CN103305772A - High-hardness slurry pump body and manufacturing method thereof - Google Patents
High-hardness slurry pump body and manufacturing method thereof Download PDFInfo
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- CN103305772A CN103305772A CN2013101932738A CN201310193273A CN103305772A CN 103305772 A CN103305772 A CN 103305772A CN 2013101932738 A CN2013101932738 A CN 2013101932738A CN 201310193273 A CN201310193273 A CN 201310193273A CN 103305772 A CN103305772 A CN 103305772A
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Abstract
The invention discloses a high-hardness slurry pump body and a manufacturing method thereof, and solves the problems that the hardness of the slurry pump body in the prior art is low and the like. The slurry pump body consists of the following components in percentage by mass: 2.8-3.3% of carbon, 26-28% of chromium, 0.30-0.8% of silicon, 0.5-1.0% of manganese, 0.7-1.2% of nickel, 0.15-0.6% of molybdenum, 0.025-0.050% of zirconium, less than or equal to 0.50% of copper, less than or equal to 0.020% of niobium and the balance of iron and inevitable impurities. The invention also provides the manufacturing method of the slurry pump body. The manufacturing method comprises the following steps of matching, casting, cutting casting heads and carrying out heat treating. According to the high-hardness slurry pump body and the manufacturing method thereof, the structure of the slurry pump body is improved, so that the slurry pump body is high in hardness, good in mechanical property and long in service life.
Description
Technical field
The present invention relates to a kind of slag stock pump pump housing, be specifically related to a kind of high rigidity slag stock pump pump housing and preparation method thereof, belong to metal material field.
Background technology
The slag stock pump is a kind of impeller pump that is used for carrying and handling two-phase or multiphase material of solid-liquid, is widely used in industries such as mine, coloured, metallurgical smelting, coal, oil and chemical industry.The slag stock pump pump housing in use in course of conveying the slag stock pump is produced the wearing and tearing of washing away because of the fluid that contains solid particulate and the fluid medium that transports has acid-basicity in various degree corrosive nature to be arranged to the slag stock pump, thereby has shortened the life cycle of the slag stock pump pump housing.So the slag stock pump pump housing is in use except having higher requirement to wear-resisting-gasproof erosion-corrosion resistance nature, also needing has higher hardness.
Chinese patent application file (publication number: CN102560232A) disclose a kind of hypoeutectic rich chromium cast iron and heat-treatment processing process for slag stock pump blade, the chemical ingredients of this cast iron is by weight percentage: C:2.6～2.8%, Cr:26～32%, Si:0.5～0.7%, Mn:0.3～0.6%, Ni:0.2～0.4%, Mo:0.1～0.2%, Cu:0.02～0.04%, it adopts cast iron is carried out melting in electric furnace, composite inoculating is handled, Shot Blasting, stress relief annealing, mechanical workout, the thermal treatment process of quenching+tempering process, though improved impelling strength and the wear resistance of impeller, its hardness does not still reach the required hardness of the pump housing.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of preparation method of the high rigidity slag stock pump pump housing and this high rigidity slag stock pump pump housing of good mechanical property is provided.
Purpose of the present invention can realize by following technical proposal: a kind of high rigidity slag stock pump pump housing, its component and mass percent are: carbon (C): 2.8%-3.3%, chromium (Cr): 26%-28%, silicon (Si): 0.30%-0.8%, manganese (Mn): 0.5%-1.0%, nickel (Ni): 0.7%-1.2%, molybdenum (Mo): 0.15%-0.6%, zirconium (Zr): 0.025%-0.050%, copper (Cu)≤0.50%, niobium (Nb)≤0.020%, surplus are iron (Fe) and unavoidable impurities; The mechanical property of the described high rigidity slag stock pump pump housing is as follows: Rockwell hardness 〉=60HB.
Compared to prior art, the slag stock pump pump housing among the present invention has been introduced zirconium, niobium element, by the synergy of zr element and other each elements, can obtain the high rigidity slag stock pump pump housing.
In the described impurity, the mass percent of sulphur (S) is smaller or equal to 0.019%, and the mass percent of phosphorus (P) is smaller or equal to 0.019%.
