Machine barrel wear-resistant layer with high hardness and good wear resistance

Abstract

The invention discloses a machine barrel wear-resistant layer with high hardness and good wear resistance. The machine barrel wear-resistant layer is characterized in that the formula of the machine barrel wear-resistant layer comprises the following components in 100 parts by weight: 1.4-1.8 parts of carbon, 2.7-3.1 parts of boron, 1.5-1.9 parts of silicon, 10-12 parts of chromium, 4.3-4.7 parts of nickel, 0.4-0.8 part of manganese, 3.5-4.5 parts of molybdenum and the balance of iron. The wear-resistant layer has the advantages that the formula of the wear-resistant layer is reasonable in component and convenient to prepare, and the alloy layer prepared by adopting the formula is good in corrosion resistance and high in wear-resistant strength and is beneficial to prolonging the service life of the machine barrel; the main component of the formula is iron which is an extremely common metal and is low in price, so that the formula is beneficial to reducing the manufacturing cost of the wear-resistant layer of the machine barrel, the wear-resistant machine barrel which is low in price and has competitive advantages is manufactured, and the wear-resistant machine barrel is suitable for large-scale industrial production.

Description

Technical Field

[0001] The invention relates to a manufacturing technology of a barrel wear-resistant layer, in particular to a barrel wear-resistant layer with high hardness and good wear resistance. Background Art

[0002] There is a Chinese invention patent application with application number CN201110350863.8 and the name of "Iron-based alloy powder for laser cladding of TRT unit parts", which discloses iron-based alloy powder for laser cladding of failed parts of TRT units. The powder is based on iron-chromium-nickel alloy, and Mo, Nb, N, and Si elements are added to strengthen the matrix. While maintaining moderate hardness, ensuring high strength and wear resistance and other comprehensive properties, the melting point of the alloy is reduced, which is convenient for laser cladding; trace elements Ce and Hf are added to improve the quality of grain boundaries, prevent and avoid cracks, and improve the thermal stability and chemical stability of the cladding layer, so that the alloy has high temperature oxidation resistance, corrosion resistance, and wear resistance, and has a wide range of applications. Failed parts made of carbon steel, structural steel, quenched and tempered steel, stainless steel, and tool steel can all be repaired using this powder combined with laser cladding technology, with extremely broad application prospects and significant benefits. However, the powder needs to be processed by laser, which makes it difficult to insert it into the inner cavity of the barrel for processing. Moreover, the wear-resistant effect of the powder after it is made into a wear-resistant layer is not ideal, and it is difficult to meet the wear-resistant requirements of the barrel wear-resistant layer. The application range is limited, so the powder needs further improvement. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a barrel wear-resistant layer with high hardness and good wear resistance in view of the above-mentioned existing technical status.

[0004] The technical solution adopted by the present invention to solve the above technical problems is: the barrel wear-resistant layer with high hardness and good wear resistance is characterized in that the formula of the barrel wear-resistant layer is 1.4 to 1.8 parts of carbon, 2.7 to 3.1 parts of boron, 1.5 to 1.9 parts of silicon, 10 to 12 parts of chromium, 4.3 to 4.7 parts of nickel, 0.4 to 0.8 parts of manganese, 3.5 to 4.5 parts of molybdenum, and the rest is iron in 100 parts by weight.

[0005] As an improvement, the formula of the barrel wear-resistant layer is as follows: carbon: 1.6 parts, boron: 2.9 parts, silicon: 1.7 parts, chromium: 11 parts, nickel: 4.5 parts, manganese: 0.6 parts, molybdenum: 4 parts, and the rest is iron in 100 parts by weight.

[0006] Further improved, the method for making the barrel wear-resistant layer consists of the following steps:

[0007] 1. Select the barrel blank and process the barrel blank into a barrel;

[0008] 2. A formula for preparing alloy powder, wherein the formula comprises, based on 100 parts by weight: 1.6 parts of carbon, 2.9 parts of boron, 1.7 parts of silicon, 11 parts of chromium, 4.5 parts of nickel, 0.6 parts of manganese, 4 parts of molybdenum, and the remainder of iron.

