CN111496415A - High-performance movable and fixed cone in cone crusher and preparation method thereof - Google Patents
High-performance movable and fixed cone in cone crusher and preparation method thereof Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 238000003466 welding Methods 0.000 claims abstract description 81
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
- B23K35/3073—Fe as the principal constituent with Mn as next major constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/40—Making wire or rods for soldering or welding
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- Mechanical Engineering (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention provides a high-performance movable cone and a fixed cone in a cone crusher, which comprise a movable cone and a fixed cone, wherein a cavity is formed between the movable cone and the fixed cone; the movable cone and the fixed cone are both composed of a base body and a wear-resistant layer, the wear-resistant layer is overlaid on the base body, is respectively positioned on the outer surface of the movable cone and the inner surface of the fixed cone, and is distributed on the severely worn parts of the movable cone and the fixed cone. The wearing layer comprises sequentially laminated priming coat, buffer layer, transition layer and cover layer. The invention also discloses a preparation method of the welding wire, which is used for preparing the welding wire required by the priming coat, the buffer layer, the transition layer and the cover coat; and overlaying a wear-resistant layer on the substrate by an overlaying process. The dynamic and fixed cone consists of the high manganese steel matrix and the wear-resistant composite layer, has the characteristics of high wear resistance and high impact, can be repeatedly repaired and utilized when being worn to a certain degree, effectively increases the wear resistance of the dynamic and fixed cone, improves the impact toughness of the dynamic and fixed cone, reduces the labor operation intensity and the production cost, and prolongs the service life.
Description
Technical Field
The invention relates to the technical field of mechanical manufacturing and welding, in particular to a high-performance movable and fixed cone in a cone crusher and a preparation method thereof.
Background
The cone crusher is an advanced hydraulic crusher with high power, large crushing ratio and high productivity, and is widely applied to the aspects of superfine crushing of hard rocks, ores, slag, refractory materials and the like. In the working process of the cone crusher, the motor drives the eccentric sleeve to rotate through the transmission device, the movable cone rotationally swings under the action of the eccentric sleeve, the section of the movable cone close to the fixed cone becomes a crushing cavity, and materials are crushed by multiple times of extrusion and impact of the movable cone and the fixed cone. Because the cone crusher moves awl and fixed cone and receives the impact and the wearing and tearing of material in the use, its surface wearing and tearing volume is very big, leads to smashing the chamber space distance grow, and the material granularity increases still needs to carry out the secondary crushing, has influenced operating efficiency and product quality.
In the manufacture of the movable cone and the fixed cone of the existing cone crusher, the movable cone and the fixed cone are basically cast integrally, the materials are generally ZGMn13-ZGMn18 alloy series, and a certain amount of alloy elements such as Cr, Mo, Ti and the like are added into the alloy system to improve the wear resistance and impact toughness of a matrix and prolong the service life. However, because the movable cone and the fixed cone are both austenitic stainless steel subjected to water toughening treatment, the surface of the stainless steel is formed into martensitic stainless steel after the stainless steel is subjected to impact hardening, and the surface hardness of the stainless steel is HRC 40-50. The movable cone and the fixed cone can only be scrapped after being worn to a certain degree and cannot be reused, so that the service life of the movable cone and the fixed cone is influenced.
Disclosure of Invention
According to the technical problem that the service life of the high-performance movable fixed cone in the cone crusher is influenced because the movable cone and the fixed cone are both made of austenitic stainless steel subjected to water toughening treatment, the surface of the martensitic stainless steel is formed after impact hardening, the surface hardness of the martensitic stainless steel is HRC40-50, and the movable cone and the fixed cone can only be scrapped and cannot be reused after being worn to a certain degree, so that the service life of the high-performance movable fixed cone in the cone crusher is influenced. The invention mainly utilizes the position of the dynamic and fixed cone, which is seriously worn, to build up a wear-resistant composite layer, and when the wear reaches a certain degree, the wear-resistant composite layer can be repeatedly repaired and utilized, thereby improving the wear resistance and impact toughness of the dynamic and fixed cone and prolonging the service life.
