CN102115850B - Multi-component low-alloyed large-scale wear-resistant cast steel hammerhead and preparation process thereof - Google Patents
Multi-component low-alloyed large-scale wear-resistant cast steel hammerhead and preparation process thereof Download PDFInfo
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Abstract
The invention discloses a multi-component low-alloyed large-scale wear-resistant cast steel hammerhead, and the hammerhead comprises the following chemical components on a weight basis: 0.30-0.50% of C, 0.3-1.2% of Si, 0.5-1.5% of Mn, 1.5-3.5% of Cr, 0.3-1.5% of Ni, 0.3-1.5% of Mo, 0.05-0.30% of V, <0.05% of S, <0.05% of P, and the balance of Fe. Meanwhile, the invention also discloses the preparation process of the hammerhead; the wear-resistant hammerhead disclosed by the invention both has an attacking part with high hardness and certain toughness so as to meet the wear resistance requirement for the hammerhead, and has an installing part with high toughness and certain hardness so as to ensure the use safety of the hammerhead.
Description
Technical field
The present invention relates to a kind of cast steel tup; Relate in particular to a kind of large-scale wearable cast steel tup of multi-element low alloyization of graded performance; The invention also discloses a kind of preparation technology who produces this kind tup simultaneously, belong to the production technical field that is used for the wear-resistant hammer head on the large-scale hammer mill.
Tup is the key part of large-scale hammer mill; Be widely used in broken industries such as cement, mine, traffic, building materials, power plant, metallurgy; It is a kind of consumable accessory; Annual metallic substance because of the wearing and tearing labor, the wear resisting property of grinder hammerhead and safety in utilization thereof are to estimate the important indicator of tup use properties.Along with the development of crushing mechanism industry, increasing problem goes out one after another, and material and the preparation technology thereof to wear-resistant hammer head has higher requirement like the expansion in broken field, disintegrating apparatus maximization etc.For large-scale tup, the strike position of general requirement tup has high firmness and certain toughness and the installation position has H.T. and certain rigidity.The large-scale tup of present widely used crusher mainly contains the composite hammer head series of high mangaenese steel series, two kinds of materials etc.High mangaenese steel series comprises ZGMn13, ZGMn18, ZGMn25 and various high mangaenese steel built-up welding tup, and composite hammer head series mainly is compound between carbon steel (or low alloy steel, high mangaenese steel etc.) and rich chromium cast iron or the wimet.
When common high mangaenese steel tup uses, can produce the work hardening phenomenon under the thump condition, thereby obtain good abrasion resistance.In order further to improve its wear resisting property, developed ultra-high manganese steel series tup, like ZGMn18, ZGMn25 etc.; But high mangaenese steel series tup good toughness and initial hardness is low; When particularly under the not enough condition of shock peening, using, the material wear-resistant performance is low, and the tup life-span is generally not high.For overcoming the above problems, on this basis, developed high mangaenese steel built-up welding tup again, improve the high firmness that tup hits the position, but such tup is after overlay cladding weares and teares, the wear resisting property of material descends rapidly; Composite hammer head series is owing to the recombining process reason, and two kinds of material metallurgical binding of tup are bad, is prone in the use phenomenon of rupture takes place, thereby has a strong impact on the security that equipment uses, and in addition, the casting technique of such tup and thermal treatment process are complicated.
Therefore; How to design a kind of tup, both made the strike position of tup have high firmness and certain toughness, the wear resisting property that satisfies tup requires, makes again the installation position of tup to have H.T. and certain rigidity; Guaranteeing the safety in utilization of tup, is problem to be solved by this invention.
Summary of the invention
To the demand, the invention provides a kind of under high and low impact condition, the large-scale wearable cast steel tup of the multi-element low alloyization that wear resisting property and safety in utilization are all good with graded performance.
The invention provides the large-scale wearable cast steel tup of a kind of multi-element low alloyization, it is characterized in that: the chemical ingredients and the weight percent thereof that constitute this tup are:
C:0.30-0.50%, Si:0.3-1.2%, Mn:0.5-1.5%, Cr:1.5-3.5%, Ni:0.3-1.5%, Mo:0.3-1.5%, V:0.05-0.30%, S＜0.05%, P＜0.05%, surplus is Fe.
