CN115948738A - Application of laser cladding welding wire in hydraulic support stand column - Google Patents
Application of laser cladding welding wire in hydraulic support stand column Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention provides application of a laser cladding welding wire in a hydraulic support upright post, which is mainly used for preparing a coating with corrosion resistance and high hardness requirements on the surface of a part. FeTi30 is added into the used cladding welding wire, and the addition amount of the FeTi30 is related to carbon powder, so that the C powder and the FeTi30 generate a TiC reinforced phase in situ, and the phenomenon that the C powder is brought into the TiC reinforced phase too much to form splashing is avoided. By optimizing the content of the added Si and B elements which are main elements for slagging, the content of the Si and B elements is reduced and the slag amount is reduced on the premise of keeping the fluidity of a molten pool. The flux-cored wire is optimized to be a powdery mixture inside, the components of the flux-cored wire are controllable, the adjustment and control of the components can be carried out according to the requirement of a cladding layer, and simultaneously, the powdery material can be quickly melted in the laser cladding process due to the powdery material, the fluidity of a molten pool formed in the laser cladding process is good, the structure uniformity of the formed cladding layer is good, the splashing in the cladding process is less, the smoke dust is less, and the amount of generated slag is less.
Description
Technical Field
The invention belongs to the technical field of metal materials, and particularly relates to an application of a laser cladding welding wire in a hydraulic support upright post.
Background
At present, common surface treatment processes of the hydraulic support oil cylinder are divided into electroplating and laser cladding. Aiming at geological conditions in a mine environment, the electroplating process has good adaptability, but has great environmental pollution, and the quality, the performance, the overhaul period, the maintenance cost and the like of a plating layer have many disadvantages. The laser cladding process belongs to an advanced environment-friendly additive manufacturing technology, and can better meet the use requirement of long service life of the fully-mechanized coal mining support.
The laser cladding of the hydraulic support upright column usually adopts powder as a consumable material, and has low utilization rate, high cost and lack of competitiveness. The wire laser cladding technology is applied to the coal mine hydraulic support column, and the wire cladding layer meeting the service requirement needs to have enough corrosion resistance to resist the complex working environment of a coal mine excavation face. In addition to corrosion, it is also common for hydraulic bracket columns to fail by wear during use, so the wire cladding should also maintain a high hardness to resist wear.
When a cladding layer is prepared, the laser cladding of wire materials is different from the laser cladding of powder, the influence of slag and splashing on cladding needs to be considered, materials with high slag content and large splashing form slag inclusion to directly influence multiple overlapping and secondary cladding of the cladding layer, the defect rate is high, and the prepared cladding layer is influenced. Therefore, whether the wire can stably obtain a cladding layer with high hardness, corrosion resistance and few defects under the action of a laser heat source or not during wire laser cladding is a key point for promoting the large-scale application of the wire laser cladding technology.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an application of a laser cladding welding wire in a hydraulic support stand column so as to solve the problem that the hydraulic support stand column in the prior art needs to stably obtain a cladding layer with high hardness, corrosion resistance and few defects.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
the application of the laser cladding welding wire in the hydraulic support upright post is characterized in that the laser cladding welding wire contains FeTi30-A;
preparing a cladding layer on the surface of the hydraulic support stand column by the laser cladding welding wire through a wire laser cladding technology at laser power of 3000w, a cladding speed of 22mm/s and a wire feeding speed of 60 mm/s; the cladding layer comprises the following components in percentage by mass: c:0.20 to 0.35 percent; si:0.30-0.50%; mn:0.60-1.20%; cr:18.80-20.60%; ni:1.40-2.40%; mo:0.20-0.80%; al:0.35-0.58%; ti:1.10-2.00%; b:0.20 to 0.70 percent of Fe, and the balance of Fe; the laser cladding layer contains TiC.
The invention is further improved in that:
preferably, the preparation process of the laser cladding welding wire comprises the following steps: placing the mixed metal in a welding skin, and turning over the welding skin to enable the welding skin to wrap the mixed metal powder; and drawing the welding skin wrapped with the mixed metal powder to a target diameter to obtain the welding wire.