Carbon content is 2.8%-3.3% in the high rigidity slag stock pump pump housing of the present invention.In the slag stock pump pump housing carbon can with iron, chromium form stable (Cr, Fe)
7C
3The type carbide also can form carbide with Fe, Mn, and improve the hardness of the slag stock pump pump housing by quenching, and can guarantee enough plasticity, toughness and other mechanical propertys simultaneously again.Carbon among the present invention can produce synergy with other elements, makes the slag stock pump pump housing have better comprehensive performance, especially has higher hardness.
Chromium content in the slag stock pump pump housing of the present invention is 26%-28%.The radius of chromium atom is 2.8.10
-10M, and the iron atom radius is 2.710
-10M, both are very close, chromium is stronger than other elements with the avidity of iron, be combined with carbon, iron easily formation (Cr, Fe)
3C and a small amount of (FeCr)
7C
3Dissolve in the sosoloid, can strengthen matrix, improve the hardening capacity of the slag stock pump pump housing.If Cr content is low excessively, the erosion resistance of the slag stock pump pump housing is not good.The present invention brings up to 26%-28% with the mass percent of chromium element, can make chromium and other elements produce synergy, thereby make the slag stock pump pump housing among the application have better comprehensive performance, especially has higher hardness.
Element silicon is dissolved in the ferrite, can strongly inhibited decompose with the carbide of alleviating supercooled austenite, improves stabilization of austenite.Its content cooperates with manganese element content, can effectively improve the toughness of the slag stock pump pump housing, improves intensity and the hardness of the slag stock pump pump housing.Silicon also can change the carbide pattern in the slag stock pump pump housing, when silicone content was low, as w (Si)=0.3%, carbide often was the faller gill shape, but when the massfraction of silicon increased to 0.8%, it is block that carbide then is.Therefore this slag stock pump pump housing is strict controlled in 0.30-0.80% with the mass percent of silicon, makes the slag stock pump pump housing among the present invention have better comprehensive performance.Even if larger-size massive carbide very easily occurs otherwise the resistance of oxidation of the slag stock pump pump housing in use increases, thus the mechanical property of the infringement slag stock pump pump housing.
Manganese is main strengthening element in the slag stock pump pump housing, mainly plays effects such as deoxidation degasification and raising hardening capacity in the slag stock pump pump housing.Manganese can generate (FeMn) with iron in the slag stock pump pump housing
3C type carbide reduces the austenite decomposition rate, thereby improves the hardening capacity of the slag stock pump pump housing greatly.If its content of deoxidation must be more than 0.5% in the slag stock pump pump housing for manganese, but the manganese too high levels, thereby manganese is dissolved in and can reduces martensite transformation temperature in the austenite and then make the Ovshinsky scale of construction remaining in the quenching structure increase the wear resistance that influences the slag stock pump pump housing.Under the prerequisite that guarantees austenite structure, the reduction of manganese content can cause stabilization of austenite slightly to descend, but the workhardness of the slag stock pump pump housing can significantly strengthen.But in the slag stock pump pump housing, add also refinement material structure of manganese element, improve recrystallization temperature, thereby the thermotolerance when strengthening the slag stock pump pump housing and in use producing high temperature because of friction.Therefore the present invention at 0.5%-1.0%, had both guaranteed austenite structure with the control of manganese content, had increased austenitic hardness and intensity again.
Nickel can reduce the austenite decomposition rate in the slag stock pump pump housing, improve the hardening capacity of the slag stock pump pump housing greatly, also can increase substantially intensity and the toughness of the slag stock pump pump housing.Element actings in conjunction such as nickel and chromium, molybdenum can obviously improve the hardness of the slag stock pump pump housing.But nickel is more rare resource, should reduce its content under the prerequisite that guarantees slag stock pump pump housing performance, so the nickel content in the slag stock pump pump housing of the present invention is 0.7%-1.2% as far as possible.