Simultaneously, the present invention also provides a kind of preparation technology of tup, mainly comprises the following steps:
A) alloy melting is handled with rotten
Require to carry out alloying ingredient according to the chemical ingredients of tup, carry out alloy melting then, the alloy of fusing after deoxidation of molten steel is skimmed, is added the vanadium iron processing of going bad again, when liquid steel temperature reaches 1580-1620 ℃, the casting of coming out of the stove;
B) casting technique
Tup adopts the founding method of plane vertical pouring, top riser, and pouring temperature is 1480 ℃-1560 ℃, and cast later stages 1/3rd molten steel pours into from rising head.
C) thermal treatment process
C1) conditioning heat treatment: with certain rate of heating tup is heated to the suitable temp insulation, to eliminate or the chemical ingredients segregation of minimizing foundry goods and the ununiformity and the crystal grain thinning of tissue;
C2) quench treatment: tup is heated and is incubated, at first foundry goods is carried out integral quenching, again tup is hit the position and carry out secondary quenching;
C3) intermediate frequency localized tempering: high tempering is carried out in the tup installation position handle;
C4) low-temperaturetempering is handled: tup is carried out whole low-temperaturetempering handle.
In the present invention's one preferred embodiment, the adding in 5-8 minute before tapping of the used vanadium iron of rotten processing, the add-on of vanadium is 0.05-0.30%.
In the present invention's one preferred embodiment, the stage temperature increasing schedule is adopted in conditioning heat treatment, and middle holding temperature is 550-750 ℃; Soaking time is 2-5 hour; Final Heating temperature is 800-980 ℃, and soaking time is 3-10 hour, and rate of heating is controlled at 30-120 ℃/h.
In the present invention's one preferred embodiment, the proportioning of sodium silicate solution is 50% water, 45% water glass, 5% additive, requires the temperature of control quenchant to be no more than 70 ℃ during use.
In the present invention's one preferred embodiment, when the tup integral quenching was handled, the entry time was 2-8 minute, and tup surface leaving water temperature(LWT) is less than 200-300 ℃.
In the present invention's one preferred embodiment, when tup hit position secondary quenching processing, the entry position was the 1/4-1/2 of tup height, and the entry time is 5-25 second, and tup surface leaving water temperature(LWT) is less than 200-300 ℃.
In the present invention's one preferred embodiment, when temper was carried out in the tup installation position, heating and temperature control was at 580-780 ℃, and soaking time is 15-60 minute.
In the present invention's one preferred embodiment, further comprise step, the power failure stove is as cold as the 250-500 ℃ of air cooling of coming out of the stove again.
In the present invention's one preferred embodiment, tup is carried out whole low-temperaturetempering when handling, the Heating temperature of temper is 200-350 ℃, soaking time is 5-12 hour.
Adopt the performances such as hardness and toughness of the large-scale tup that preparation technology of the present invention produces to change in gradient, the strike position of having satisfied large-scale tup has high firmness and certain toughness, guarantees its high-wearing feature; The installation position of tup has H.T. and certain rigidity simultaneously; Has the transition connecting portion to the installation position from hitting the position; Each position performance of tup is changed in gradient; Thereby do not occur phenomenon of rupture in the assurance use, guarantee the safety in utilization of tup, and increase substantially its work-ing life.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed explanation:
Fig. 1 is the synoptic diagram of the tup of the embodiment of the invention;
Fig. 2 is the conditioning heat treatment and the quenching processing technology curve of multi-element low alloy wearable cast steel tup of the present invention;
Fig. 3 is the local intermediate frequency tempering of tup of the present invention position synoptic diagram;
Fig. 4 is that the tup gradient performance of the embodiment of the invention changes synoptic diagram;
Among the figure, the 1st, the installation position, the 2nd, hit the position, the 3rd, intermediate location.