Preferably, the flux core is a mixed metal powder; the components of the flux core change along with the change of the quality of the welding skin;
preferably, when the welding skin is a 430 stainless steel strip, the flux core comprises the following components in percentage by mass: c:0.70 to 1.20 percent; si:0.5-0.9%; b:1.50 to 2.80 percent; mn:2.00-4.00%; cr:26.00 to 31.00 percent; ni:5.00 to 8.00 percent; mo:1.00-3.00%; feTi30-A:20 to 30 percent; the balance being Fe.
Preferably, when the welding skin is a 410 stainless steel strip, the flux core comprises the following components in percentage by mass: c:0.70-1.20%; si:0.36-0.76%; b:1.50 to 2.80 percent; mn:2.00-4.00%; cr:36.50-41.50%; ni:4.80-7.70%; mo:1.00-3.00%; feTi30-A:20 to 30 percent; the balance being Fe.
And mixing the mixed metal powder, and then carrying out vacuum drying treatment.
The filling rate of the powder in the flux-cored wire is 30-33 wt.%.
The diameter of the flux-cored wire is 1.0-1.2mm.
The hardness of the cladding layer is 53-55HRC, and the neutral salt spray corrosion resistance time is more than 300 hours.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses an application of a laser cladding welding wire in a hydraulic support upright post, in the application process, feTi30 is added into the welding wire, and the addition amount of the FeTi30 is related to carbon powder, so that C powder and the FeTi30 generate a TiC reinforced phase in situ, and the phenomenon that excessive nonmetal is brought in to form splash is avoided. By optimizing the content of the added Si and B elements which are main elements for slagging, the content of the Si and B elements is reduced and the slag amount is reduced on the premise of keeping the fluidity of a molten pool. The flux-cored wire is optimized to be a powdery mixture inside, the components of the flux-cored wire are controllable, the adjustment and control of the components can be carried out according to the requirement of a cladding layer, and simultaneously, the powdery material can be quickly melted in the laser cladding process due to the powdery material, the fluidity of a molten pool formed in the laser cladding process is good, the structure uniformity of the formed cladding layer is good, the splashing in the cladding process is less, the smoke dust is less, and the amount of generated slag is less. Compared with the traditional addition method, the TiC reinforcement in the cladding layer is small in size, pollution-free in surface and high in interface bonding strength, and meanwhile, along with the precipitation of partial TiC, excessive chromium carbide is prevented from being precipitated along the austenite crystal boundary, so that the intergranular corrosion phenomenon is effectively prevented, and the overall performance of the cladding layer is greatly improved.
Furthermore, the flux-cored wire is designed by taking a martensite structure as a laser cladding layer matrix structure, and by adding an endogenous (Nb, ti) C hard phase of Ti and Nb alloy elements, the preparation of a high-hardness wear-resistant high-performance wire laser cladding layer is realized, and the requirement of continuous service of a hydraulic support is met; the reinforcing phase selected by the invention has good wettability with the matrix, and the problem of cracking of the reinforcing phase in the cladding process is avoided.
Furthermore, the cladding layer is essentially an Fe-based cladding layer, is mainly formed by performing laser cladding on the surface of a hydraulic support upright (made of carbon steel), and the main elements of the two are Fe, so that the thermal expansion coefficients of the two are similar, and the finally formed cladding layer has strong cracking resistance and peeling resistance.
Furthermore, the flux-cored wire is used for preparing a corrosion-resistant and high-hardness laser cladding layer by laser cladding, the formula of the powder is easy to obtain, the production efficiency of the wire is high, the cost is low, and the application prospect is wide. The method adopts the flux-cored wire preparation technology, the final components of the prepared flux-cored wire are realized through the steel belt and the powder, and compared with the traditional solid wire for producing steel products needing to be smelted, the method has the advantages of short period, quick effect and low cost. The alloy element types of the flux-cored wire can be rapidly adjusted according to requirements, and the wire drawing process is simple. The wire diameter of the developed welding wire is 1.0-1.2mm, and the welding wire can also be used for MIG and TIG welding processes and has a wide application range.
