invention can guarantee the wetting of part piece surface that grow up in the groove process to the full extent, can effectively avoid the basic solution drying on the face of turning blue, and then the complete and high quality of the film that guarantees to turn blue.
Embodiment:
Part name: synchronizing shaft, part material: 40Cr, physical dimension: Φ 220 * 6390mm.
This high temperature of growing up part part method of turning blue may further comprise the steps successively:
The first step: place upholder: place upholder in the bottom of the groove that turns blue earlier, this upholder is the low structure of the high end of an end, its low side, the line between high-end are 10 degree with the inclination angle of the trench bottom that turns blue, low side is 10cm with the spacing distance of trench bottom of turning blue, and is circular arc with the contacted contact surface of part part of growing up on the upholder;
Second step: the preparation liquid that turns blue: the starting material of the part part of growing up that turns blue as required earlier determine that the predetermined temperature of turning blue turns blue the time with predetermined, the promptly predetermined temperature of turning blue is 145 ℃ of 140 –, the predetermined time of turning blue is 60 – 90 minutes, in the groove that turns blue, prepare the liquid that turns blue then, concentration sodium hydroxide is 650g/l in this liquid that turns blue, the concentration of Sodium Nitrite is 180g/l, some odd parts is put into the liquid slaking so that this turns blue of turning blue repeatedly of this liquid that turns blue after the preparation again;
The 3rd step: high temperature turns blue: the part part oil removing of growing up that needs are turned blue earlier, rust cleaning clean up, then the clean part part of growing up is put into hot water and carry out preheating, the temperature of hot water is 90 ℃, be 10 minutes warm up time, again the part part of growing up after the preheating is shelved on the upholder in the groove that turns blue, the turn blue temperature of liquid of the groove that turns blue when putting into is the maximum of the predetermined temperature of turning blue of this part part of growing up, promptly 145 ℃, the processing of turning blue then, the time of turning blue is predetermined times 60 – 90 minutes of turning blue;
The 4th step: the part part of growing up goes out groove: after 85 minutes, the processing of turning blue finishes, the part part of will growing up takes out from the groove that turns blue, take-off speed is 40mm/ second, simultaneously, with 12 fixedly head wash piece surface simultaneously, keep the wetting in case alkaline liquid drying of turning blue of workpiece surface on the face of turning blue, the flushing angle of head is 45 degree, the surface range of head flushing part is no more than 500 * 500mm, after part goes out groove fully, again part is changed in the Rinsing Area and its lip-deep alkalescence liquid that turns blue is cleaned up;
The 5th step: subsequent disposal: the part part of growing up after will cleaning up earlier is shelved on the sleeper that is lined with infantees in case the film that turns blue of damaging is tested to the part part of growing up then, and this check comprises turn blue film inspection and protective capacities inspection;
The film inspection of turning blue: the part after turning blue does not exist does not locally have the situation of film of turning blue, and does not have white or green dust on the film that turns blue, passed examination;
Protective capacities is checked: drip 2 of 1 – on the part after turning blue with in the cupric oxide and 3% the copper sulfate CuSO that crosses
45H
2O solution, 30 second post-flush clean, find to occur on the test surfaces pink, passed examination;
On the part part of growing up, coat slushing oil after the assay was approved.