The technical means adopted by the invention are as follows:
a high performance dynamic and static cone in a cone crusher comprising: the movable cone and the fixed cone form a cavity therebetween; the movable cone and the fixed cone are both composed of a base body and a wear-resistant layer, the wear-resistant layer is overlaid on the base body, is respectively positioned on the outer surface of the movable cone and the inner surface of the fixed cone, and is distributed on the severely worn parts of the movable cone and the fixed cone.
Furthermore, the material of the substrate is ZGMn18Cr2, and alloying elements such as Mo, V and Re are added to refine grains and improve impurity distribution; the carbide is uniformly and solidly melted by a high-temperature strengthening water toughening treatment process, so that the wear resistance and impact toughness of the matrix are ensured; the hardness of the matrix after the high-temperature strengthening water toughening treatment is HB220-260, and the impact value is 100-2。
Furthermore, the wear-resistant layer consists of a bottom layer, a buffer layer, a transition layer and a cover surface layer which are sequentially stacked, wherein the bottom layer is in contact with the substrate; the thickness of the wear resistant layer is set according to the allowable range of the working clearance of the cavity.
Further, the bottom layer mainly comprises a low-carbon Mn-Cr alloy material, and the low-carbon Mn-Cr alloy material comprises the following components in percentage by mass:
c: 0.02 to 0.05%, Mn: 16-18%, Si: 0.2-0.5%, Cr: 2.5-4.0%, Mo: 0.5-1.0% and the balance Fe.
Further, the buffer layer mainly comprises a low-carbon Cr-Mo-Nb alloy material, and the low-carbon Cr-Mo-Nb alloy material comprises the following components in percentage by mass:
c: 0.02 to 0.05%, Mn: 1.0-1.5%, Si: 0.3-0.8%, Cr: 3-4.5%, Mo: 1.5-2.5%, Nb: 1.5-2.5%; the balance being Fe.
Further, the transition layer mainly comprises a high-carbon Cr-Mo-Nb-W alloy material, and the high-carbon Cr-Mo-Nb-W alloy material comprises the following components in percentage by mass:
c: 0.6-0.9%, Mn: 1.5-2.5%, Si: 0.5-1.5%, Cr: 6.5-8%, Mo: 1.5-2.5%, Nb: 1.5-2.5%, W: 1.0-3.0%, V: 0.5 to 1.0%, Re: 0.1-0.3%, and the balance Fe.
Further, the facing layer mainly comprises a high-carbon Nb-W alloy material, and the high-carbon Nb-W alloy material comprises the following components in percentage by mass:
c: 1.0-1.5%, Mn: 0.5 to 1.5%, Si: 1.0-1.5%, Cr: 4.0-6.0%, Nb: 7.0-9.0%, W: 1.0-3.0%, V: 0.5 to 1.0%, Re: 0.1-0.3%, and the balance Fe.
The invention also provides a preparation method of the high-performance movable cone and the fixed cone in the cone crusher, which comprises the following steps:
s1, preparing welding wires;
s11, preparing surfacing materials needed by the bottom layer, the buffer layer, the transition layer and the cover layer respectively;
s12, converting the component elements in each surfacing material according to the proportion, selecting corresponding metal compounds or alloy powder, and uniformly mixing the metal compounds or the alloy powder in a powder mixer according to the proportion to obtain powder of each material;
s13, obtaining welding wires required by manufacturing the bottom layer, the buffer layer, the transition layer and the cover layer by using the powder of each material;
s2, overlaying a wear-resistant layer on the substrate through an overlaying process;
s21, selecting surfacing equipment;
s22, selecting ZGMn18Cr2 as a base sample material, wherein the specification of the sample is phi 500 × 600mm or phi 300 × 600mm, carrying out mechanical processing on the surfacing surface of the base to expose metallic luster, and carrying out flaw detection on the sample to ensure that no crack or slag inclusion defects exist;
s23, preheating the whole sample before welding, wherein the preheating temperature is 150 ℃, the heating rate is 40-50 ℃/h, and the heat preservation time is 4-6 h;
s24, carrying out surfacing welding by using welding wires of the bottom layer, the buffer layer, the transition layer and the cover layer;
s25, wrapping the steel plate with heat preservation cotton after surfacing, slowly cooling the steel plate to below 150 ℃, and then performing tempering treatment after welding;
s26, carrying out postweld heat treatment, wherein the postweld heat treatment conditions are as follows:
furnace temperature when entering the furnace: <150 ℃, rate of temperature rise: 30-50 ℃/h, heat preservation temperature: 200 +/-10 ℃, heat preservation time: 6-8 h, cooling speed: 25-40 ℃/h, tapping temperature: <100 ℃.
