CN115418571A - Laser cladding alloy powder for improving abrasion resistance and corrosion resistance of banknote cutter blade - Google Patents
Laser cladding alloy powder for improving abrasion resistance and corrosion resistance of banknote cutter blade Download PDFInfo
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- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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Abstract
The invention relates to iron-based alloy powder for laser cladding, in particular to laser cladding alloy powder for improving the wear resistance and corrosion resistance of a banknote cutter blade, and solves the technical problems that the banknote cutter blade is easy to seriously deform during laser cladding and crack easily caused by multiple-layer cladding, so that the service life of the banknote cutter blade is short, and the high hardness, wear resistance and corrosion resistance of the banknote cutter blade are difficult to realize. The laser cladding alloy powder for improving the abrasion resistance and corrosion resistance of the cutting edge of the banknote cutter comprises the following components in percentage by weight: c is between 0.26 and 0.29 percent by weight; cr is between 17.0 and 17.3 weight percent; ni is more than or equal to 0.18wt% and less than or equal to 0.22wt%; mn is more than or equal to 0.4 weight percent and less than or equal to 0.5 weight percent; mo is more than or equal to 0.18 weight percent and less than or equal to 0.22 weight percent; nb is more than or equal to 0.08wt% and less than or equal to 0.12wt%; v is more than or equal to 0.23 weight percent and less than or equal to 0.27 weight percent; b is more than or equal to 1.3 weight percent and less than or equal to 1.4 weight percent; si is more than or equal to 0.7wt% and less than or equal to 0.8wt%, and the balance is Fe. Through laser cladding, the high hardness, the abrasion resistance and the corrosion resistance of the banknote cutter blade are realized.
Description
Technical Field
The invention relates to iron-based alloy powder for laser cladding, in particular to laser cladding alloy powder for improving the wear resistance and corrosion resistance of a banknote cutter blade.
Background
The existing paper money knife made of A3 steel has the defects that the knife edge is scrapped due to abrasion, air oxidation and corrosion in the using process; therefore, one treatment method in the industry is to reinforce the surface of the cutting edge of the banknote cutter in an arc surfacing repair mode; however, the thickness of the cutting edge of the paper money knife is only 5mm, so after arc surfacing is strengthened, the bending deformation and the size out-of-tolerance of the paper money knife workpiece are very serious. The other treatment method is to strengthen the cutting edge of the paper money cutter by using a surface spraying method, but the spraying layer is easy to peel off when the cutting edge of the paper money cutter works due to poor binding force, so that the service life of the paper money cutter is seriously influenced.
The laser cladding technology is more and more popular in the field of banknote cutter strengthening due to the advantages of small thermal deformation and metallurgical bonding. However, there is a pain point in the industry at present, when the high-hardness alloy powder (60-63 HRC) is clad on the edge of the banknote cutter, the cladding layer is prone to cracking, and when the low-hardness wear-resistant alloy powder is clad, the service life of the alloy powder is short.
Chinese patent publication No. CN103993309A discloses a method for laser remanufacturing of a roll; in this patent, the hardness of the cladding layer is as high as 69HRC; first, the hardness range disclosed in this patent is not suitable for the hardness range of the bill knife, which should have both a certain hardness and a certain toughness. Secondly, the alloy powder needs to preheat the base material at 300-450 ℃ during cladding, and the thermal deformation of the banknote cutter blade with the thickness of only 5mm cannot be controlled. Thirdly, the combination of the carbon element content of 0.63-0.66% and the chromium element content of 12.35-14.65% cannot ensure the corrosion resistance of the edge of the banknote cutter. Chinese patent publication No. CN103993308A discloses a method for remanufacturing a roll shaft type component by laser cladding, and alloy powder used in the method is a nickel element-based alloy, which is expensive and has poorer fusibility with iron-based substrate A3 steel than iron-based alloy powder, and is more prone to cracking. Chinese patent publication No. CN112795916A discloses laser cladding alloy powder for a roller step pad and a laser cladding method, the hardness of the cover surface layer of the alloy powder used in the patent is 587HV at the highest, the hardness of the base layer is only 370HV, the design of the step cladding layer does not meet the hardness requirement of a paper money knife, and the coating design of "soft base layer + hard surface layer" is easy to cause cutting accidents.