Furthermore, the powder formula provided by the invention is matched with a 430 stainless steel strip or a 410 stainless steel strip, and C and FeTi30 powder are added to be used as a deoxidizer and a degasifier in the laser cladding process, so that the in-situ reaction is realized to generate a TiC reinforced phase, and the high hardness index, the corrosion resistance and the stability of a cladding layer are realized. And the high-hardness cladding layer is ensured not to crack by matching with a certain Ni content.
Further, the cladding layer prepared by the method finally forms the cladding layer with higher corrosion resistance and higher hardness as a coating, and the coating is a martensitic stainless steel type material. The wire material is used for the functional coating prepared by wire material laser cladding, the surface hardness can reach 53-55HRC (the average value is more than or equal to 54 HRC), the material has excellent neutral environment corrosion resistance, and the corrosion rating of the surface of the material after being corroded for 300 hours can reach the highest level of more than 9 according to the rating of a test piece and a test piece after being corroded by metal and other inorganic covering layers on a GBT6461 metal matrix under the condition of GBT10125 artificial atmosphere corrosion test salt fog test. The method has important engineering practical value for reducing the repair cost of the hydraulic support oil cylinder and promoting the application of the green laser surface modification technology in the coal mine industry.
Drawings
Fig. 1 shows the microstructure of the cladding layer of the flux-cored wire prepared in example 2 of the present invention after laser cladding.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples:
the embodiment of the invention discloses application of a laser cladding welding wire in a hydraulic support upright post, which comprises the following two steps:
step 1, preparing a flux-cored wire; the flux-cored wire is a high-hardness, less-slag and less-splashing endogenous ceramic reinforcement phase laser cladding flux-cored wire, and comprises a flux core and a welding skin, wherein the flux core is arranged in the welding skin, the flux core is wrapped by the welding skin, and the welding skin is a stainless steel strip.
The stainless steel band can be adjusted according to actual conditions, for example, a 430 stainless steel band or a 410 stainless steel band is used, and in order to generate the target cladding layer content, the flux core composition is adjusted correspondingly with the adjustment of the type of the stainless steel band. The flux-cored wire has the powder filling rate of 30-33 wt.%.
Specifically, when the welding skin is a 430 stainless steel strip, the medicinal powder is composed of mixed metal powder, and the mixed metal powder is composed of the following raw materials in percentage by mass: c:0.70-1.20%; si:0.50 to 0.90 percent; b:1.50-2.80%; mn:2.00-4.00%; cr:26.00 to 31.00 percent; ni:5.00 to 8.00 percent; mo:1.00-3.00%; feTi30-A:20 to 30 percent; the balance being Fe.
Specifically, when the welding skin is a 410 stainless steel strip, the medicinal powder is composed of mixed metal powder, and the mixed metal powder is composed of the following raw materials in percentage by mass: c:0.70-1.20%; si:0.36-0.76%; b:1.50 to 2.80 percent; mn:2.00-4.00%; cr:36.50-41.50%; ni:4.80-7.70%; mo:1.00-3.00%; feTi30-A:20 to 30 percent; the balance being Fe.
Specifically, when the flux core is prepared, metal powder is weighed according to the target flux core composition, the weighed metal powder is mixed through a mixer or other mixing modes and then dried in a vacuum furnace to obtain mixed and dried metal powder, the dried metal powder is placed in an unfolded welding skin, the metal powder is wrapped by the welding skin, and a welding wire is formed through drawing, wherein the diameter of the welding wire is phi 1.0-1.2mm.