Embodiment
In order to make those skilled in the art person understand technical scheme of the present invention better, and make above-mentioned purpose of the present invention, feature and advantage can be more obviously understandable, below in conjunction with embodiment and embodiment accompanying drawing the present invention done further detailed explanation.
As shown in Figure 1, Fig. 1 is the synoptic diagram of the tup of the embodiment of the invention, in the embodiment of the invention; Tup mainly is divided into three parts, comprises installation position 1, hits position 2 and intermediate location 3, and the installation position is provided with open hole; Be used for tup is installed on the disintegrating apparatus such as crusher etc., among the figure, hit position 2 and be mainly used in and impact ore or other hard thing; Intermediate location 3 is between installation position 1 and strike position 2, and whole tup is all formed by the casting of multi-element low alloy steel.
Chemical ingredients is the key factor of decision alloy property; Make large-scale low-alloy wear-resistant steel tup and at first must carry out the reasonable component design; To guarantee to have enough hardening capacity; Make tup obtain best structural state and satisfied mechanical property, work-ing life and security, and select for use economical, lower-cost alloying element to carry out alloying, obtain good economic benefit according to the resources supplIes of China.The chemical composition of the wear-resistant hammer head that the present invention designed and weight percentage thereof are:
C:0.30-0.50%, Si:0.3-1.2%, Mn:0.5-1.5%, Cr:1.5-3.5%, Ni:0.3-1.5%, Mo:0.3-1.5%, V:0.05-0.30%, S＜0.05%, P＜0.05%, surplus is Fe.
In addition; The preparation technology of the large-scale wearable cast steel tup of multi-element low alloyization of the present invention mainly comprises three steps: 1, alloy melting and rotten the processing; 2, the casting of tup; 3, thermal treatment process, wherein, thermal treatment process further comprises: conditioning heat treatment, quench treatment, intermediate frequency localized tempering, low-temperaturetempering are handled.
1, alloy melting and rotten the processing
At first, carry out alloying ingredient, carry out alloy melting at medium-frequency induction furnace then according to the chemical ingredients requirement of tup; With the fusing alloy after deoxidation of molten steel is skimmed; Add the vanadium iron processing of going bad again, vanadium iron is wrapped with iron sheet, is pressed into furnace bottom; When liquid steel temperature reaches 1580-1620 ℃, the casting of coming out of the stove.Certainly, need to prove, adopt the Medium frequency induction electric arc furnace, can reach the effect of alloy melting equally.
2, the casting of tup
Tup adopts the founding method of plane vertical pouring, top riser, and pouring temperature is controlled at 1480 ℃-1560 ℃, and in addition, the molten steel in cast later stage 1/3rd pours into through rising head.The casting scheme of tup plane vertical pouring, top riser belongs to the common practise of this area, and those skilled in the art are appreciated that the step and the controlled variable of this scheme of enforcement fully, do not describe in detail this applicant.
3, thermal treatment process
1) conditioning heat treatment: with certain rate of heating foundry goods is heated to the suitable temp insulation, eliminates or the chemical ingredients segregation of minimizing foundry goods and the ununiformity and the crystal grain thinning of tissue.
2) quench treatment: in well formula resistance furnace, carry out the heating and the insulation of tup by heating schedule, quenchant is the aqueous solution of water glass.Quenching is divided into the tup integral quenching and the tup local secondary quenches.
3) intermediate frequency localized tempering: in Medium Frequency Induction Heating Furnace high tempering is carried out in the tup part and handle.
4) low-temperaturetempering is handled: in chamber type electric resistance furnace, tup is carried out whole low-temperaturetempering and handle.
At first, prepare burden by following composition and proportioning: C:0.30%, Si:0.3%, Mn:0.5%, Cr:1.5%, Ni:0.3%, Mo:0.3%, V:0.05%, S:0.02%, P:0.01%, surplus is Fe.Then, carry out alloy melting at medium-frequency induction furnace or Medium frequency induction electric arc furnace, with the fusing alloy after deoxidation of molten steel is skimmed; Add the vanadium iron processing of going bad again, the add-on of vanadium iron is 0.05%, taps to be incorporated as suitable in preceding 5 minutes; Vanadium iron can be wrapped with iron sheet; Be pressed into furnace bottom, when liquid steel temperature reaches 1620 ℃, the casting of coming out of the stove.