Further, in step S13, the method for manufacturing the welding wire specifically includes the following steps:
s131, selecting four groups of cold-rolled steel strips with the thickness of 0.3-0.8 mm, and longitudinally shearing the width of each cold-rolled steel strip into 8-10 mm by using a slitting machine;
s132, rolling each cut cold-rolled steel strip into a U-shaped section on a wire rolling mill, and filling each mixed material powder into each U-shaped groove respectively;
s133, rolling each steel strip into a welding wire blank tube with an O-shaped uniform section, wherein the diameter of the O-shaped O-;
s134, drawing each welding wire blank tube to a finished welding wire by using a multi-connected linear wire drawing machine, wherein the diameter of the finished welding wire is phi 2.4-3.2 mm, and then respectively winding the finished welding wire into standard disc-shaped welding wires to obtain the welding wires of the bottoming layer, the buffer layer, the transition layer and the cover surface layer.
Further, in step S24, the build-up welding sequence is:
s241, using a welding wire for manufacturing the base layer, overlaying a base layer on the substrate, wherein the thickness of one-side overlaying is 2-2.5 mm;
s242, after overlaying of the bottom layer, overlaying a buffer layer on the bottom layer by using a welding wire for manufacturing the buffer layer, wherein the thickness of one-side overlaying is 2-2.5 mm;
s243, after surfacing of the buffer layer, surfacing two transition layers on the buffer layer by using a welding wire for manufacturing the transition layers, wherein the thickness of one-side surfacing is 4-5 mm;
s244, after overlaying of the transition layer, overlaying two covering layers on the transition layer by using welding wires for manufacturing the covering layers, wherein the thickness of one-side overlaying is 4-5 mm; the build-up welding thickness of the whole workpiece is 12-15 mm.
Compared with the prior art, the invention has the following advantages:
1. the high-performance movable fixed cone in the cone crusher and the preparation method thereof effectively solve the problems of the abrasion resistance and the repairability of the base body of the mine movable fixed cone, and improve the abrasion resistance and the impact toughness of the movable fixed cone; the utilization rate of the matrix is improved through the additive manufacturing technology.
2. The high-performance movable fixed cone in the cone crusher and the preparation method thereof provided by the invention have the advantages that the movable fixed cone consists of the high manganese steel base body and the wear-resistant composite layer, has the characteristics of high wear resistance and high impact, can be repeatedly repaired and utilized when being worn to a certain degree, effectively increases the wear resistance of the movable fixed cone, improves the impact toughness of the movable fixed cone, reduces the labor operation intensity and the production cost, and prolongs the service life.
In conclusion, the technical scheme of the invention can solve the problems that in the prior art, the moving cone and the fixed cone are both austenitic stainless steel subjected to water toughening treatment, the surface of the martensitic stainless steel is formed after impact hardening, the surface hardness of the martensitic stainless steel is HRC40-50, the moving cone and the fixed cone can only be scrapped after being worn to a certain degree, and cannot be reused, and the service life of the moving cone and the fixed cone is influenced.
For the reasons, the invention can be widely popularized in the fields of mechanical manufacturing, welding and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a high performance dynamic and fixed cone of the present invention.
Fig. 2 is a schematic structural view of the composite wear-resistant layer of the present invention.