[0009] 3. According to the formula of step 2, the alloy powder and glue are mixed into a mixture at a temperature of 75-77°C, and the mixture is stirred until uniform;

[0010] 4. Select a pull wire with set strength, evenly stick diamond sand on the pull wire and set aside;

[0011] 5. Put the mixture at a temperature of 75-77°C into the inner cavity of a barrel controlled at a temperature of 75-77°C, place circular mold frames in the inner cavities at both ends of the barrel, and form circular cavities between the outer circumference of the circular mold frames and the circumference of the corresponding inner wall of the barrel; pass the wire coated with diamond sand through the circular cavities at both ends of the barrel, and extend the two ends of the wire from the two ends of the barrel respectively, and make the wire heads extending from the two ends of the barrel move in a circular motion synchronously with the circular cavities, and at the same time, the barrel rotates slowly through the transmission device, and the mixture in the inner cavity of the barrel is evenly coated on the inner wall of the barrel through the rotation of the wire and the barrel, and the thickness of the mixture coated on the inner wall of the barrel is the distance between the inner wall of the barrel and the outer circumference of the circular mold frame minus one line;

[0012] 6. Place the barrel coated with the mixture in a vacuum furnace and heat it to 1550-1600°C, keep it warm for 9-10 hours, then cool it naturally to 73-77°C, and then place the barrel at a temperature of 73-77°C in a vacuum furnace at 380-460°C for tempering for 1.5-2 hours;

[0013] 7. Take the tempered barrel out of the vacuum furnace and then polish it to make a wear-resistant barrel with a wear-resistant layer on the inner wall.

[0014] As a further improvement, the slow rotation speed in step five is 2 to 3 revolutions per minute.

[0015] As an improvement, the glue is oily glue.

[0016] In a further improvement, the oily glue is obtained by dissolving acrylic acid or polyurethane in toluene or butanone.

[0017] As an improvement, the temperature of natural cooling in step six is ​​75°C.

[0018] As an improvement, the tempering temperature in the vacuum furnace in step six is ​​controlled to be 450°C.

[0019] As a further improvement, the wire drawing heads extending from both ends of the barrel in step five are respectively connected to mechanical rotating heads and synchronously make circular motion along the annular cavity. The mechanical rotating head is linked to a driving device, and the driving device is connected to a program controller through a circuit.

[0020] Compared with the prior art, the advantages of the present invention are that the formula composition of the wear-resistant layer is reasonable and the preparation is convenient. The alloy layer made by adopting the formula has good corrosion resistance, high wear resistance and long service life of the barrel. Moreover, the main component of the formula is iron, which is an extremely common metal with low price. Therefore, the use of the present invention helps to reduce the production cost of the barrel wear-resistant layer and manufacture a low-cost and competitive wear-resistant barrel suitable for large-scale industrial production. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below with reference to the embodiments.

[0022] The barrel wear-resistant layer of embodiment 1 has high hardness and good wear resistance. The formula of the barrel wear-resistant layer is as follows: carbon: 1.4 parts, boron: 2.7 parts, silicon: 1.5 parts, chromium: 10 parts, nickel: 4.3 parts, manganese: 0.4 parts, molybdenum: 3.5 parts, and the rest is iron in 100 parts by weight.

[0023] The method for making the barrel wear-resistant layer is composed of the following steps:

[0024] 1. Select the barrel blank and process the barrel blank into a barrel;

[0025] 2. A formula for preparing alloy powder, wherein the formula comprises, based on 100 parts by weight: 1.6 parts of carbon, 2.9 parts of boron, 1.7 parts of silicon, 11 parts of chromium, 4.5 parts of nickel, 0.6 parts of manganese, 4 parts of molybdenum, and the remainder of iron.