Secondly, tup is cast, the founding method of tup adopts the founding method of plane vertical pouring, top riser, when Pour Steel also remains three/for the moment, pours into molten steel through rising head, and wherein, teeming temperature is controlled at 1520 ℃.
At last, tup is heat-treated technology, is specially:
(1) conditioning heat treatment: with certain rate of heating foundry goods is heated to the suitable temp insulation, eliminates or the chemical ingredients segregation of minimizing foundry goods and the ununiformity and the crystal grain thinning of tissue.So-called certain acceleration stresses refers to that specifically middle holding temperature is 650 ℃, and soaking time is 2 hours, and final Heating temperature is 800 ℃, and soaking time is 3 hours, and rate of heating is controlled at 30 ℃/h, and is as shown in Figure 2.
(2) quench treatment: in well formula resistance furnace, carry out the heating and the insulation of tup by the heating schedule (see figure 2), wherein, quenchant is the aqueous solution of water glass, earlier foundry goods is carried out integral quenching, again tup is hit the position and carries out secondary quenching.Wherein, when the tup integral quenching was handled, the entry time was 2 minutes; Tup surface leaving water temperature(LWT) is less than 200 ℃, and wherein, when tup is hit the position secondary quenching and handles; The entry position is 1/4 of a tup height, and the entry time is 5 seconds, and tup surface leaving water temperature(LWT) is less than 200 ℃.In the embodiment of the invention, the proportioning of sodium silicate solution is 50% water, 45% water glass, 5% additive, requires the temperature of control quenchant to be no more than 70 ℃ during use.
(3) intermediate frequency localized tempering: local in Medium Frequency Induction Heating Furnace to tup, specifically, to the installation position of tup; As shown in Figure 3, carry out high tempering and handle, earlier with heating and temperature control at 580 ℃; Soaking time is 15 minutes, and the stove that has a power failure again is as cold as 250 ℃ of air coolings of coming out of the stove again.
(4) low-temperaturetempering is handled: in chamber type electric resistance furnace, tup is carried out whole low-temperaturetempering and handle, wherein, the Heating temperature of temper is 200 ℃, and soaking time is 5 hours.
At first, prepare burden by following composition and proportioning: C:0.40%, Si:0.8%, Mn:1%, Cr:2.5%, Ni:1%, Mo:1%, V:0.15%, S:0.01%, P:0.02%, surplus is Fe.Then, carry out alloy melting at medium-frequency induction furnace or Medium frequency induction electric arc furnace, with the fusing alloy after deoxidation of molten steel is skimmed; Add the vanadium iron processing of going bad again, the add-on of vanadium iron is 0.15%, taps to be incorporated as suitable in preceding 6 minutes; Vanadium iron can be wrapped with iron sheet; Be pressed into furnace bottom, when liquid steel temperature reaches 1600 ℃, the casting of coming out of the stove.
Secondly, tup is cast, the founding method of tup adopts the founding method of plane vertical pouring, top riser, when Pour Steel also remains three/for the moment, pours into molten steel through rising head, and wherein, temperature is controlled at 1560 ℃.
At last, tup is heat-treated technology, is specially:
(1) conditioning heat treatment: with certain rate of heating foundry goods is heated to the suitable temp insulation, eliminates or the chemical ingredients segregation of minimizing foundry goods and the ununiformity and the crystal grain thinning of tissue.So-called certain acceleration stresses refers to that specifically middle holding temperature is 550 ℃, and soaking time is 3.5 hours, and final Heating temperature is 900 ℃, and soaking time is 5 hours, and rate of heating is controlled at 120 ℃/h, and is as shown in Figure 2.