In summary, the cutting edge of the existing banknote cutter is prone to severe deformation during laser cladding, and cracks are prone to occur during multiple layers of cladding, so that the service life of the cutting edge of the banknote cutter is short, and the requirements of high hardness, wear resistance and corrosion resistance of the cutting edge of the banknote cutter are difficult to achieve.
Disclosure of Invention
The invention aims to solve the technical problems that the service life of the cutting edge of the banknote cutter is short and the high hardness, wear resistance and corrosion resistance of the cutting edge of the banknote cutter are difficult to realize due to the fact that the cutting edge of the banknote cutter is easy to seriously deform during laser cladding and crack during multi-layer cladding, and provides laser cladding alloy powder for improving the wear resistance and corrosion resistance of the cutting edge of the banknote cutter.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the laser cladding alloy powder for improving the abrasion resistance and corrosion resistance of the cutting edge of the banknote cutter is characterized by comprising the following components in percentage by weight:
c is more than or equal to 0.26 weight percent and less than or equal to 0.29 weight percent; cr is between 17.0 and 17.3 weight percent; ni is more than or equal to 0.18wt% and less than or equal to 0.22wt%; mn is more than or equal to 0.4 weight percent and less than or equal to 0.5 weight percent; mo is between 0.18 and 0.22 weight percent; nb is more than or equal to 0.08wt% and less than or equal to 0.12wt%; v is more than or equal to 0.23 weight percent and less than or equal to 0.27 weight percent; b is more than or equal to 1.3 weight percent and less than or equal to 1.4 weight percent; si is more than or equal to 0.7wt% and less than or equal to 0.8wt%, and the balance is Fe.
Further, the components comprise the following components in percentage by weight:
c:0.26wt%; cr:17.0wt%; ni:0.18wt%; mn:0.4wt%; mo:0.18wt%; nb:0.08wt%; v:0.23wt%; b:1.3wt%; si:0.7wt%, the balance being Fe.
Further, the components comprise by weight percent:
c:0.29wt%; cr:17.3wt%; ni:0.22wt%; mn:0.5wt%; mo:0.22wt%; nb:0.12wt%; v:0.27wt%; b:1.4wt%; si:0.8wt%, the balance being Fe.
Further, the components comprise the following components in percentage by weight:
c:0.275wt%; cr:17.15wt%; ni:0.20wt%; mn:0.45wt%; mo:0.20wt%; nb:0.10wt%; v:0.25wt%; b:1.35wt%; si:0.75wt%; the balance being Fe.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
1. the invention selects the combination of four elements of C, B, si and Cr, and replaces carbon element with boron element, thereby reducing the content of carbon element without reducing the hardness. The boron element can also reduce the melting point of the alloy powder and prevent the risk that the cladding layer on the edge of the banknote cutter is overheated to cause the cracking of the cladding layer. According to the design idea of 'multiphase crack inhibition', the chromium element reacts with the carbon element and the boron element to generate carbide to inhibit the coarsening of crystal grains of the cladding layer, so that the cladding layer of the edge of the banknote cutter is prevented from cracking; the combination of the chromium element and the silicon element can generate more second phases, inhibit the cracking of a high-hardness martensite phase and enable the cutting edge of the banknote cutter to have high hardness; the hardness can reach 60HRC to 63HRC. The cladding average friction coefficient of the edge of the banknote cutter is 0.396, and the average abrasion weight loss in unit time is 0.76 multiplied by 10 -7 g/s。
2. The combination of Cr and Nb elements can produce phase change diversity in the cladding layer, and prevent intergranular corrosion phenomenon of the cladding layer; in addition, the corrosion and the cracking of the cladding layer caused by the overheating phenomenon can be prevented during the multilayer cladding; in the invention, the components are calculated by weight percentage and are Cr:17.0wt% -17.3wt%, nb:0.08-0.12wt%, and the cladding layer does not generate corrosion points within 24 hours of the neutral salt spray test.