[0026] 3. According to the formula of step 2, the alloy powder and glue are mixed into a mixture at a temperature of 75-77°C, and the mixture is stirred until uniform;

[0027] 4. Select a pull wire with set strength, evenly stick diamond sand on the pull wire and set aside;

[0028] 5. Put the mixture at a temperature of 75-77°C into the inner cavity of a barrel controlled at a temperature of 75-77°C, place circular mold frames in the inner cavities at both ends of the barrel, and form circular cavities between the outer circumference of the circular mold frames and the circumference of the corresponding inner wall of the barrel; pass the wire coated with diamond sand through the circular cavities at both ends of the barrel, and extend the two ends of the wire from the two ends of the barrel respectively, and make the wire heads extending from the two ends of the barrel move in a circular motion synchronously with the circular cavities, and at the same time, the barrel rotates slowly through the transmission device, and the mixture in the inner cavity of the barrel is evenly coated on the inner wall of the barrel through the rotation of the wire and the barrel, and the thickness of the mixture coated on the inner wall of the barrel is the distance between the inner wall of the barrel and the outer circumference of the circular mold frame minus one line;

[0029] 6. Place the barrel coated with the mixture in a vacuum furnace and heat it to 1550-1600°C, keep it warm for 9-10 hours, then cool it naturally to 73-77°C, and then place the barrel at a temperature of 73-77°C in a vacuum furnace at 380-460°C for tempering for 1.5-2 hours;

[0030] 7. Take the tempered barrel out of the vacuum furnace, and then polish it to make a wear-resistant barrel with a wear-resistant layer on the inner wall. The speed of the slow rotation in step five is 2 to 3 rpm. The glue is an oily glue. The oily glue is an oily glue made by dissolving acrylic acid or polyurethane in toluene or butanone. The temperature of natural cooling in step six is ​​75°C. The tempering temperature in the vacuum furnace in step six is ​​controlled to 450°C. The wire drawing heads extending from both ends of the barrel in step five are respectively connected to the mechanical rotating heads and move synchronously in a circular motion along the annular cavity. The mechanical rotating head is linked to the driving device, and the driving device is connected to the program controller through a line.

[0031] The barrel wear-resistant layer of embodiment 2 has high hardness and good wear resistance. The formula of the barrel wear-resistant layer is as follows: carbon: 1.6 parts, boron: 2.9 parts, silicon: 1.7 parts, chromium: 11 parts, nickel: 4.5 parts, manganese: 0.6 parts, molybdenum: 4 parts, and the rest is iron in 100 parts by weight.

[0032] The method for making the barrel wear-resistant layer is composed of the following steps:

[0033] 1. Select the barrel blank and process the barrel blank into a barrel;

[0034] 2. The formula of the alloy powder is prepared. The formula of the barrel wear-resistant layer is 1.6 parts of carbon, 2.9 parts of boron, 1.7 parts of silicon, 11 parts of chromium, 4.5 parts of nickel, 0.6 parts of manganese, 4 parts of molybdenum, and the rest is iron in 100 parts by weight.

[0035] 3. According to the formula of step 2, the alloy powder and glue are mixed into a mixture at a temperature of 75-77°C, and the mixture is stirred until uniform;

[0036] 4. Select a pull wire with set strength, evenly stick diamond sand on the pull wire and set aside;

[0037] 5. Put the mixture at a temperature of 75-77°C into the inner cavity of a barrel controlled at a temperature of 75-77°C, place circular mold frames in the inner cavities at both ends of the barrel, and form circular cavities between the outer circumference of the circular mold frames and the circumference of the corresponding inner wall of the barrel; pass the wire coated with diamond sand through the circular cavities at both ends of the barrel, and extend the two ends of the wire from the two ends of the barrel respectively, and make the wire heads extending from the two ends of the barrel move in a circular motion synchronously with the circular cavities, and at the same time, the barrel rotates slowly through the transmission device, and the mixture in the inner cavity of the barrel is evenly coated on the inner wall of the barrel through the rotation of the wire and the barrel, and the thickness of the mixture coated on the inner wall of the barrel is the distance between the inner wall of the barrel and the outer circumference of the circular mold frame minus one line;