(2) quench treatment: in well formula resistance furnace, carry out the heating and the insulation of tup by the heating schedule (see figure 2), wherein, quenchant is the aqueous solution of water glass, earlier foundry goods is carried out integral quenching, again tup is hit the position and carries out secondary quenching.Wherein, when the tup integral quenching was handled, the entry time was 5 minutes; Tup surface leaving water temperature(LWT) is less than 250 ℃, and wherein, when tup is hit the position secondary quenching and handles; The entry position is 1/3 of a tup height, and the entry time is 25 seconds, and tup surface leaving water temperature(LWT) is less than 250 ℃.In the embodiment of the invention, the proportioning of sodium silicate solution is 50% water, 45% water glass, 5% additive, requires the temperature of control quenchant to be no more than 70 ℃ during use.
(3) intermediate frequency localized tempering: local in Medium Frequency Induction Heating Furnace to tup, specifically, to the installation position of tup; As shown in Figure 3, carry out high tempering and handle, earlier with heating and temperature control at 780 ℃; Soaking time is 30 minutes, and the stove that has a power failure again is as cold as 300 ℃ of air coolings of coming out of the stove again.
(4) low-temperaturetempering is handled: in chamber type electric resistance furnace, tup is carried out whole low-temperaturetempering and handle, wherein, the Heating temperature of temper is 300 ℃, and soaking time is 8 hours.
At first, prepare burden by following composition and proportioning: C:0.50%, Si:1.2%, Mn:1.5%, Cr:3.5%, Ni:1.5%, Mo:1.5%, V:0.30%, S:0.04%, P:0.04%, surplus is Fe.Then, carry out alloy melting at medium-frequency induction furnace or Medium frequency induction electric arc furnace, with the fusing alloy after deoxidation of molten steel is skimmed; Add the vanadium iron processing of going bad again, the add-on of vanadium iron is 0.30%, taps to be incorporated as suitable in preceding 8 minutes; Vanadium iron can be wrapped with iron sheet; Be pressed into furnace bottom, when liquid steel temperature reaches 1580 ℃, the casting of coming out of the stove.
Secondly, tup is cast, the founding method of tup adopts the founding method of plane vertical pouring, top riser, when Pour Steel also remains three/for the moment, pours into molten steel through rising head, and wherein, teeming temperature is controlled at 1480 ℃.
At last, tup is heat-treated technology, is specially:
(1) conditioning heat treatment: with certain rate of heating foundry goods is heated to the suitable temp insulation, eliminates or the chemical ingredients segregation of minimizing foundry goods and the ununiformity and the crystal grain thinning of tissue.So-called certain acceleration stresses refers to that specifically middle holding temperature is 750 ℃, and soaking time is 5 hours, and final Heating temperature is 980 ℃, and soaking time is 10 hours, and rate of heating is controlled at 50 ℃/h, and is as shown in Figure 2.
(2) quench treatment: in well formula resistance furnace, carry out the heating and the insulation of tup by the heating schedule (see figure 2), wherein, quenchant is the aqueous solution of water glass, earlier foundry goods is carried out integral quenching, again tup is hit the position and carries out secondary quenching.Wherein, when the tup integral quenching was handled, the entry time was 8 minutes; Tup surface leaving water temperature(LWT) is less than 300 ℃, and wherein, when tup is hit the position secondary quenching and handles; The entry position is 1/2 of a tup height, and the entry time is 20 seconds, and tup surface leaving water temperature(LWT) is less than 300 ℃.In the embodiment of the invention, the proportioning of sodium silicate solution is 50% water, 45% water glass, 5% additive, requires the temperature of control quenchant to be no more than 70 ℃ during use.
(3) intermediate frequency localized tempering: local in Medium Frequency Induction Heating Furnace to tup, specifically, to the installation position of tup; As shown in Figure 3, carry out high tempering and handle, earlier with heating and temperature control at 700 ℃; Soaking time is 60 minutes, and the stove that has a power failure again is as cold as 500 ℃ of air coolings of coming out of the stove again.
(4) low-temperaturetempering is handled: in chamber type electric resistance furnace, tup is carried out whole low-temperaturetempering and handle, wherein, the Heating temperature of temper is 350 ℃, and soaking time is 12 hours.