3. The combination of the three elements of Mo, nb and V can realize that the cutting edge of the paper money knife does not crack after multi-layer cladding (the thickness is within 5 mm); according to the different precipitation mechanisms of Mo, nb and V, when the weight percentage of Mo:0.18 to 0.22wt%, nb:0.08 to 0.12wt%, V:0.23-0.27wt%, when the ternary element is jointly added into the alloy powder, the form and distribution of M-C (B) precipitates in the cladding layer are changed, and various carbon element chemical phases are produced in the microstructure of the cladding layer, so that the cladding layer does not crack or have reduced impact toughness when multilayer laser cladding is carried out.
4. The combination of three elements of Ni, mn and C can produce more various austenite phases and martensite phases; after trace amount of substitute austenite forming elements, namely nickel elements and manganese elements, are added, the austenite phase is more stable, and the service life of the laser-strengthened banknote cutter blade is positively influenced.
5. The laser cladding alloy powder for improving the abrasion resistance and corrosion resistance of the banknote cutter blade is matched with the fiber laser, so that the deformation of the banknote cutter blade after laser cladding can be controlled within 2 mm.
6. The laser cladding alloy powder of the invention does not use expensive alloy elements, so that the cost is low.
Drawings
Fig. 1 is a schematic structural diagram of a using state of the laser cladding alloy powder for improving the wear resistance and corrosion resistance of the cutting edge of the banknote cutter (the laser cladding alloy powder is not shown);
fig. 2 is a simulation diagram of a phase transition process of a cladding layer of the cutting edge of the banknote cutter when laser cladding is performed by using laser cladding alloy powder in the second embodiment of the present invention;
fig. 3 is a diagram illustrating a phase transition process and hardness simulation calculation of a cladding layer CCT of a cutting edge of a banknote cutter when laser cladding is performed by using laser cladding alloy powder according to a second embodiment of the present invention;
fig. 4 is a schematic view of a normal temperature wear resistance test of a cladding layer on a cutting edge of a banknote cutter after laser cladding is performed by using laser cladding alloy powder in the second embodiment of the present invention, wherein an average friction coefficient of the cutting edge of the banknote cutter is 0.396.
The reference numbers in the figures are:
1-powder feeding mechanism and 2-paper money knife edge.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the technical solutions in the present invention, all other embodiments obtained by a person of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
The invention provides laser cladding alloy powder for improving the wear resistance and corrosion resistance of a banknote cutter blade, which comprises the following chemical components:
c is between 0.26 and 0.29 percent by weight; cr is more than or equal to 17.0wt% and less than or equal to 17.3wt%; ni is more than or equal to 0.18wt% and less than or equal to 0.22wt%; mn is more than or equal to 0.4 weight percent and less than or equal to 0.5 weight percent; mo is between 0.18 and 0.22 weight percent; nb is more than or equal to 0.08wt% and less than or equal to 0.12wt%; v is more than or equal to 0.23 weight percent and less than or equal to 0.27 weight percent; b is more than or equal to 1.3 weight percent and less than or equal to 1.4 weight percent; si is more than or equal to 0.7wt% and less than or equal to 0.8wt%, and the balance is Fe.
As shown in fig. 1, the banknote cutter blade 2 is laser-clad by the powder feeding mechanism 1. The four elements of C, B, si and Cr are combined to improve the hardness and the wear resistance of the cladding layer; the combination of the three elements of Mo, nb and V prevents the cracking of the cladding layer caused by overheating during cladding; the combination of three elements of Ni, mn and C improves the proportion of austenite phase (martensite phase) in the cladding layer and diversifies the manufacturing structure, so as to balance the content of ferrite in the cladding layer and further prevent the cladding layer from cracking through a dual-phase structure that the matrix phase is martensite and ferrite.
According to the selection principle of elements (the basic principle of element range selection), the selection basis of elements (the design idea of 'carbon reduction element + multiphase crack inhibition' in the invention) and the selection basis of element content (namely 1, the hardness range of a cladding layer required by the industry is between 60 and 63 HRC; 2, corrosion resistance is provided; 3, cracking is not generated), the selection of the components of the alloy powder is further explained:
C. b, si and Cr, and 1) according to the design idea of 'reducing carbon element': the boron element is used for replacing the carbon element, so that the content of the carbon element can be reduced while the hardness is not reduced. The boron element can also reduce the melting point of the alloy powder and prevent the risk that the cladding layer of the banknote knife blade 2 is overheated, so that the cladding layer is cracked. 2) According to the design idea of 'multiphase crack inhibition': the chromium element reacts with the carbon element and the boron element to generate carbide to inhibit the coarsening of the crystal grains of the cladding layer, thereby preventing the cracking of the cladding layer of the banknote knife blade 2; the combination of the chromium element and the silicon element can generate more second phases, so that the cracking of a high-hardness martensite phase is inhibited, and the cutting edge 2 of the banknote cutter has high hardness; the hardness can reach 60HRC to 63HRC.