And 2, melting the welding wire on the surface of the hydraulic support through laser cladding, and forming a laser cladding layer on the surface of the hydraulic support, wherein the parameters of the laser cladding process are laser power 3000w, the cladding speed is 22mm/s, and the wire feeding speed is 60mm/s. The cladding layer is a coating and has corrosion resistance and high hardness, the prepared coating belongs to a martensitic stainless steel type material, alloy elements for improving the toughness and slag-making elements such as optimized Si and B are added, so that the wire has good process performance in the cladding process, less smoke dust, less slag and less splashing, the cladding layer has high hardness and plasticity and toughness while having good corrosion resistance, and the metal wire can be prepared in a drawing mode by adopting a preparation technology of the flux-cored wire.
Specifically, the composition of the cladding layer is, in mass fraction, C:0.20-0.35%; si:0.30-0.50%; mn:0.60-1.20%; cr:18.80-20.60%; ni:1.40-2.40%; mo:0.20-0.80%; al:0.35-0.58%; ti:1.10-2.00%; b:0.30 to 0.70 percent.
The reasonable blending of elements ensures that the cladding layer has high hardness and corrosion resistance, the process performance achieves less slag and less splashing, and the slag inclusion defect in the cladding process is reduced, and the main alloy elements in the metal wire material formula have the following functions:
chromium (Cr): cr can improve the strength of alpha-Fe based on solid solution strengthening effect. The effect of adding Cr is to ensure that the neutral salt spray corrosion (NSS) resistance of the cladding layer reaches more than 300 hours mainly by virtue of excellent corrosion resistance. In the invention, a 430 stainless steel strip and a 30-33wt.% filling rate are matched, and 26.00-30.00% of Cr element is added into the powder. The powder is mixed with 410 stainless steel band and 30-33wt.% of filling rate, and 36.50-41.50% of Cr element is added into the powder.
Molybdenum (Mo): mo, like Cr, has the functions of solid solution strengthening and corrosion resistance improvement. However, mo has a stronger solid-solution strengthening effect than Cr and a lower corrosion resistance effect than Cr. In the invention, the strength of the cladding layer is mainly ensured by the endogenous hard phase, so that the element which can obviously improve the strength of the cladding layer is reduced by Mo in order to avoid the cracking of the cladding layer. In addition, the reduction of Mo can also reduce the production cost of the material. According to the invention, a 430 stainless steel strip or a 410 stainless steel strip is matched with a filling rate of 30-33wt.%, and 1.00-3.00% of Mo element is added into the powder.
FeTi (30): feTi30 belongs to ferrotitanium and is used as a deoxidizer and a degasifier in the cladding process. The deoxidizing capacity of the titanium element in the FeTi30 is greatly higher than that of silicon and manganese, the segregation of a cladding layer can be reduced, the strength, the corrosion resistance and the stability of the cladding layer are improved, and meanwhile, the titanium element in the FeTi30 reacts with C to generate a TiC brittle phase in situ. The TiC brittle phase has high hardness, and if the addition amount of FeTi30 is large, a large amount of TiC phase is generated, and the cladding layer is easy to crack. In addition, the generation of TiC and the content of added C powder should be consistent, so the invention combines 430 stainless steel band or 410 stainless steel band and 30-33wt.% filling rate, and 20.0-30.0% FeTi30 powder is added into the powder.
Nickel (Ni): the Ni element also plays a role in corrosion resistance and solid solution strengthening. The Ni is added to the invention mainly to improve the plasticity and toughness of the alloy and avoid the cracking of a cladding layer. In the invention, a 430 stainless steel strip and a filling rate of 30-33wt.% are matched, and 5.00-8.00% of Ni element is added into the medicinal powder. The powder is mixed with 410 stainless steel band and 30-33wt.% of filling rate, and 4.80-7.70% of Ni element is added into the powder.
Silicon (Si) and manganese (Mn): the main functions of Si and Mn in the present invention are combined deoxidation, which reduces the oxygen content in the cladding layer and prevents the generation of pores. Mn also has a certain effect on improving the strength of the cladding layer. According to the invention, a 430 stainless steel strip and a 30-33wt.% filling rate are matched, and 1.00-1.50% of Si element and 2.00-4.00% of Mn element are added into the powder. According to the invention, a 410 stainless steel strip and a 30-33wt.% filling rate are matched, and 0.36-0.76% of Si element and 2.00-4.00% of Mn element are added into the powder.