Application implementation example 1
Having produced overall dimension according to the large-scale wearable cast steel tup of above-mentioned multi-element low alloyization chemical ingredients proportioning and preparation technology thereof is the large-scale wearable cast steel tup of the multi-element low alloyization with graded performance that 410mm (length) * 320mm (wide) * 120mm (thick), weight reach 90Kg.It is that 50-52HRC, mounting portion surface hardness are 28-35HRC that tup hits the position sheet surface hardness, from hit the position sheet surface hardness to the mounting portion surface hardness graded.The actual service condition of 1618 single block hammer crushers (production of Changshu bodyguard name company) of such tup one tame professional building stones factory in Beijing is following: (1) general high mangaenese steel (ZGMn13Cr2)+built-up welding tup uses fate to be 45-70 days; Ten thousand tons of broken building stones 9-15; And two covers have actual the uses sky number average of the large-scale wearable cast steel tup of multi-element low alloyization of graded performance and reach more than 110 days; Actual broken amount of stone is above 220,000 tons; Compare with high mangaenese steel (ZGMn13Cr2)+built-up welding tup, the actual breaking capacity of low-alloy tup improves more than 50%; (2) broken situation is more stable in the low-alloy tup production process, does not have the phenomenon that gets stuck, and has reduced replacing tup number of times during use, and working strength of workers obviously reduces, and has improved the crushing efficiency and the working hour of equipment simultaneously.
Therefore, the large-scale wearable cast steel tup of the multi-element low alloyization of graded performance has tangible energy conservation and consumption reduction effects, applies to have remarkable economic efficiency and social benefit.
Application implementation example 2
Having produced overall dimension according to the large-scale wearable cast steel tup of above-mentioned multi-element low alloyization chemical ingredients proportioning and preparation technology thereof is the large-scale wearable cast steel tup of the multi-element low alloyization with graded performance that 460mm (length) * 365mm (wide) * 135mm (thick), weight reach 122Kg.It is that 50-52HRC, mounting portion surface hardness are 28-35HRC that tup hits the position sheet surface hardness, from hit the position sheet surface hardness to the mounting portion surface hardness graded.Such tup is following in the actual service condition of 1370 single block hammer crushers (production of Changshu bodyguard name company) in cement mill, mountain, conch Cement Group Baima: (1) general high mangaenese steel (ZGMn13Cr2)+built-up welding tup uses fate to be 14-21 days; Ten thousand tons of broken building stones 12-18; And a cover has actual the uses sky number average of the large-scale wearable cast steel tup of multi-element low alloyization of graded performance and reaches more than 45 days; Actual broken amount of stone is above 380,000 tons; Compare with high mangaenese steel (ZGMn13Cr2)+built-up welding tup, the actual breaking capacity of low-alloy tup improves more than 100%; (2) broken situation is more stable in the low-alloy tup production process, does not have the phenomenon that gets stuck, and has reduced replacing tup number of times during use, and working strength of workers obviously reduces, and in addition, has also improved the crushing efficiency and the working hour of equipment.
Application implementation example 3
Because the large-scale wearable cast steel tup of multi-element low alloyization of graded performance has tangible energy conservation and consumption reduction effects, apply and have remarkable economic efficiency and social benefit.The contriver according to easy first and difficult later, first hand hammer head after big tup and first single block hammer crusher use the popularization steps that back two section hammer mills are used, having produced overall dimension according to the large-scale wearable cast steel tup of above-mentioned multi-element low alloyization chemical ingredients proportioning and preparation technology thereof is the large-scale wearable cast steel tup of the multi-element low alloyization with graded performance that 465mm (length) * 365mm (wide) * 142mm (thick), weight reach 132Kg.It is that 49-52HRC, mounting portion surface hardness are 28-35HRC that tup hits the position sheet surface hardness, from hit the position sheet surface hardness to the mounting portion surface hardness graded.Such tup is intended the practical application of carrying out at two section hammer mills (production of Changshu bodyguard name company) in one tame cement mill, conch Cement Group Zhejiang.The preparation work that installation is at present used is all accomplished.