Firstly, when the carbon element and the boron element are jointly added into the alloy powder, when the weight proportion of the carbon element and the boron element is respectively lower than 0.26wt% and 1.3wt%, the hardness range of the cladding layer can not meet the requirement no matter how other elements are adjusted; and when the carbon element and the boron element are respectively higher than 0.29wt% and 1.4wt%, the cladding layer is easy to corrode and crack, and the crack and the corrosion have certain relation.
Secondly, the content of chromium is closely related to the content of carbon and boron; when the chromium element is more than 17.3 percent, the hardness of the cladding layer is less than 60HRC, and at this time, the content of more carbon element and boron element needs to be increased to improve the hardness of the cladding layer, which will sacrifice the hot corrosion resistance and comprehensive mechanical property of the cladding layer. When the chromium content is less than 17.0wt%, the corrosion resistance of the cladding layer cannot be ensured, and more importantly, when the chromium content is less than 17.0wt%, the risk of cracking of the cladding layer is increased greatly.
Thirdly, the silicon element is an element essential to the iron-based alloy, and under the condition that the contents of the carbon element, the boron element and the chromium element are fixed, when the content of the silicon element is more than 0.8wt% or less than 0.7wt%, the phenomena of pores and cracks of the cladding layer are increased.
Cr and Nb are combined. The chromium element and the niobium element are combined to manufacture the cladding layer, and the cladding layer is prevented from being corroded and cracked due to overheating during multilayer cladding. The banknote cutter blade 2 is thin and thick in cladding, and a cladding layer can generate a red-melting overheating phenomenon during multilayer cladding, so that the banknote cutter blade 2 is prevented from cracking and corroding in the service process; under the condition that the content of the chromium element is fixed, when the content of the niobium element is higher than 0.12wt%, a cladding layer is easy to crack and corrode; when the content of niobium is less than 0.08wt%, cracking of the cladding layer due to overheating cannot be ensured by chromium alone.
The three elements of Mo, nb and V are combined. According to the difference of the precipitation mechanism of the three elements, various carbon element chemical phases are produced in the microstructure of the cladding layer, and the impact toughness of the cladding layer is prevented from being reduced. In experiments, the trend that the toughness of a cladding layer is reduced cannot be effectively inhibited by adding molybdenum, niobium and vanadium into alloy powder independently or pairwise; when the components are calculated by weight percentage, mo:0.18 to 0.22wt percent; nb:0.08 to 0.12 weight percent; v:0.23 to 0.27 weight percent; when the three elements are added into the alloy powder in a compounding way, the form and the distribution of M-C (B) educts in the cladding layer are changed, and the cladding layer does not crack and have reduced impact toughness even if the multilayer laser cladding is carried out.
Combining three elements of Ni, mn and C. A greater variety of austenite and martensite phases can be produced; the contents of nickel element and manganese element are as follows by weight percent: 0.18 to 0.22wt percent; mn:0.4 to 0.5 weight percent; if the contents of the two elements exceed the upper limit value of the design range, the hardness of the cladding layer is extremely reduced. In view of the metallographic structure of the cladding layer, if the content of austenite is increased only by the interstitial carbon element or if the contents of the nickel element and the manganese element are lower than the lower limit of the design range, the morphology of the M — C (B) compound is coarsened extremely when laser cladding is performed on the bill knife blade 2 due to cladding overheating, and the content of the ferrite phase increases accordingly. After trace amount of nickel element and manganese element which are used as substitute austenite forming elements are added, the austenite phase is more stable, and the service life of the banknote cutter blade 2 after laser strengthening is positively influenced.