[0038] 6. Place the barrel coated with the mixture in a vacuum furnace and heat it to 1550-1600°C, keep it warm for 9-10 hours, then cool it naturally to 73-77°C, and then place the barrel at a temperature of 73-77°C in a vacuum furnace at 380-460°C for tempering for 1.5-2 hours;

[0039] 7. Take the tempered barrel out of the vacuum furnace, and then polish it to make a wear-resistant barrel with a wear-resistant layer on the inner wall. The speed of the slow rotation in step five is 2 to 3 rpm. The glue is an oily glue. The oily glue is an oily glue made by dissolving acrylic acid or polyurethane in toluene or butanone. The temperature of natural cooling in step six is ​​75°C. The tempering temperature in the vacuum furnace in step six is ​​controlled to 450°C. The wire drawing heads extending from both ends of the barrel in step five are respectively connected to the mechanical rotating heads and move synchronously in a circular motion along the annular cavity. The mechanical rotating head is linked to the driving device, and the driving device is connected to the program controller through a line.

[0040] The barrel wear-resistant layer of embodiment 3 has high hardness and good wear resistance. The formula of the barrel wear-resistant layer is as follows: carbon: 1.8 parts, boron: 3.1 parts, silicon: 1.9 parts, chromium: 12 parts, nickel: 4.7 parts, manganese: 0.8 parts, molybdenum: 4.5 parts, and the rest is iron in 100 parts by weight.

[0041] The method for making the barrel wear-resistant layer is composed of the following steps:

[0042] 1. Select the barrel blank and process the barrel blank into a barrel;

[0043] 2. The formula of the alloy powder is prepared. The formula of the barrel wear-resistant layer is 1.8 parts of carbon, 3.1 parts of boron, 1.9 parts of silicon, 12 parts of chromium, 4.7 parts of nickel, 0.8 parts of manganese, 4.5 parts of molybdenum, and the rest is iron in 100 parts by weight.

[0044] 3. According to the formula of step 2, the alloy powder and glue are mixed into a mixture at a temperature of 75-77°C, and the mixture is stirred until uniform;

[0045] 4. Select a pull wire with set strength, evenly stick diamond sand on the pull wire and set aside;

[0046] 5. Put the mixture at a temperature of 75-77°C into the inner cavity of a barrel controlled at a temperature of 75-77°C, place circular mold frames in the inner cavities at both ends of the barrel, and form circular cavities between the outer circumference of the circular mold frames and the circumference of the corresponding inner wall of the barrel; pass the wire coated with diamond sand through the circular cavities at both ends of the barrel, and extend the two ends of the wire from the two ends of the barrel respectively, and make the wire heads extending from the two ends of the barrel move in a circular motion synchronously with the circular cavities, and at the same time, the barrel rotates slowly through the transmission device, and the mixture in the inner cavity of the barrel is evenly coated on the inner wall of the barrel through the rotation of the wire and the barrel, and the thickness of the mixture coated on the inner wall of the barrel is the distance between the inner wall of the barrel and the outer circumference of the circular mold frame minus one line;

[0047] 6. Place the barrel coated with the mixture in a vacuum furnace and heat it to 1550-1600°C, keep it warm for 9-10 hours, then cool it naturally to 73-77°C, and then place the barrel at a temperature of 73-77°C in a vacuum furnace at 380-460°C for tempering for 1.5-2 hours;

[0048] 7. Take the tempered barrel out of the vacuum furnace, and then polish it to make a wear-resistant barrel with a wear-resistant layer on the inner wall. The speed of the slow rotation in step five is 2 to 3 rpm. The glue is an oily glue. The oily glue is an oily glue made by dissolving acrylic acid or polyurethane in toluene or butanone. The temperature of natural cooling in step six is ​​75°C. The tempering temperature in the vacuum furnace in step six is ​​controlled to 450°C. The wire drawing heads extending from both ends of the barrel in step five are respectively connected to the mechanical rotating heads and move synchronously in a circular motion along the annular cavity. The mechanical rotating head is linked to the driving device, and the driving device is connected to the program controller through a line.