In the figure: 1. moving a cone; 2. fixing a cone; 3. a wear layer; 31. priming a bottom layer; 32. a buffer layer; 33. a transition layer; 34. a cover layer; 4. a cavity; 5. a substrate.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
As shown in fig. 1-2, the present invention provides a high performance movable cone and fixed cone in a cone crusher, which has a long life, high wear resistance, and is capable of being additively manufactured, comprising: the device comprises a movable cone 1 and a fixed cone 2, wherein a cavity 4 is formed between the movable cone 1 and the fixed cone 2; the movable cone 1 and the fixed cone 2 are both composed of a base body 5 and a wear-resistant layer 3, the wear-resistant layer 3 is overlaid on the base body 5, is respectively positioned on the outer surface of the movable cone 1 and the inner surface of the fixed cone 2, and is distributed on the severely worn parts of the movable cone 1 and the fixed cone 2.
The material of the substrate 5 is ZGMn18Cr2, and alloying elements such as Mo, V, Re and the like are added to refine grains and improve impurity distribution; carbide is uniformly and solidly melted by a high-temperature strengthening water toughening treatment process, so that the wear resistance and impact toughness of the matrix 5 are ensured; the hardness of the matrix 5 after the high-temperature strengthening water toughening treatment is HB220-260, and the impact value is 100-120J/cm2。
The wear-resistant layer 3 is composed of a bottom layer 31, a buffer layer 32, a transition layer 33 and a cover surface layer 34 which are sequentially stacked, wherein the bottom layer 31 is in contact with the base body 5; the thickness of the wear resistant layer 3 is set according to the working clearance allowance range of the cavity 4.
The bottom layer 31 is mainly composed of a low-carbon Mn-Cr alloy material, and the low-carbon Mn-Cr alloy material comprises the following components in percentage by mass:
c: 0.02 to 0.05%, Mn: 16-18%, Si: 0.2-0.5%, Cr: 2.5-4.0%, Mo: 0.5-1.0% and the balance Fe.
The buffer layer 32 is mainly composed of a low-carbon Cr-Mo-Nb alloy material, which comprises the following components in percentage by mass:
c: 0.02 to 0.05%, Mn: 1.0-1.5%, Si: 0.3-0.8%, Cr: 3-4.5%, Mo: 1.5-2.5%, Nb: 1.5-2.5%; the balance being Fe.
The transition layer 33 mainly comprises a high-carbon Cr-Mo-Nb-W alloy material, and the high-carbon Cr-Mo-Nb-W alloy material comprises the following components in percentage by mass:
c: 0.6-0.9%, Mn: 1.5-2.5%, Si: 0.5-1.5%, Cr: 6.5-8%, Mo: 1.5-2.5%, Nb: 1.5-2.5%, W: 1.0-3.0%, V: 0.5 to 1.0%, Re: 0.1-0.3%, and the balance Fe.
The facing layer 34 is mainly composed of a high-carbon Nb-W alloy material, and the high-carbon Nb-W alloy material comprises the following components in percentage by mass:
c: 1.0-1.5%, Mn: 0.5 to 1.5%, Si: 1.0-1.5%, Cr: 4.0-6.0%, Nb: 7.0-9.0%, W: 1.0-3.0%, V: 0.5 to 1.0%, Re: 0.1-0.3%, and the balance Fe.
The invention also provides a preparation method of the high-performance movable cone and the fixed cone in the cone crusher, which comprises the following steps:
s1, preparing welding wires;
s11, preparing surfacing materials needed by the bottom layer 31, the buffer layer 32, the transition layer 33 and the cover layer 34 respectively;
s12, converting component elements (C, Mn, Si, Cr, Nb, W, V, Re and Fe) in each surfacing material according to the proportion, selecting corresponding metal compounds or alloy powder, and uniformly mixing the metal compounds or the alloy powder in a powder mixer according to the proportion to obtain material powder;
s13, obtaining welding wires required for manufacturing the bottom layer 31, the buffer layer 32, the transition layer 33 and the cover layer 34 by utilizing the powder of each material;
s2, overlaying the wear-resistant layer 3 on the substrate 5 through an overlaying process;
s21, selecting surfacing equipment;
s22, selecting ZGMn18Cr2 as a sample material of the substrate 5, wherein the specification of the sample is phi 500 × 600mm or phi 300 × 600mm, carrying out mechanical processing on the surfacing surface of the substrate 5 to expose metallic luster, and carrying out flaw detection on the sample to ensure that no crack or slag inclusion defects exist;
s23, preheating the whole sample before welding, wherein the preheating temperature is 150 ℃, the heating rate is 40-50 ℃/h, and the heat preservation time is 4-6 h;
s24, carrying out surfacing welding by using welding wires of the bottom layer 31, the buffer layer 32, the transition layer 33 and the cover layer 34;
s25, wrapping the steel plate with heat preservation cotton after surfacing, slowly cooling the steel plate to below 150 ℃, and then performing tempering treatment after welding;
s26, carrying out postweld heat treatment, wherein the postweld heat treatment conditions are as follows:
furnace temperature when entering the furnace: <150 ℃, rate of temperature rise: 30-50 ℃/h, heat preservation temperature: 200 +/-10 ℃, heat preservation time: 6-8 h, cooling speed: 25-40 ℃/h, tapping temperature: <100 ℃.