The molybdenum element of crystal grain thinning is added in this slag stock pump pump housing, can play three aspect effects: one, molybdenum can suppress the cementite gathering effectively, cause the carbide of molybdenum to be distributed in the austenite with superfine small size disperse, but while dispersion-strengthened action, strengthen austenite structure, intensity and the hardness of the slag stock pump pump housing are increased, and the strain-hardening performance strengthens.Two, molybdenum is distributed in and can effectively suppresses separating out of grain boundary carbide in the slag stock pump pump housing process of cooling in the carbide, chromatize can make grain boundary carbide separate out tendency to improve greatly in the slag stock pump pump housing, and the compound interpolation of molybdenum and two kinds of elements of chromium can make the beneficial effect of two kinds of alloying elements bring into play simultaneously.Three, add molybdenum in the slag stock pump pump housing after, acicular carbide shortens, quantity obviously reduces, and separates out temperature and improves, and the embrittlement temperature of the slag stock pump pump housing is brought up to about 350 ℃.During as can be known when about 0.5% molybdenum of adding, can reduce or restrain the temper brittleness that other alloying elements cause through experiment.Under higher tempering temperature, form the alloy carbide that fills the air distribution, the secondary hardening effect is arranged.Cooperate with manganese in the adding slag stock pump pump housing and more can bring into play the effect in the slag stock pump pump housing of molybdenum and manganese effectively, mechanical propertys such as the hardness of the raising slag stock pump pump housing, hardening capacity.
The present invention adds mass percent in the slag stock pump pump housing be the zirconium of 0.025-0.050%.The present invention obtains described zr element by the mode of adding zirconium silicide, and described zirconium silicide is ZrSi, ZrSi
2, ZrSi
3In a kind of.The zirconium that adds can make slag stock pump pump housing dense internal organization, and refine austenite crystal grain is strong deoxidation in the slag stock pump pump housing, denitrogenate, the desulfuration element.Zirconium can not only form zirconium carbide with carbon, also can be combined with sulphur to form sulfide, thereby reduce the red brittleness of the slag stock pump pump housing, reduces the strain aging phenomenon, improves the low-temperature flexibility of the slag stock pump pump housing.In the slag stock pump pump housing, add millesimal zirconium, just can improve hardness and the intensity of the slag stock pump pump housing greatly.In this slag stock pump pump housing the mass percent of zr element is controlled at 0.025-0.050%, can be made zirconium and other elements produce synergy, make the slag stock pump pump housing among the present invention have better comprehensive performance.
Add copper in the slag stock pump pump housing of the present invention, make the slag stock pump pump housing namely have higher intensity, toughness and hardening capacity.Unite adding with molybdenum in the present invention, make to produce synergy, when improving hardening capacity, can further change carbide morphology and distribution again, and obtain acicular structure when promoting air quenching.But if the copper add-on surpasses 0.5%, then can generate copper-rich phase and tiny crack, therefore the plasticity of the slag stock pump pump housing can reduce.For stable austenite so the present invention with the content control of copper below 0.50%.
In the slag stock pump pump housing of the present invention because niobium have an obvious refinement of as-cast structure, the disperse NbC particle of regular shape that distributing on austenitic matrix, granularity is below 10 μ m.The slag stock pump pump housing is under arms the time, and the austenite back that is hit produces slip line, and these slip lines must be walked around the niobium particle, thereby hinder slippage and viscous deformation, improve the slag stock pump pump housing strength property, particularly yield strength and improve nearly 1 times.Trace niobium not only can improve the intensity of the slag stock pump pump housing under the situation of the plasticity that does not influence the slag stock pump pump housing or toughness, also can increase the temper resistance of the slag stock pump pump housing, and the secondary hardening effect is arranged.But if the amount that niobium adds is too much, the thick niobium compound that contains can occur, reduce the obdurability of the slag stock pump pump housing on the contrary.
In the slag stock pump pump housing of the present invention with sulphur control 0.025% with interior in order to reduce the red brittleness of the slag stock pump pump housing, improve ductility and the hardness of the slag stock pump pump housing.
P and s is similar, and wear resistance and the mechanical property of the slag stock pump pump housing all had special injurious effects.The present invention controls the content of phosphorus in 0.025%, and in order to the plasticity, toughness, the wear resistance that improve the slag stock pump pump housing, per 0.02% P on average reduces impelling strength 1.98J/cm
2, dropping to 0.02%-0.04% but work as phosphorus from 0.07%-1.0%, the plasticity of the slag stock pump pump housing, toughness, hardness all can improve 40%-50%, and casting crack also can significantly reduce, and also can avoid separating out the eutectic phosphide along crystal boundary.