Claims (9)
1. the high temperature of the part part of the growing up method of turning blue is characterized in that this method may further comprise the steps successively:
The first step: place upholder: place upholder in the bottom of the groove that turns blue earlier, this upholder is the low structure of the high end of an end, the inclination angle of its low side, the line between high-end and the trench bottom that turns blue is more than or equal to 10 degree, low side and the spacing distance of trench bottom of turning blue be more than or equal to 10cm, and be circular arc with the contacted contact surface of part part of growing up on the upholder;
Second step: the preparation liquid that turns blue: the starting material of the part part of growing up that turns blue as required earlier determine that the predetermined temperature of turning blue turns blue the time with predetermined, in the groove that turns blue, prepare the liquid that turns blue then, concentration sodium hydroxide is 600 – 700g/l in this liquid that turns blue, the concentration of Sodium Nitrite is 150 – 200g/l, some odd parts is put into the liquid slaking so that this turns blue of turning blue repeatedly of this liquid that turns blue after the preparation again;
The 3rd step: high temperature turns blue: the part part oil removing of growing up that needs are turned blue earlier, rust cleaning clean up, then the clean part part of growing up is put into hot water and carry out preheating, the temperature of hot water is 100 ℃ of 80 –, be 5 – 15 minutes warm up time, again the part part of growing up after the preheating is shelved on the upholder in the groove that turns blue, the turn blue temperature of liquid of the groove that turns blue when putting into is the maximum of the predetermined temperature of turning blue of this part part of growing up, the processing of turning blue then, and the time of turning blue turns blue the time for predetermined;
The 4th step: the part part of growing up goes out groove: after the processing of turning blue finishes, the part part of will growing up takes out from the groove that turns blue, take-off speed should be less than 50mm/ second, simultaneously, wash piece surface simultaneously with at least three heads, keep the wetting in case alkaline liquid drying of turning blue of workpiece surface on the face of turning blue, the flushing angle of head is 20 Du –, 90 degree, if head is fixing head, then its flushing piece surface scope is no more than 500 * 500mm, and for can swing head, then its flushing piece surface scope is no more than 2000mm * 500mm as if head, after part goes out groove fully, again part is changed in the Rinsing Area and its lip-deep alkalescence liquid that turns blue is cleaned up;
The 5th step: subsequent disposal: the part part of growing up that will clean up earlier is shelved on the sleeper that is lined with infantees in case the film that turns blue of damaging is tested oiling after the assay was approved then to the part part of growing up;
Described check comprises turn blue film inspection and protective capacities inspection, and the film inspection of turning blue is meant that the part after turning blue does not allow the part not have adularescent or green dust on turn blue film or the film, but can allow the slight red dust of wiping; Described protective capacities inspection is meant drips 2 of 1 – with in the cupric oxide and 3% the copper sulfate CuSO that crosses on the part after turning blue
45H
2O solution, 30 second post-flush clean, it is then qualified pink not occur as test surfaces.
2. described a kind of high temperature of growing up the part part according to claim 1 method of turning blue, it is characterized in that: the manufactured materials of above support is an iron.
3. described a kind of high temperature of growing up the part part according to claim 1 method of turning blue is characterized in that: described the first step low and middle-end, the line between high-end are 20 degree with the inclination angle of the trench bottom that turns blue.
4. described a kind of high temperature of growing up the part part according to claim 1 method of turning blue is characterized in that: the starting material of the described part part of growing up that turns blue as required determine that the predetermined temperature of turning blue was meant with the predetermined time of turning blue:
When starting material were cast iron, the predetermined temperature of turning blue of the part part of growing up was 138 ℃ of 135 –, and the predetermined time of turning blue is 90 – 120 minutes;
When starting material when being carbon content greater than 0.7% carbon steel, the predetermined temperature of turning blue of the part part of growing up is 140 ℃ of 138 –, and the predetermined time of turning blue is 60 – 90 minutes;
When starting material were the carbon steel of carbon content 0.4% – 0.7%, the predetermined temperature of turning blue of the part part of growing up was 142 ℃ of 138 –, and the predetermined time of turning blue is 60 – 90 minutes;
When starting material when being carbon content less than 0.4% carbon steel, the predetermined temperature of turning blue of the part part of growing up is 145 ℃ of 140 –, and the predetermined time of turning blue is 60 – 90 minutes;
When starting material were steel alloy, the predetermined temperature of turning blue of the part part of growing up was 145 ℃ of 140 –, and the predetermined time of turning blue is 60 – 90 minutes;
When starting material were rapid steel, the predetermined temperature of turning blue of the part part of growing up was 138 ℃ of 135 –, and the predetermined time of turning blue is that classification is turned blue, each 30 minutes.
5. described a kind of high temperature of growing up the part part according to claim 1 method of turning blue is characterized in that: the temperature of hot water is 90 ℃ in described the 3rd step, and be 10 minutes warm up time.