In step S13, the method for manufacturing the welding wire specifically includes the following steps:
s131, selecting four groups of cold-rolled steel strips with the thickness of 0.3-0.8 mm, and longitudinally shearing the width of each cold-rolled steel strip into 8-10 mm by using a slitting machine;
s132, rolling each cut cold-rolled steel strip into a U-shaped section on a wire rolling mill, and filling each mixed material powder into each U-shaped groove respectively;
s133, rolling each steel strip into a welding wire blank tube with an O-shaped uniform section, wherein the diameter of the O-shaped O-;
s134, drawing each welding wire blank tube to a finished welding wire by using a multi-connected linear wire drawing machine, wherein the diameter of the finished welding wire is phi 2.4-3.2 mm, and then respectively winding the finished welding wire into standard disc-shaped welding wires to obtain the welding wires of the bottom layer 31, the buffer layer 32, the transition layer 33 and the cover surface layer 34.
In step S24, the build-up welding sequence is:
s241, using a welding wire for manufacturing the bottom layer 31, overlaying a layer of the bottom layer 31 on the substrate 5, wherein the thickness of one-side overlaying is 2-2.5 mm;
s242, after the overlaying of the bottom layer 31 is finished, a layer of buffer layer 32 is overlaid on the bottom layer 31 by using the welding wire for manufacturing the buffer layer 32, and the thickness of the single-side overlaying is 2-2.5 mm;
s243, after surfacing of the buffer layer 32 is finished, surfacing two layers of the transition layers 33 on the buffer layer 32 by using welding wires for manufacturing the transition layers 33, wherein the thickness of one-side surfacing is 4-5 mm;
s244, after the overlaying of the transition layer 33 is finished, overlaying two layers of covering layers 34 on the transition layer 33 by using welding wires for manufacturing the covering layers 34, wherein the thickness of one-side overlaying is 4-5 mm; the build-up welding thickness of the whole workpiece is 12-15 mm.
Example 1
The high-performance movable cone and the fixed cone in the cone crusher mainly comprise a movable cone 1, a fixed cone 2, a wear-resistant layer 3 and a cavity 4, and are shown in figure 1.
(1) The base body 5 of the moving cone 1 and the fixed cone 2 is ZGMn18Cr2, and some Mo, V, Re and other alloy elements are added to refine crystal grains and improve impurity distribution; the carbide is uniformly solidified by a high-temperature strengthening water toughening treatment process, so that the wear resistance and impact toughness of the matrix 5 are ensured. The hardness of the matrix 5 of the processed movable cone 1 and the processed fixed cone 2 is HB220-260, and the impact value reaches 100-2。
(2) The high-hardness wear-resistant layer 3 is prepared at the severely worn part of the movable cone 1 and the fixed cone 2 and mainly comprises a bottom layer 31, a buffer layer 32, a transition layer 33 and a cover surface layer 34, as shown in figure 2. The thickness of the wear layer 3 of the weld overlay is set according to the allowable range of the working clearance of the cavity 4.
(3) The bottom layer 31 is mainly composed of low-carbon Mn-Cr alloy materials, and the specific chemical composition ranges are as follows: c: 0.02-0.05%; mn: 16-18%; si: 0.2-0.5%; cr: 2.5-4.0%; mo: 0.5-1.0%; the balance being Fe. Function of preparing the primer layer 31: the carbon element in the base body 5 is diluted by welding, so that the welded metal structure has the chemical components and mechanical properties of the high manganese steel, and the welding crack at the joint of the base body 5 and the bottom layer 31 is avoided by controlling the welding heat input amount, so that the subsequent welding buffer layer 32 is well paved.