Carbon (C): c is an indispensable element for forming the martensite structure. In the invention, the element C is mainly provided by the 430 stainless steel strip and the added C powder, and the C powder and FeTi 30 And generating a TiC reinforcing phase in situ. In the invention, the 430 stainless steel strip or the 410 stainless steel strip is matched with the packing rate of 30-33wt.%, and 0.70-1.20% of C element is added into the medicinal powder.
Preferably, the metal flux-cored wire is a martensitic stainless steel metal wire material with the diameter of phi 1.0 mm-phi 1.2mm.
The laser cladding wire material is used for carrying out laser cladding treatment on the surface of the hydraulic support stand column.
Further, the high-hardness, less-slag and less-spatter endogenous ceramic reinforced phase laser cladding flux-cored wire is used for carrying out laser cladding treatment on the surfaces of relevant parts in a hydraulic support, the hardness of a surface laser cladding coating reaches 53-55HRC (the average value is not less than 54 HRC), and the neutral salt spray corrosion (NSS) resistance of the surface laser cladding coating reaches more than 300 hours.
The following is further illustrated with reference to specific examples:
example 1
Step 1, weighing metal powder according to the following components in parts by mass: c,0.7%; si,0.73%; mn,4.0%; 26% of Cr; 5.0 percent of Ni; 30% of Mo; 30, 20% of FeTi; b,1.5%; and the balance of iron, placing the weighed mixed metal powder into a 430 stainless steel band, wrapping the mixed metal powder by the 430 stainless steel band, wherein the filling rate of the powder is 30wt.%, and drawing to prepare the flux-cored wire.
Step 2, preparing a multilayer cladding layer (no less than 5 layers) on the surface of the hydraulic support upright post by laser cladding of the flux-cored wire prepared in the step 1, wherein the Rockwell Hardness (HRC) of different parts of the material is measured to be 53.2, 54.9, 55.2, 55.4 and 54.3 respectively, and the average value is 54.56; the prepared cladding layer comprises the following components: c,0.21%; si,0.43%; 1.2 percent of Mn; 18.8 percent of Cr; 1.4 percent of Ni; 0.8 percent of Mo; b,0.31%; 1.1% of Ti, 0.35% of Al and the balance of Fe. According to the inspection method for welding anti-spattering agent, the spattering residual rate in the cladding process is 0.84%.
Example 2:
step 1, weighing metal powder according to the following components in parts by mass: c,1.2%; 0.9% of Si; 3.0 percent of Mn; 31% of Cr; 8.0 percent of Ni; 2% of Mo; 30% of FeTi; b,2.8%; and the balance of iron, placing the weighed mixed metal powder into a 430 stainless steel band, wrapping the mixed metal powder by the 430 stainless steel band, wherein the filling rate of the powder is 33wt.%, and drawing to prepare the flux-cored wire.
Step 2, preparing a multilayer cladding layer (no less than 5 layers) on the surface of the hydraulic support upright post by laser cladding the flux-cored wire prepared in the step 1, wherein the Rockwell Hardness (HRC) of different parts of the material is measured to be 55.2, 54.9, 54.8, 55.0 and 53.7 respectively, and the average value is 54.7; the prepared cladding layer comprises the following components: c,0.35%; 0.5 percent of Si; 0.84 percent of Mn; 20.57 percent of Cr; 2.38 percent of Ni; mo,0.52%; b,0.7; 2.0 percent of Ti, 0.58 percent of Al and the balance of Fe. According to the inspection method for welding anti-spattering agent, the spattering residual rate in the cladding process is 0.89%.
The laser cladding layer prepared by example 2 had a structure as shown in fig. 1: the structure of the cladding layer is mainly martensite, the crystal grains are fine and uniform, the carbides are uniformly distributed, and the defects of cracks, air holes and the like are not generated.