Further, component and the mass percent of the described high rigidity slag stock pump pump housing are: carbon (C): 2.68%, manganese (Mn): 1.012%, silicon (Si): 0.608%, chromium (Cr:23.65%, nickel (Ni): 0.267%, molybdenum (Mo): 0.164%, zirconium (Zr): 0.028%, copper (Cu)≤0.50%, niobium (Nb)≤0.020%, surplus are iron (Fe) and unavoidable impurities; The mechanical property of the described high rigidity slag stock pump pump housing is as follows: Rockwell hardness 〉=60HB, and in the wherein said impurity, the mass percent of sulphur (S) is smaller or equal to 0.019%, and the mass percent of phosphorus (P) is smaller or equal to 0.019%.
The present invention also provides a kind of preparation method of as the above-mentioned high rigidity slag stock pump pump housing, and described preparation method may further comprise the steps:
S1, preparation of raw material: according to component and the mass percent preparation raw material of the described high rigidity slag stock pump pump housing.
S2, casting: with the above-mentioned raw material for preparing smelt, casting, obtain the moulding slag stock pump pump housing.
The cutting of S3, dead head: with above-mentioned moulding slag stock pump pump housing preheating after heat cut, heat digs.
S4, thermal treatment: the moulding slag stock pump pump housing behind the above-mentioned heat plane is carried out surface finish handle, carry out normalizing when being warming up to 950-1000 ℃ then, treat to quench when temperature is 890-920 ℃, insulation after quenching, the air cooling of coming out of the stove then, be tempering under 220-250 ℃ the condition in temperature, be incubated after the tempering, namely obtain the finished product high rigidity slag stock pump pump housing.
Thermal treatment is to improve and the important procedure that improves the steel casting mechanical property.Before thermal treatment, there is big internal stress in the slag stock pump pump housing, is easy to generate crackle during gas cutting, for avoiding crackle, needs to adopt rising head heat to cut.Can not the undercutting foundry goods when noting oxygen machining when heat is cut, the rising head root is with the planing of carbon arc gas rod.Arcgouging utilizes the electrode that produces up to 6000-7000 ℃ between carbon dioxide process carbon electrode and the foundry goods to come the deposite metal, by pressurized air molten metal bath is blown down, and removes the foundry goods dead head with Dutch.The quenching temperature that the present invention adopts is different from the quenching temperature of conventional hypoeutectoid steel, set quenching temperature routinely and be up to 900 ℃, but quenching effect is unsatisfactory.Steel is in heat-processed, and in the time of 400-700 ℃, carbide is constantly separated out and grown up, and carbide dissolves gradually in the time of 700-900 ℃, when being heated to more than 900 ℃, even remaining carbide also can all dissolve on the crystal boundary.Because the existence of the carbide of indissoluble is necessary to improve its solid solubility temperature, and quenching temperature is brought up to 890-920 ℃, the slag stock pump pump housing can reach best toughness and plasticity.Improve the homogenizing that the temperature of quenching is conducive to composition, further reduce the high-carbon microcell, increase the quantity of the strong martensite of high dislocation lath and film like residual austenite, thereby improve the obdurability of the slag stock pump pump housing, strengthen the ability of opposing crack propagation, alleviate stress concentration, improve toughness.
In the preparation method of the above-mentioned high rigidity slag stock pump pump housing, as preferably, in step S1, obtain described zr element by the mode of adding zirconium silicide, said zirconium silicide is ZrSi, ZrSi
2, ZrSi
3In a kind of.
In the preparation method of the above-mentioned high rigidity slag stock pump pump housing, as preferably, in step S2, the temperature during described moulding slag stock pump pump housing cast molding is 1550-1570 ℃.
Teeming temperature is huge to the grain fineness number influence of steel, and cast cold can obtain fine crystalline structure, also can improve toughness.But cross the consecutive solidification mode that low teeming temperature has been upset foundry goods, can occur solidifying simultaneously, the gas that is involved in when making cast and impurity can not get discharging, and slag stock pump pump housing foundry goods can not get due feeding, produces serious shrinkage porosite, even internal fissure occurs.
In the preparation method of the above-mentioned high rigidity slag stock pump pump housing, as preferably, in step S3, the preheating temperature during described moulding slag stock pump pump housing preheating is 350-480 ℃, and be 3-5 hour warm up time.