The rest of the balance is iron element, which ensures the matching property and the mutual melting property of the material property of the base material, increases the bonding strength of the cladding layer and the banknote cutter blade 2, and also has economic consideration.
The overall core idea of the laser cladding alloy powder provided by the invention is based on the design idea of carbon reduction and multiphase crack inhibition. The elements and the element content selected in the laser cladding alloy powder are an integral system, and the function of individually evaluating a certain element or a plurality of elements is very inappropriate without the general core thought of the laser cladding alloy powder.
The following examples are adopted to verify the composition of the laser cladding alloy powder for improving the wear resistance and corrosion resistance of the edge of the banknote cutter.
Example one
1. The laser cladding alloy powder for improving the abrasion resistance and corrosion resistance of the cutting edge of the banknote cutter comprises the following components in percentage by weight:
c:0.26wt%; cr:17.0wt%; ni:0.18wt%; mn:0.4wt%; mo:0.18wt%; nb:0.08wt%; v:0.23wt%; b:1.3wt%; si:0.7wt%, the balance being Fe.
2. Selecting a fiber laser with the spot diameter of 4.0mm for cladding, wherein the power is 5900 watts, and the linear speed is 5mm/s; the thickness of a single cladding layer of the banknote knife edge 2 is 2.5mm, and the total cladding thickness is 5mm.
3. After cladding, the banknote cutter workpiece is placed on a milling machine, laser cladding is carried out on the banknote cutter blade 2 by adopting a lining hardness tester, and the surface hardness and the flaw detection result after laser cladding are shown in the following table 1:
table 1 performance test points at different positions of the cladding layer of the banknote cutter blade
As can be seen from table 1, 5 hardness test points are selected for the surface of the banknote cutter blade 2 subjected to laser cladding by using a linear hardness tester, and the hardness of the test points is 61.5, 61.3, 62.4, 62.7 and 60.5 respectively; the abrasion loss per unit time was calculated to be 0.75X 10 -7 g/s; and (4) no corrosion point exists within 24 hours in a neutral salt spray test.
Example two
1. The laser cladding alloy powder for improving the abrasion resistance and the corrosion resistance of the banknote cutter blade comprises the following components in percentage by weight:
c:0.29wt%; cr:17.3wt%; ni:0.22wt%; mn:0.5wt%; mo:0.22wt%; nb:0.12wt%; v:0.27wt%; b:1.4wt%; si:0.8wt%; the balance being Fe.
2. The fiber laser with the spot diameter of 4.1mm is selected for cladding, the power of the fiber laser is 5850 watts, the linear speed is 4.7mm/s, the thickness of a single cladding layer of the banknote knife edge 2 is 2.4mm, and the total cladding thickness is 4.8mm.
3. After cladding, place paper money sword work piece on the milling machine, adopt the interior formula hardness tester to carry out laser cladding to paper money sword cutting edge 2, 2 superficial hardness and the result of detecting a flaw of paper money sword cutting edge after laser cladding, as shown in following table 2:
table 2 performance test points at different positions of the banknote cutter blade cladding layer
As can be seen from table 2, 5 hardness test points are selected for the surface of the banknote cutter blade 2 subjected to laser cladding by using a linear hardness tester, and the hardness of the test points is 60.2, 60.4, 61.3, 62.8 and 62.2 respectively; as shown in FIG. 4, the average coefficient of friction of the edge of the bill knife is 0.396, and the amount of wear per unit time is calculated to be 0.76X 10 -7 g/s; and (4) no corrosion point exists within 24 hours in a neutral salt spray test.
As shown in fig. 2 below, the content of B and Si elements in the alloy powder is high, but during laser cladding, B and Si elements play a role in removing oxygen and slagging (protecting other elements from burning by burning), that is, the content of the two elements in the cladding layer is much less than that of the powder. From fig. 2, the phase change of the components in the cladding layer can be seen; because the final performance of the banknote cutter blade is directly reflected by the cladding layer, not by the alloy powder, the burning loss of elements in the cladding (welding) process is inevitable.