Example 3:
step 1, weighing metal powder according to the following components in parts by mass: c,1.0%; 0.5 percent of Si; 2.0 percent of Mn; 28.5 percent of Cr; 7.0 percent of Ni; 1% of Mo; 30, 25% of FeTi; b,2.1%; and the balance of iron, putting the weighed mixed metal powder into a 430 stainless steel band, wrapping the mixed metal powder by the 430 stainless steel band, wherein the filling rate of the powder is 31wt.%, and drawing to prepare the flux-cored wire.
Step 2, preparing a multilayer cladding layer (not less than 5 layers) on the surface of the hydraulic support upright post by laser cladding of the flux-cored wire prepared in the step 1, wherein the Rockwell Hardness (HRC) of different parts of the material is measured to be 53.4, 57.1, 56.9, 55.1 and 55.1 respectively, and the average value is 55.5; the prepared cladding layer comprises the following components: c,0.28%; 0.3 percent of Si; mn,06%; 19.3 percent of Cr; 2.4 percent of Ni; 0.2 percent of Mo; b,0.52; 1.8 percent of Ti, 0.46 percent of Al and the balance of Fe. According to the inspection method for welding anti-spattering agent, the spattering residual rate in the cladding process is 0.78%.
Example 4:
step 1, weighing metal powder according to the following components in parts by mass: c,0.7%; si,0.36%; 2.0 percent of Mn; 38.4 percent of Cr; 4.8 percent of Ni; 1% of Mo; 30, 20% of FeTi; b,2.8%; and the balance of iron, putting the weighed mixed metal powder into a 430 stainless steel band, wrapping the mixed metal powder by the 430 stainless steel band, wherein the filling rate of the powder is 30wt.%, and drawing to prepare the flux-cored wire.
Step 2, preparing a multilayer cladding layer (not less than 5 layers) on the surface of the hydraulic support upright post by laser cladding of the flux-cored wire prepared in the step 1, wherein the Rockwell Hardness (HRC) of different parts of the material is measured to be 52.8, 56.4, 55.3, 55.7 and 54.5 respectively, and the average value is 54.95; the prepared cladding layer comprises the following components: c,0.2%; 0.30% of Si; 0.6 percent of Mn; 19.5 percent of Cr; 1.43 percent of Ni; mo,0.24%; 0.7 percent of B, 1.1 percent of Ti, 0.35 percent of Al and the balance of Fe. According to the inspection method for welding anti-spattering agent, the spattering residual rate in the cladding process is 0.91%.
Example 5:
step 1, weighing metal powder according to the following components in parts by mass: c,1.2%; si,0.58%; mn,4.0%; 36.5 percent of Cr; 7.7 percent of Ni; 3% of Mo; 30, 20% of FeTi; b,2.1%; and the balance of iron, placing the weighed mixed metal powder into a 430 stainless steel band, wrapping the mixed metal powder by the 430 stainless steel band, wherein the filling rate of the powder is 33wt.%, and drawing to prepare the flux-cored wire.
Step 2, preparing a multilayer cladding layer (not less than 5 layers) on the surface of the hydraulic support upright post by laser cladding of the flux-cored wire prepared in the step 1, wherein the Rockwell Hardness (HRC) of different parts of the material is respectively 54.9, 55.7, 55.1, 56.3 and 54.5 through measurement, and the average value is 55.3; the prepared cladding layer comprises the following components: c,0.35%; si,0.43%; 1.2 percent of Mn; 18.9 percent of Cr; 2.4 percent of Ni; mo,0.78%; b,0.48%; 2.0 percent of Ti, 0.58 percent of Al and the balance of Fe. According to the inspection method for welding anti-spattering agent, the spattering residual rate in the cladding process is 0.83%.