In the preparation method of the above-mentioned high rigidity slag stock pump pump housing, as preferably, in step S4, described normalizing temperature is 960-990 ℃, and the normalizing soaking time is 2-4 hour.Described quenching temperature is 910-950 ℃, and Quenching Soaking Time is 2-4 hour; Described tempering temperature is 200-220 ℃, and tempering insulation time is 2-4 hour.
If Heating temperature is on the low side or soaking time is not enough in the thermal treatment, carbide can not fully dissolve, and frequent is on austenitic crystal boundary, and if Heating temperature is higher in the thermal treatment, austenite crystal then can be grown up.
The present invention also aims to by the improvement to slag stock pump body construction, improve its hardness, prolong its work-ing life, the described slag stock pump pump housing comprises the body with outlet, be provided with boss in inner body wall near export department, boss one side and body outlet inner side-wall are in the same plane, and boss another side arc transition is to inner body wall.By in the pump housing exit boss being set, under the rotation that does not influence impeller in the pump housing, improved the hardness of slag stock pump.
In above-mentioned slag stock pump, described boss and body are connected as a single entity.
In above-mentioned slag stock pump, described boss thickness is identical with body thickness.
In above-mentioned slag stock pump, described boss radius-of-curvature is 80mm.
Compared with prior art, the present invention has added the raw material of zirconium, niobium element and extra fine quality per-cent especially by the configuration specific components, and by special preparation method, simultaneously slag stock pump main body structure is improved, and obtains the slag stock pump pump housing of the present invention.The good mechanical property of this slag stock pump pump housing especially has higher hardness, longer service life.
Description of drawings
Fig. 1 is the structural representation of this slag stock pump.
Among the figure, 1, body; 2, outlet; 3, boss.
Embodiment
Below be specific embodiments of the invention, technical scheme of the present invention is further described, but the present invention is not limited to these embodiment.
Table 1: embodiment 1-3 is for the preparation of component and the mass percent of the high rigidity slag stock pump pump housing
Embodiment 1
Press composition and the mass percent thereof of table 1 embodiment 1 definite high rigidity slag stock pump pump housing, the composition of the high rigidity slag stock pump pump housing and mass percent thereof have certain influence to the mechanical property of the slag stock pump pump housing, and its preparation technology also has bigger influence to the mechanical property of the high rigidity slag stock pump pump housing of final formation.
Prepare the high rigidity slag stock pump pump housing by the following method:
Preparation of raw material: according to component and the mass percent preparation raw material of pressing the embodiment 1 described high rigidity slag stock pump pump housing in the table 1.
Casting: the above-mentioned raw material for preparing is smelted, is casting under 1550 ℃ the condition in temperature, obtain the moulding slag stock pump pump housing.
Dead head cutting: be preheating 3 hours under 360 ℃ the condition in temperature with the above-mentioned moulding slag stock pump pump housing, heat is cut then, heat digs.
Thermal treatment: the moulding slag stock pump pump housing behind the above-mentioned heat plane is carried out surface finish handle, carry out normalizing when being warming up to 960 ℃ then, insulation is 2 hours after the normalizing.Treat to quench when temperature is 900 ℃ the back insulation 3 hours of quenching, the air cooling of coming out of the stove then.Be tempering under 220 ℃ the condition in temperature, insulation is 2 hours after the tempering, namely obtains the finished product high rigidity slag stock pump pump housing.
Prepare the high rigidity slag stock pump pump housing by the following method:
Preparation of raw material: according to component and the mass percent preparation raw material of pressing the embodiment 2 described high rigidity slag stock pump pump housings in the table 1.
Casting: the above-mentioned raw material for preparing is smelted, is casting under 1560 ℃ the condition in temperature, get the moulding slag stock pump pump housing.
Dead head cutting: be preheating 4 hours under 420 ℃ the condition in temperature with the above-mentioned moulding slag stock pump pump housing, heat is cut then, heat digs.
Thermal treatment: the moulding slag stock pump pump housing behind the above-mentioned heat plane is carried out surface finish handle, carry out normalizing when being warming up to 980 ℃ then, insulation is 3 hours after the normalizing.Treat to quench when temperature is 910 ℃ the back insulation 2 hours of quenching, the air cooling of coming out of the stove then.Be tempering under 230 ℃ the condition in temperature, insulation is 3 hours after the tempering, namely obtains the finished product high rigidity slag stock pump pump housing.