Large-scale wearable cast steel tup of the multi-element low alloyization with graded performance of utilizing the present invention to prepare and high mangaenese steel series tup relatively have advantage: (1) is being impacted under the not high condition of deficiency or abrasive hardness; Because this tup initial hardness height or high firmness zone are big, the wear resisting property of tup improves more than 80% than the serial tup of high mangaenese steel; (2) under the hard condition of thump or abrasive material,, guarantee the safety in utilization that phenomenon of rupture does not occur in the use, improved tup because the performance of this tup changes in gradient; In addition, the initial hardness height of this tup or high firmness zone are big, and the wear resisting property of tup improves more than 50% than the serial tup of high mangaenese steel.Therefore, this tup has advantage safe to use, that wear resisting property is good and use range is wide.
Performances such as the hardness of the wear-resistant hammer head that the present invention discloses and toughness change in gradient, see also Fig. 4, and the strike position of having satisfied large-scale tup has high firmness and certain toughness, guarantees its high-wearing feature; The installation position of tup has H.T. and certain rigidity simultaneously; Has the transition connection portion to the installation position from hitting the position; Tup each several part performance is changed in gradient; Thereby do not occur phenomenon of rupture in the assurance use, guarantee the safety in utilization of tup, and increase substantially its work-ing life.
The above is merely embodiment of the present invention.Protection scope of the present invention is not limited thereto, and any technician who is familiar with the present technique field is in the technical scope that the present invention discloses, and the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claim was defined.
Claims (4)
1. the preparation technology of the large-scale wearable cast steel tup of multi-element low alloyization is characterized in that, the chemical ingredients and the weight percent thereof that constitute this tup are:
C:0.30-0.50%, Si:0.3-1.2%, Mn:0.5-1.5%, Cr:1.5-3.5%, Ni:0.3-1.5%, Mo:0.3-1.5%, V:0.05-0.30%, S＜0.05%, P＜0.05%, surplus is Fe;
Said preparation technology mainly comprises the following steps:
A) alloy melting is handled with rotten
Require to carry out alloying ingredient according to the chemical ingredients of tup, carry out alloy melting then, the alloy of fusing after deoxidation of molten steel is skimmed, is added the vanadium iron processing of going bad again, when liquid steel temperature reaches 1580-1620 ℃, the casting of coming out of the stove;
B) casting technique
Tup adopts the founding method of plane vertical pouring, top riser, and pouring temperature is 1480 ℃-1560 ℃, and cast later stages 1/3rd molten steel pours into from rising head;
C) thermal treatment process
1) conditioning heat treatment: tup is heated to the suitable temp insulation with certain rate of heating; Be specially: middle holding temperature is 550-750 ℃, and soaking time is 2-5 hour, and final Heating temperature is 800-980 ℃; Soaking time is 3-10 hour, and rate of heating is controlled at 30-120 ℃/h; To eliminate or the chemical ingredients segregation of minimizing foundry goods and the ununiformity and the crystal grain thinning of tissue;
2) quench treatment: tup is heated and is incubated, at first foundry goods is carried out integral quenching, the entry time is 2-8 minute, and tup surface leaving water temperature(LWT) is less than 200-300 ℃; Again tup is hit the position and carry out secondary quenching, the entry position is the 1/4-1/2 of tup height, and the entry time is 5-25 second, and tup surface leaving water temperature(LWT) is less than 200-300 ℃;
3) intermediate frequency localized tempering: high tempering is carried out in the tup installation position handle, heating and temperature control is at 580-780 ℃, and soaking time is 15-60 minute;
4) low-temperaturetempering is handled: tup is carried out whole low-temperaturetempering handle, the Heating temperature of temper is 200-350 ℃, and soaking time is 5-12 hour.
2. the preparation technology of the large-scale wearable cast steel tup of multi-element low alloyization as claimed in claim 1 is characterized in that: the adding in 5-8 minute before tapping of the used vanadium iron of rotten processing, the add-on of vanadium iron is 0.05-0.30%.