Claims

1. A barrel wear-resistant layer with high hardness and good wear resistance, characterized in that: The formula of the barrel wear-resistant layer is as follows: carbon: 1.4-1.8 parts, boron: 2.7-3.1 parts, silicon: 1.5-1.9 parts, chromium: 10-12 parts, nickel: 4.3-4.7 parts, manganese: 0.4-0.8 parts, molybdenum: 3.5-4.5 parts, and the rest is iron in 100 parts by weight.

2. The barrel wear-resistant layer according to claim 1, characterized in that: The formula of the barrel wear-resistant layer is as follows: carbon: 1.6 parts, boron: 2.9 parts, silicon: 1.7 parts, chromium: 11 parts, nickel: 4.5 parts, manganese: 0.6 parts, molybdenum: 4 parts, and the rest is iron in 100 parts by weight.

3. The barrel wear-resistant layer according to claim 1 or 2, characterized in that: The method for making the barrel wear-resistant layer is composed of the following steps:

1. Select the barrel blank and process the barrel blank into a barrel; 2. A formula for preparing alloy powder, wherein the formula comprises, based on 100 parts by weight: 1.6 parts of carbon, 2.9 parts of boron, 1.7 parts of silicon, 11 parts of chromium, 4.5 parts of nickel, 0.6 parts of manganese, 4 parts of molybdenum, and the remainder of iron.

3. According to the formula of step 2, the alloy powder and glue are mixed into a mixture at a temperature of 75-77°C, and the mixture is stirred until it is uniform; 4. Select a pull wire with set strength, evenly stick diamond sand on the pull wire and set aside; 5. Put the mixture at a temperature of 75-77°C into the inner cavity of a barrel controlled at a temperature of 75-77°C, place circular mold frames in the inner cavities at both ends of the barrel, and form circular cavities between the outer circumference of the circular mold frames and the circumference of the corresponding inner wall of the barrel; pass the wire coated with diamond sand through the circular cavities at both ends of the barrel, and extend the two ends of the wire from the two ends of the barrel respectively, and make the wire heads extending from the two ends of the barrel move in a circular motion synchronously with the circular cavities, and at the same time, the barrel rotates slowly through the transmission device, and the mixture in the inner cavity of the barrel is evenly coated on the inner wall of the barrel through the rotation of the wire and the barrel, and the thickness of the mixture coated on the inner wall of the barrel is the distance between the inner wall of the barrel and the outer circumference of the circular mold frame minus one line; 6. Place the barrel coated with the mixture in a vacuum furnace and heat it to 1550-1600°C, keep it warm for 9-10 hours, then cool it naturally to 73-77°C, and then place the barrel at a temperature of 73-77°C in a vacuum furnace at 380-460°C for tempering for 1.5-2 hours; 7. Take the tempered barrel out of the vacuum furnace and then polish it to make a wear-resistant barrel with a wear-resistant layer on the inner wall.

4. The barrel wear-resistant layer according to claim 3, characterized in that: The speed of the slow rotation in step 5 is 2 to 3 rpm.

5. The barrel wear-resistant layer according to claim 3, characterized in that: The glue is oily glue.

6. The barrel wear-resistant layer according to claim 5, characterized in that: The oily glue is prepared by dissolving acrylic acid or polyurethane in toluene or butanone.

7. The barrel wear-resistant layer according to claim 3, characterized in that: The temperature of natural cooling in step six is ​​75°C.

8. The barrel wear-resistant layer according to claim 3, characterized in that: The tempering temperature in the vacuum furnace in step six is ​​controlled to be 450°C.

9. The barrel wear-resistant layer according to claim 3, characterized in that: The wire drawing heads extending out of both ends of the barrel in step 5 are respectively connected to the mechanical rotating heads and synchronously make circular motion along the annular cavity. The mechanical rotating head is linked to the driving device, and the driving device is connected to the program controller through the circuit.