Prepare the high rigidity slag stock pump pump housing by the following method:
Preparation of raw material: according to component and the mass percent preparation raw material of pressing the embodiment 3 described high rigidity slag stock pump pump housings in the table 1.
Casting: the above-mentioned raw material for preparing is smelted, is casting under 1570 ℃ the condition in temperature, get the moulding slag stock pump pump housing.
Dead head cutting: be preheating 4 hours under 480 ℃ the condition in temperature with the above-mentioned moulding slag stock pump pump housing, heat is cut then, heat digs.
Thermal treatment: the moulding slag stock pump pump housing behind the above-mentioned heat plane is carried out surface finish handle, carry out normalizing when being warming up to 990 ℃ then, insulation is 4 hours after the normalizing.Treat to quench when temperature is 920 ℃ the back insulation 3 hours of quenching, the air cooling of coming out of the stove then.Be tempering under 250 ℃ the condition in temperature, insulation is 4 hours after the tempering, namely obtains the finished product high rigidity slag stock pump pump housing.
Extract the high rigidity slag stock pump pump housing for preparing among the embodiment of the invention 1-3 immediately and carry out measuring mechanical property, the result is as shown in table 2.
Table 2: the measuring mechanical property result of the high rigidity slag stock pump pump housing
The slag stock pump pump housing among the present invention has the favorable mechanical performance as can be drawn from Table 2, the hardness height of the slag stock pump pump housing especially, long service life.
As shown in Figure 1, the slag stock pump pump housing comprises the body 1 with outlet 2, be provided with boss 3 at body 1 inwall near outlet 2 places, boss 3 one sides and body 1 outlet 2 inner side-walls are in the same plane, boss 3 another side arc transition are to the pump housing 2 inwalls, boss 3 be connected as a single entity with body 1 and boss 3 thickness identical with the pump housing 1 thickness, boss 3 radius-of-curvature are 80mm.Because original slag stock pump pump housing exit sidewall is thinner, in use wearing and tearing are the most serious, the replacing of the overwhelming majority pump housing all is can't use because of the exit wearing and tearing, by in the pump housing 1 exit boss 3 being set, in not influencing the pump housing 1, under the rotation of impeller, improved the hardness of slag stock pump.
Specific embodiment described herein only is that the present invention's spirit is illustrated.Those skilled in the art can make various modifications or replenish or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (10)
1. high rigidity slag stock pump pump housing, it is characterized in that component and the mass percent of the described high rigidity slag stock pump pump housing are: carbon (C): 2.8%-3.3%, chromium (Cr): 26%-28%, silicon (Si): 0.30%-0.8%, manganese (Mn): 0.5%-1.0%, nickel (Ni): 0.7%-1.2%, molybdenum (Mo): 0.15%-0.6%, zirconium (Zr): 0.025%-0.050%, copper (Cu)≤0.50%, niobium (Nb)≤0.020%, surplus is iron (Fe) and unavoidable impurities; The mechanical property of the described high rigidity slag stock pump pump housing is as follows: Rockwell hardness 〉=60HB.
2. the high rigidity slag stock pump pump housing according to claim 1 is characterized in that, in the described impurity, the mass percent of sulphur (S) is smaller or equal to 0.040%, and the mass percent of phosphorus (P) is smaller or equal to 0.040%.
3. the high rigidity slag stock pump pump housing according to claim 2, it is characterized in that component and the mass percent of the described high rigidity slag stock pump pump housing are: carbon (C): 2.68%, chromium (Cr): 23.65%, silicon (Si): 0.608%, manganese (Mn): 1.012%, nickel (Ni): 0.267%, molybdenum (Mo): 0.164%, zirconium (Zr): 0.028%, copper (Cu)≤0.50%, niobium (Nb)≤0.020%, surplus is iron (Fe) and unavoidable impurities; The mechanical property of the described high rigidity slag stock pump pump housing is as follows: Rockwell hardness 〉=60HB, and in the wherein said impurity, the mass percent of sulphur (S) is smaller or equal to 0.019%, and the mass percent of phosphorus (P) is smaller or equal to 0.019%.