6. described a kind of high temperature of growing up the part part according to claim 1 method of turning blue is characterized in that: the temperature fluctuation of the liquid that turns blue in the process that described the 3rd step high temperature turns blue is smaller or equal to 5 ℃.
7. described a kind of high temperature of growing up the part part according to claim 1 method of turning blue, it is characterized in that: the described second step preparation is turned blue during liquid or the 3rd step high temperature turns blue, on the low side and influence is when turning blue temperature when alkali concn in the liquid that turns blue, should add sodium hydroxide with the turn blue temperature of liquid of raising, the addition of sodium hydroxide is decided by the temperature that needs improve, and adds 10 gram sodium hydroxide in every liter of solution and can improve 1 ℃ of solution temperature.
8. described a kind of high temperature of growing up the part part according to claim 1 method of turning blue is characterized in that: the quantity of head is 12 in described the 4th step.
9. according to claim 1 or 8 described described a kind of high temperature of growing up the part part method of turning blue, it is characterized in that: the flushing angle of described head is 45 degree.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102741772A CN101922005B (en) | 2010-09-07 | 2010-09-07 | High-temperature bluing method of long and large part |
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| CN2010102741772A CN101922005B (en) | 2010-09-07 | 2010-09-07 | High-temperature bluing method of long and large part |
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| CN101922005B CN101922005B (en) | 2012-02-29 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102634788A (en) * | 2012-04-09 | 2012-08-15 | 武汉船用机械有限责任公司 | Method for blueing surface of long pipe accessory |
| CN103993305A (en) * | 2014-06-03 | 2014-08-20 | 莱芜钢铁集团有限公司 | Roller surface treatment device and process |
| CN110306179A (en) * | 2019-07-10 | 2019-10-08 | 湖南三泰新材料股份有限公司 | A kind of online acidity of hot-rolled reinforced bar is given a protective coating to metal objects method |
| TWI695073B (en) * | 2019-03-19 | 2020-06-01 | 輯興熱處理工業股份有限公司 | Temperature colorizing process |
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| CN1069295A (en) * | 1991-08-02 | 1993-02-24 | 长沙市南区金属表面处理材料厂 | Metal normal temperature blackening without the energy |
| CN101029389A (en) * | 2007-04-12 | 2007-09-05 | 北京中科三环高技术股份有限公司 | Surface protection of neodymium iron boron permanent-magnet material |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1069295A (en) * | 1991-08-02 | 1993-02-24 | 长沙市南区金属表面处理材料厂 | Metal normal temperature blackening without the energy |
| CN101029389A (en) * | 2007-04-12 | 2007-09-05 | 北京中科三环高技术股份有限公司 | Surface protection of neodymium iron boron permanent-magnet material |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102634788A (en) * | 2012-04-09 | 2012-08-15 | 武汉船用机械有限责任公司 | Method for blueing surface of long pipe accessory |
| CN102634788B (en) * | 2012-04-09 | 2014-12-24 | 武汉船用机械有限责任公司 | Method for blueing surface of long pipe accessory |
| CN103993305A (en) * | 2014-06-03 | 2014-08-20 | 莱芜钢铁集团有限公司 | Roller surface treatment device and process |
| CN103993305B (en) * | 2014-06-03 | 2017-06-13 | 莱芜钢铁集团有限公司 | Roller surface processing unit and technique |
| TWI695073B (en) * | 2019-03-19 | 2020-06-01 | 輯興熱處理工業股份有限公司 | Temperature colorizing process |
| CN110306179A (en) * | 2019-07-10 | 2019-10-08 | 湖南三泰新材料股份有限公司 | A kind of online acidity of hot-rolled reinforced bar is given a protective coating to metal objects method |
| CN110306179B (en) * | 2019-07-10 | 2021-05-18 | 湖南三泰新材料股份有限公司 | Online acid bluing method for hot-rolled steel bars |
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|---|---|
| CN101922005B (en) | 2012-02-29 |
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