As shown in fig. 3 below, the theoretical calculation of the phase change and hardness of the microstructure of the cladding layer after the alloy powder is changed from liquid to solid by the laser light. In addition, fig. 3 also further illustrates that the binary equilibrium phase diagram of fig. 2 cannot describe the defect of non-equilibrium phase transition in a low-temperature environment (below 800 ℃).
EXAMPLE III
1. The laser cladding alloy powder for improving the abrasion resistance and the corrosion resistance of the banknote cutter blade comprises the following components in percentage by weight:
c:0.275wt%; cr:17.15wt%; ni:0.20wt%; mn:0.45wt%; mo:0.20wt%; nb:0.10wt%; v:0.25wt%; b:1.35wt%; si:0.75wt%; fe is the rest.
2. Selecting a fiber laser with the spot diameter of 4.2mm for cladding, wherein the power is 5950 watts, the linear speed is 4.5mm/s, the thickness of a single cladding layer of the bill knife blade 2 is 2.5mm, and the total cladding thickness is 5.0mm.
3. After cladding, the banknote cutter workpiece is placed on a milling machine, laser cladding is carried out on the banknote cutter blade 2 by adopting a lining hardness tester, and the surface hardness and flaw detection results of the banknote cutter blade 2 after laser cladding are shown in the following table 3:
TABLE 3 Performance test points at different positions of the cladding layer of the banknote cutter blade
As can be seen from Table 3, the samples were takenSelecting 5 hardness test points on the surface of the banknote cutter blade 2 subjected to laser cladding by using a lining hardness tester, wherein the hardness test points are 61.6, 603, 62.9, 62.1 and 61.7; the abrasion loss per unit time was calculated to be 0.77X 10 -7 g/s; and in a neutral salt spray test, no corrosion point exists within 24 hours.
Example four
1. The laser cladding alloy powder for improving the abrasion resistance and the corrosion resistance of the banknote cutter blade comprises the following components in percentage by weight:
c:0.265wt%; cr:17.10wt%; ni:0.19wt%; mn:0.43wt%; mo:0.19wt%; nb:0.09wt%; v:0.24wt%; b:1.32wt%; si:0.73wt%, the balance being Fe.
2. Selecting a fiber laser with the spot diameter of 4.3mm for cladding, wherein the power is 5970 watts, and the linear speed is 4.6mm/s; the thickness of a single cladding layer of the banknote knife edge 2 is 2.4mm, and the total cladding thickness is 4.8mm.
3. After cladding, the banknote cutter workpiece is placed on a milling machine, laser cladding is performed on the banknote cutter blade 2 by adopting a lining hardness tester, and the surface hardness and flaw detection results after laser cladding are shown in the following table 4:
table 4 performance test points at different positions of the banknote cutter blade cladding layer
As can be seen from table 4, 5 hardness test points are selected for the surface of the banknote cutter blade 2 subjected to laser cladding by using the internal hardness tester, and the hardness of the test points is 60.7, 60.9, 61.3, 62.0 and 62.6 respectively; the abrasion loss per unit time was calculated to be 0.75X 10 -7 g/s; and (4) no corrosion point exists within 24 hours in a neutral salt spray test.
EXAMPLE five
1. The laser cladding alloy powder for improving the abrasion resistance and the corrosion resistance of the banknote cutter blade comprises the following components in percentage by weight:
c:0.28wt%; cr:17.20wt%; ni:0.21wt%; mn:0.47wt%; mo:0.21wt%; nb:0.11wt%; v:0.26wt%; b:1.37wt%; si:0.77wt%, the balance being Fe.
2. Selecting a fiber laser with the spot diameter of 4.4mm for cladding, wherein the power is 6000 watts, and the linear velocity is 4.8mm/s; the thickness of a single cladding layer of the banknote knife edge 2 is 2.5mm, and the total cladding thickness is 5mm.
3. After cladding, the banknote cutter workpiece is placed on a milling machine, laser cladding is performed on the banknote cutter blade 2 by adopting a lining hardness tester, and the surface hardness and flaw detection results after laser cladding are shown in the following table 5:
TABLE 5 Performance test points at different positions of the cladding layer of the banknote cutter blade
As can be seen from table 5, 5 hardness test points are selected for testing the surface of the banknote cutter blade 2 subjected to laser cladding by using a linear hardness tester, and the hardness of the test points is 62.4, 61.8, 60.1, 60.3 and 61.7 respectively; the abrasion loss per unit time was calculated to be 0.76X 10 -7 g/s; and (4) no corrosion point exists within 24 hours in a neutral salt spray test.