4. the preparation method of a high rigidity slag stock pump pump housing as claimed in claim 1 is characterized in that described preparation method may further comprise the steps:
S1, preparation of raw material: according to component and the mass percent preparation raw material of the described high rigidity slag stock pump pump housing;
S2, casting: with the above-mentioned raw material for preparing smelt, casting, obtain the moulding slag stock pump pump housing;
The cutting of S3, dead head: with above-mentioned moulding slag stock pump pump housing preheating after heat cut, heat digs;
S4, thermal treatment: the moulding slag stock pump pump housing behind the above-mentioned heat plane is carried out surface finish handle, carry out normalizing when being warming up to 950-1000 ℃ then, treat to quench when temperature is 890-920 ℃, insulation after quenching, the air cooling of coming out of the stove then, be tempering under 220-250 ℃ the condition in temperature, be incubated after the tempering, namely obtain the finished product high rigidity slag stock pump pump housing.
5. the preparation method of the high rigidity slag stock pump pump housing according to claim 4 is characterized in that, in step S1, obtains described zr element by the mode of adding zirconium silicide; In step S2, the temperature during described moulding slag stock pump pump housing cast molding is 1550-1570 ℃; In step S3, the preheating temperature during described moulding slag stock pump pump housing preheating is 350-480 ℃, and be 3-5 hour warm up time.
6. the preparation method of the high rigidity slag stock pump pump housing according to claim 4 is characterized in that, in step S4, described normalizing temperature is 970-990 ℃, and the normalizing soaking time is 2-4 hour; Described quenching temperature is 900-920 ℃, and Quenching Soaking Time is 2-4 hour; Described tempering temperature is 230-250 ℃, and tempering insulation time is 2-4 hour.
7. slag stock pump pump housing of making as preparation method as described in the claim 4, comprise the body with outlet, be provided with boss in inner body wall near export department, boss one side and body outlet inner side-wall are in the same plane, and boss another side arc transition is to inner body wall.
8. slag stock pump according to claim 7 is characterized in that, described boss and body are connected as a single entity.
9. slag stock pump according to claim 8 is characterized in that, described boss thickness is identical with body thickness.
10. slag stock pump according to claim 9 is characterized in that, described boss radius-of-curvature is 80mm.
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| CN107365901A (en) * | 2017-06-06 | 2017-11-21 | 安徽腾龙泵阀制造有限公司 | A kind of processing method for improving chemical pump pump case case hardness |
| CN109082513A (en) * | 2018-09-12 | 2018-12-25 | 新乡市长城铸钢有限公司 | A kind of heat treatment process of large size pump case |
| CN111850380A (en) * | 2020-07-29 | 2020-10-30 | 南平市建阳区湛卢精密制造有限公司 | Low-temperature carbon steel valve casting material and manufacturing process thereof |
| CN112045170A (en) * | 2020-08-26 | 2020-12-08 | 共享铸钢有限公司 | Method for preventing large steel casting from cracking |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105536934A (en) * | 2016-01-27 | 2016-05-04 | 建始县楚瑜精密铸造有限责任公司 | Grinding structure used for Raymond mill and casting method of grinding structure |
| CN107365901A (en) * | 2017-06-06 | 2017-11-21 | 安徽腾龙泵阀制造有限公司 | A kind of processing method for improving chemical pump pump case case hardness |
| CN109082513A (en) * | 2018-09-12 | 2018-12-25 | 新乡市长城铸钢有限公司 | A kind of heat treatment process of large size pump case |
| CN111850380A (en) * | 2020-07-29 | 2020-10-30 | 南平市建阳区湛卢精密制造有限公司 | Low-temperature carbon steel valve casting material and manufacturing process thereof |
| CN111850380B (en) * | 2020-07-29 | 2021-08-10 | 南平市建阳区湛卢精密制造有限公司 | Low-temperature carbon steel valve casting material and manufacturing process thereof |
| CN112045170A (en) * | 2020-08-26 | 2020-12-08 | 共享铸钢有限公司 | Method for preventing large steel casting from cracking |
| CN112045170B (en) * | 2020-08-26 | 2022-02-22 | 共享铸钢有限公司 | Method for preventing large steel casting from cracking |
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| CN103305772B (en) | 2016-05-25 |
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