(4) The buffer layer 32 is mainly composed of a low-carbon Cr-Mo-Nb alloy material, and the specific chemical composition range is as follows: c: 0.02-0.05%; mn: 1.0-1.5%; si: 0.3-0.8%; cr: 3-4.5%; mo: 1.5-2.5%; nb: 1.5-2.5%; the balance being Fe. Function of preparing the buffer layer 32: the overall toughness of the welded metal structure is adjusted by reducing the content of Mn, metallurgical bonding with the bottom layer 31 is ensured, and the dilution effect of alloy elements in the transition layer 33 is reduced by adding alloys such as Nb, Mo and the like.
(5) The transition layer 33 is mainly composed of high-carbon Cr-Mo-Nb-W alloy materials, and the specific chemical composition ranges are as follows: c: 0.6-0.9%; mn: 1.5-2.5%; si: 0.5-1.5%; cr: 6.5-8%; mo: 1.5-2.5%; nb: 1.5-2.5%; w: 1.0-3.0%; v: 0.5-1.0%; re: 0.1-0.3%; the balance being Fe. Effect of preparing the transition layer 33: the addition of the rare earth element Re is mainly used for reducing the number of inclusions in the cladding metal and also has the function of refining grains, so that the technological properties and the mechanical properties of the transition layer 33, such as crack resistance, toughness and the like, are improved. The welded metal layer has a welding hardness value of HRC53-55, and the hardness value can reach HRC56-58 after tempering treatment at 560 ℃.
(6) The facing layer 34 is mainly composed of a high-carbon Nb-W alloy material, and has the following specific chemical composition ranges: c: 1.0-1.5%; mn: 0.5-1.5%; si: 1.0-1.5%; cr: 4.0-6.0%; nb: 7.0-9.0%; w: 1.0-3.0%; v: 0.5-1.0%; re: 0.1-0.3%; the balance being Fe. Effect of preparing the facing layer 34: by adding C, Nb elements, a large amount of dispersed hard phases are formed in the cladding metal, the hardness reaches HRC58-62, and the wear resistance is further improved.
(7) 120 times of shearing experiments and drop hammer experiments prove that after high-speed impact, the wear-resistant layer 3 is well combined with the matrix 5, and the phenomena of stripping and falling are avoided.
The preparation of the welding wire was carried out according to the composition of the surfacing material shown in table 1, and the specific preparation method was as follows:
(1) after conversion according to the mixture ratio shown in table 1, selecting corresponding metal compound or alloy powder, and uniformly mixing in a powder mixer according to the proportion to obtain material powder;
(2) longitudinally shearing a cold-rolled steel strip with the thickness of 0.3-0.8 mm into a steel strip with the width of 8-10 mm by using a longitudinal shearing machine, rolling the steel strip on a wire rolling mill into a U-shaped section, filling mixed material powder into a U-shaped groove, and then rolling the steel strip into an O-shaped welding wire blank tube with the section of phi 3-5 mm; and drawing the welding wire blank tube to a finished welding wire with the size phi of 2.4-3.2 mm by using a multi-connected linear wire drawing machine, and then winding the welding wire blank tube into a standard disc-shaped welding wire.
TABLE 1 content (wt%) of each component in the build-up welding material
The specific surfacing process comprises the following steps:
(1) single-head monofilament submerged arc surfacing equipment is adopted.
(2) ZGMn18Cr2 is selected as the material of the matrix 5, the specification of a sample is phi 500 × 600mm, the surfacing surface is machined to expose the metallic luster, and the sample is subjected to flaw detection to ensure that the defects of cracks, slag inclusion and the like are avoided.
(3) The whole sample is preheated before welding, the preheating temperature is 150 ℃, the heating rate is 40-50 ℃/h, and the heat preservation time is 4-6 h.