Claims (4)
1. The laser cladding alloy powder for improving the abrasion resistance and corrosion resistance of the cutting edge of the banknote cutter is characterized by comprising the following components in percentage by weight:
c is more than or equal to 0.26 weight percent and less than or equal to 0.29 weight percent; cr is more than or equal to 17.0wt% and less than or equal to 17.3wt%; ni is more than or equal to 0.18wt% and less than or equal to 0.22wt%; mn is more than or equal to 0.4 weight percent and less than or equal to 0.5 weight percent; mo is between 0.18 and 0.22 weight percent; nb is more than or equal to 0.08wt% and less than or equal to 0.12wt%; v is more than or equal to 0.23 weight percent and less than or equal to 0.27 weight percent; b is more than or equal to 1.3 weight percent and less than or equal to 1.4 weight percent; si is more than or equal to 0.7wt% and less than or equal to 0.8wt%, and the balance is Fe.
2. The laser cladding alloy powder for improving the wear resistance and corrosion resistance of the cutting edge of the banknote cutter according to claim 1, wherein the components in percentage by weight comprise:
c:0.26wt%; cr:17.0wt%; ni:0.18wt%; mn:0.4wt%; mo:0.18wt%; nb:0.08wt%; v:0.23wt%; b:1.3wt%; si:0.7wt%, and the balance Fe.
3. The laser cladding alloy powder for improving the wear resistance and corrosion resistance of the banknote knife blade according to claim 1, wherein the components in percentage by weight comprise:
c:0.29wt%; cr:17.3wt%; ni:0.22wt%; mn:0.5wt%; mo:0.22wt%; nb:0.12wt%; v:0.27wt%; b:1.4wt%; si:0.8wt%, the balance being Fe.
4. The laser cladding alloy powder for improving the wear resistance and corrosion resistance of the cutting edge of the banknote cutter according to claim 1, wherein the components in percentage by weight comprise:
c:0.275wt%; cr:17.15wt%; ni:0.20wt%; mn:0.45wt%; mo:0.20wt%; nb:0.10wt%; v:0.25wt%; b:1.35wt%; si:0.75wt%; the balance being Fe.
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| CN101709469A (en) * | 2009-12-10 | 2010-05-19 | 中国人民解放军装甲兵工程学院 | Iron-based alloy powder material for plasma cladding quick forming |
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| CN110799663A (en) * | 2017-06-21 | 2020-02-14 | 霍加纳斯股份有限公司 | Iron-based alloy suitable for providing a hard and corrosion-resistant coating on a substrate, article having a hard and corrosion-resistant coating, and method for manufacturing the same |
| CN111218682A (en) * | 2020-01-09 | 2020-06-02 | 浙江工业大学 | Corrosion-resistant and wear-resistant iron-based laser cladding powder and laser cladding method thereof |
| CN112323060A (en) * | 2020-10-15 | 2021-02-05 | 钟志锋 | Powder steel laser cladding cutter and production process thereof |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101709469A (en) * | 2009-12-10 | 2010-05-19 | 中国人民解放军装甲兵工程学院 | Iron-based alloy powder material for plasma cladding quick forming |
| CN102650012A (en) * | 2012-05-05 | 2012-08-29 | 张家港市和昊激光科技有限公司 | Special cobalt-based metal ceramic alloy powder for optical fiber laser cladding |
| CN110799663A (en) * | 2017-06-21 | 2020-02-14 | 霍加纳斯股份有限公司 | Iron-based alloy suitable for providing a hard and corrosion-resistant coating on a substrate, article having a hard and corrosion-resistant coating, and method for manufacturing the same |
| CN111218682A (en) * | 2020-01-09 | 2020-06-02 | 浙江工业大学 | Corrosion-resistant and wear-resistant iron-based laser cladding powder and laser cladding method thereof |
| CN112323060A (en) * | 2020-10-15 | 2021-02-05 | 钟志锋 | Powder steel laser cladding cutter and production process thereof |
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