3. the preparation technology of the large-scale wearable cast steel tup of multi-element low alloyization as claimed in claim 1; It is characterized in that: employed quenchant is a sodium silicate solution in the said quench treatment; Its proportioning is 50% water, 45% water glass, 5% additive, requires the temperature of control quenchant to be no more than 70 ℃ during use.
4. the preparation technology of the large-scale wearable cast steel tup of multi-element low alloyization as claimed in claim 1, the insulation of tup installation position is after 15-60 minute, and it is characterized in that: further comprise step, the power failure stove is as cold as the 250-500 ℃ of air cooling of coming out of the stove again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910251698A CN102115850B (en) | 2009-12-31 | 2009-12-31 | Multi-component low-alloyed large-scale wear-resistant cast steel hammerhead and preparation process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910251698A CN102115850B (en) | 2009-12-31 | 2009-12-31 | Multi-component low-alloyed large-scale wear-resistant cast steel hammerhead and preparation process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102115850A CN102115850A (en) | 2011-07-06 |
| CN102115850B true CN102115850B (en) | 2012-10-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2563696C1 (en) * | 2014-07-03 | 2015-09-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Алтайский государственный аграрный университет" (ФГБОУ ВПО АГАУ) | Method of production of plate hammer of feed grinder |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102660713B (en) * | 2012-05-23 | 2014-04-16 | 攀枝花市白云铸造有限责任公司 | Sectional hardness low-alloy steel hammer head and thermal treatment method thereof |
| CN102764680B (en) * | 2012-07-12 | 2015-07-22 | 中建材宁国新马耐磨材料有限公司 | Impact crusher plate hammer and manufacturing method thereof |
| CN102766813A (en) * | 2012-07-12 | 2012-11-07 | 中建材宁国新马耐磨材料有限公司 | Hammer head for crushing building stones, and manufacturing method of hammer head |
| CN103397278A (en) * | 2013-07-01 | 2013-11-20 | 安徽三联泵业股份有限公司 | Multielement low alloy wear resistant cast steel and preparation method thereof |
| CN104096617A (en) * | 2014-07-09 | 2014-10-15 | 史丹利化肥宁陵有限公司 | Smashing swing head structure of chain-breaking crusher |
| CN104209163B (en) * | 2014-09-06 | 2016-11-23 | 北京工业大学 | A kind of Compound wear-resisting hammer and preparation method thereof |
| CN104911500B (en) * | 2015-06-26 | 2017-01-11 | 龙岩盛丰机械制造有限公司 | Manufacturing method of low-temperature wear-resistant carriage |
| CN106636923A (en) * | 2016-12-30 | 2017-05-10 | 天津威尔朗科技有限公司 | Drill rod and preparation method thereof |
| CN109112284B (en) * | 2017-06-26 | 2020-02-14 | 魏大明 | Production manufacturing process for realizing step hardness of alloy steel hammer head |
| CN108193134A (en) * | 2018-01-25 | 2018-06-22 | 内蒙金属材料研究所 | A kind of coal breaker tup novel low-alloy steel and its heat treatment method |
| CN112665937A (en) * | 2020-12-30 | 2021-04-16 | 郑州鼎盛高新能源工程技术有限公司 | Novel method for quickly testing mechanical property of large hammer head base body |
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| CN1385628A (en) * | 2002-02-27 | 2002-12-18 | 铁道科学研究院机车车辆研究所 | Material for brake disc of high-speed train |
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| CN1385549A (en) * | 2002-01-15 | 2002-12-18 | 江苏省机电研究所 | Intermediate carbon multielement low alloy wear-resistant casting steel |
| CN1385628A (en) * | 2002-02-27 | 2002-12-18 | 铁道科学研究院机车车辆研究所 | Material for brake disc of high-speed train |
| CN1740367A (en) * | 2005-09-14 | 2006-03-01 | 刘承刚 | High strength heat resistant antiwear vertical mill sheath and its making process |
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| RU2563696C1 (en) * | 2014-07-03 | 2015-09-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Алтайский государственный аграрный университет" (ФГБОУ ВПО АГАУ) | Method of production of plate hammer of feed grinder |
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| CN102115850A (en) | 2011-07-06 |
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