Example 6:
step 1, weighing metal powder according to the following components in parts by mass: c,0.86%; si,0.76%; 3.2 percent of Mn; 41.5 percent of Cr; 5.8 percent of Ni; 2.1 percent of Mo; 30, 26% of FeTi; b,1.5%; and the balance of iron, putting the weighed mixed metal powder into a 430 stainless steel band, wrapping the mixed metal powder by the 430 stainless steel band, wherein the filling rate of the powder is 31wt.%, and drawing to prepare the flux-cored wire.
Step 2, preparing a multilayer cladding layer (no less than 5 layers) on the surface of the hydraulic support upright post by laser cladding of the flux-cored wire prepared in the step 1, wherein the Rockwell Hardness (HRC) of different parts of the material is respectively 54.8, 53.3, 54.1, 55.3 and 54.5 through measurement, and the average value is 54.6; the prepared cladding layer comprises the following components: c,0.29%; 0.5 percent of Si; 0.93 percent of Mn; 20.6 percent of Cr; 1.92 percent of Ni; mo,0.56%; b,0.30 percent; 1.86 percent of Ti, 0.48 percent of Al and the balance of Fe. According to the inspection method for welding spatter-proof agent, the spatter remaining rate in the cladding process is 0.86%.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. The application of the laser cladding welding wire in the hydraulic support upright post is characterized in that the laser cladding welding wire contains FeTi30-A;
the laser cladding welding wire is used for preparing a cladding layer on the surface of the hydraulic support upright post by adopting a wire laser cladding technology and adopting laser power of 3000w, a cladding speed of 22mm/s and a wire feeding speed of 60 mm/s; the cladding layer comprises the following components in percentage by mass: c:0.20-0.35%; si:0.30-0.50%; mn:0.60-1.20%; cr:18.80-20.60%; ni:1.40-2.40%; mo:0.20-0.80%; al:0.35-0.58%; ti:1.10-2.00%; b:0.20 to 0.70 percent of Fe, and the balance of Fe; the laser cladding layer contains TiC.
2. The application of the laser cladding welding wire in the hydraulic support upright post is characterized in that the preparation process of the laser cladding welding wire is as follows: placing the mixed metal in a welding skin, and turning over the welding skin to enable the welding skin to wrap the mixed metal powder; and drawing the welding skin wrapped with the mixed metal powder to a target diameter to obtain the welding wire.
3. The use of the laser-clad welding wire for hydraulic support columns according to claim 2, wherein the flux core is mixed metal powder; the composition of the flux core changes as the quality of the weld skin changes.
4. The application of the laser cladding welding wire in the hydraulic support stand column as claimed in claim 3, wherein when the weld skin is a 430 stainless steel band, the composition of the flux core is as follows by mass fraction: c:0.70-1.20%; si:0.5-0.9%; b:1.50 to 2.80 percent; mn:2.00-4.00%; cr:26.00 to 31.00 percent; ni:5.00 to 8.00 percent; mo:1.00-3.00%; feTi30-A:20 to 30 percent; the balance being Fe.
5. The application of the laser cladding welding wire in the hydraulic support stand column as claimed in claim 3, wherein when the weld skin is a 410 stainless steel band, the composition of the flux core is as follows by mass fraction: c:0.70 to 1.20 percent; si:0.36-0.76%; b:1.50-2.80%; mn:2.00-4.00%; cr:36.50-41.50%; ni:4.80-7.70%; mo:1.00-3.00%; feTi30-A:20 to 30 percent; the balance being Fe.
6. The use of the laser-clad welding wire for hydraulic support columns according to claim 2, wherein the mixed metal powder is mixed and then subjected to vacuum drying.
7. The use of the laser-clad welding wire in hydraulic support columns according to claim 2, wherein the powder filling rate in the flux-cored welding wire is 30-33 wt.%.
8. The use of the laser-clad welding wire in hydraulic support columns according to claim 2, wherein the diameter of the flux-cored welding wire is 1.0-1.2mm.
9. The use of the laser-clad welding wire in hydraulic support columns according to claim 1, wherein the hardness of the cladding layer is 53-55HRC, and the neutral salt spray corrosion resistance time is more than 300 hours.
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