(4) And (3) surfacing sequence: firstly, surfacing a bottom layer 31 on a substrate 5, wherein the thickness of one-side surfacing is about 2-2.5 mm; secondly, surfacing a buffer layer 32, wherein the thickness of single-side surfacing is about 2-2.5 mm; then overlaying two transition layers 33, wherein the thickness of one-side overlaying is about 4-5 mm; and finally, overlaying two cover surface layers 34, wherein the thickness of single-side overlaying is about 4-5mm, and the total overlaying thickness of the whole workpiece is 12-15 mm. Specific surfacing process parameters are shown in table 2.
TABLE 2 build-up welding Process parameters
(5) After overlaying, the steel plate is wrapped by heat-insulating cotton and slowly cooled to below 150 ℃ and then is tempered after welding.
(6) Postweld heat treatment: furnace temperature when entering the furnace: <150 ℃, rate of temperature rise: 30-50 ℃/h, heat preservation temperature: 200 +/-10 ℃, heat preservation time: 6-8 h, cooling speed: 25-40 ℃/h, tapping temperature: <100 ℃.
The design and implementation of the invention can effectively prolong the service life of the movable cone and the fixed cone in the cone crusher, and the invention is widely applied to mines and cement industry.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A high performance dynamic and static cone in a cone crusher, comprising: the device comprises a movable cone (1) and a fixed cone (2), wherein a cavity (4) is formed between the movable cone (1) and the fixed cone (2); move awl (1) with decide awl (2) and constitute by base member (5) and wearing layer (3), wearing layer (3) build-up welding is in on base member (5), be located respectively move the surface of awl (1) with the internal surface of deciding awl (2), distribute move awl (1) with the serious position of wearing and tearing on deciding awl (2).
2. The high performance dynamic and static cone in a cone crusher according to claim 1, characterized in that the material of the base body (5) is ZGMn18Cr2, and Mo, V and Re alloy elements are added simultaneously to refine the crystal grains and improve the impurity distribution; carbide is uniformly and solidly melted by a high-temperature strengthening water toughening treatment process, so that the wear resistance and impact toughness of the matrix (5) are ensured; the hardness of the matrix (5) after the high-temperature strengthening water toughening treatment is HB220-260, and the impact value is 100-120J/cm2。
3. The high performance dynamic and static cone in a cone crusher according to claim 1, characterized in that the wear layer (3) is composed of a base layer (31), a cushion layer (32), a transition layer (33) and a cover layer (34) which are laminated in this order, the base layer (31) being in contact with the base body (5); the thickness of the wear resistant layer (3) is set according to the working clearance allowance range of the cavity (4).
4. A high performance dynamic stationary cone in a cone crusher according to claim 3, characterized in that the primer layer (31) mainly consists of a low carbon Mn-Cr alloy material, which contains the following components in mass percent:
c: 0.02 to 0.05%, Mn: 16-18%, Si: 0.2-0.5%, Cr: 2.5-4.0%, Mo: 0.5-1.0% and the balance Fe.
5. The high performance dynamic stator in a cone crusher in accordance with claim 3, characterized in that the buffer layer (32) consists essentially of a low carbon Cr-Mo-Nb alloy material comprising the following components in mass percent:
c: 0.02 to 0.05%, Mn: 1.0-1.5%, Si: 0.3-0.8%, Cr: 3-4.5%, Mo: 1.5-2.5%, Nb: 1.5-2.5%; the balance being Fe.
6. The high performance dynamic and static cone in a cone crusher according to claim 3, characterized in that the transition layer (33) mainly consists of a high carbon Cr-Mo-Nb-W alloy material, which comprises the following components in mass percent:
c: 0.6-0.9%, Mn: 1.5-2.5%, Si: 0.5-1.5%, Cr: 6.5-8%, Mo: 1.5-2.5%, Nb: 1.5-2.5%, W: 1.0-3.0%, V: 0.5 to 1.0%, Re: 0.1-0.3%, and the balance Fe.
7. The cone crusher high performance dynamic and static cone according to claim 3, characterized in that the facing layer (34) consists essentially of a high carbon Nb-W alloy material, which comprises the following components in mass percent:
c: 1.0-1.5%, Mn: 0.5 to 1.5%, Si: 1.0-1.5%, Cr: 4.0-6.0%, Nb: 7.0-9.0%, W: 1.0-3.0%, V: 0.5 to 1.0%, Re: 0.1-0.3%, and the balance Fe.
8. A method for preparing a high performance moving and fixed cone in a cone crusher according to any of claims 1 to 7, comprising the steps of:
s1, preparing welding wires;
s11, preparing surfacing materials needed by the bottom layer (31), the buffer layer (32), the transition layer (33) and the cover surface layer (34) respectively;
s12, converting the component elements in each surfacing material according to the proportion, and selecting corresponding metal compounds or alloy powder to be uniformly mixed in a powder mixer according to the proportion to obtain powder of each material;
s13, obtaining welding wires required for manufacturing the bottom layer (31), the buffer layer (32), the transition layer (33) and the cover layer (34) by utilizing the powder of each material;
s2, overlaying a wear-resistant layer (3) on the base body (5) through an overlaying process;
s21, selecting surfacing equipment;
s22, selecting ZGMn18Cr2 as a sample material of the substrate (5), wherein the specification of the sample is phi 500 × 600mm or phi 300 × 600mm, carrying out mechanical processing on the surfacing surface of the substrate (5) to expose metallic luster, and carrying out flaw detection on the sample to ensure that no crack or slag inclusion defect exists;
s23, preheating the whole sample before welding, wherein the preheating temperature is 150 ℃, the heating rate is 40-50 ℃/h, and the heat preservation time is 4-6 h;
s24, carrying out surfacing welding by using welding wires of the priming layer (31), the buffer layer (32), the transition layer (33) and the cover surface layer (34);
s25, wrapping the steel plate with heat preservation cotton after surfacing, slowly cooling the steel plate to below 150 ℃, and then performing tempering treatment after welding;
s26, carrying out postweld heat treatment, wherein the postweld heat treatment conditions are as follows:
furnace temperature when entering the furnace: <150 ℃, rate of temperature rise: 30-50 ℃/h, heat preservation temperature: 200 +/-10 ℃, heat preservation time: 6-8 h, cooling speed: 25-40 ℃/h, tapping temperature: <100 ℃.
9. The preparation method of the welding wire as claimed in claim 8, wherein in the step S13, the preparation method of the welding wire specifically comprises the following steps:
s131, selecting four groups of cold-rolled steel strips with the thickness of 0.3-0.8 mm, and longitudinally shearing the width of each cold-rolled steel strip into 8-10 mm by using a slitting machine;
s132, rolling each cut cold-rolled steel strip into a U-shaped section on a wire rolling mill, and filling each mixed material powder into each U-shaped groove respectively;
s133, rolling each steel strip into a welding wire blank tube with an O-shaped uniform section, wherein the diameter of the O-shaped O-;
s134, drawing each welding wire blank tube to a finished welding wire by using a multi-connected linear wire drawing machine, wherein the diameter of the finished welding wire is phi 2.4-3.2 mm, and then respectively winding the finished welding wire into standard disc-shaped welding wires to obtain the welding wires of the bottom layer (31), the buffer layer (32), the transition layer (33) and the cover surface layer (34).
10. The production method according to claim 8, wherein in step S24, the build-up welding sequence is:
s241, using a welding wire for manufacturing the bottom layer (31), overlaying a layer of the bottom layer (31) on the substrate (5), wherein the thickness of one-side overlaying is 2-2.5 mm;
s242, after surfacing of the bottom layer (31), surfacing a buffer layer (32) on the bottom layer (31) by using a welding wire for manufacturing the buffer layer (32), wherein the thickness of one-side surfacing is 2-2.5 mm;
s243, after surfacing of the buffer layer (32), surfacing two transition layers (33) on the buffer layer (32) by using a welding wire for manufacturing the transition layers (33), wherein the thickness of one-side surfacing is 4-5 mm;
s244, after surfacing of the transition layer (33) is finished, using welding wires for manufacturing the covering surface layer (34), surfacing two covering surface layers (34) on the transition layer (33), wherein the thickness of one-side surfacing is 4-5 mm; the build-up welding thickness of the whole workpiece is 12-15 mm.
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