CN107588179B - Novel material for sprocket gas quenching and process for machining sprocket by using novel material - Google Patents
Novel material for sprocket gas quenching and process for machining sprocket by using novel material Download PDFInfo
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Abstract
The invention belongs to the field of material application, and discloses a new material for sprocket gas quenching, which comprises the following components in parts by weight: 0.14 to 0.2 percent of carbon, less than or equal to 0.4 percent of silicon, 0.5 to 0.9 percent of manganese, 1.4 to 1.7 percent of nickel, less than or equal to 0.025 percent of phosphorus, less than or equal to 0.035 percent of sulfur, 1.4 to 1.7 percent of chromium, and the balance of iron. The invention adopts new materials and auxiliary improved technology, so that the production period is shortened to 25 days, and the prepared chain wheel has good comprehensive performance.
Description
Technical Field
The invention belongs to the field of material application, and particularly relates to a novel material for sprocket gas quenching and a process for processing a sprocket by using the material.
Background
With the social progress and the improvement of the environmental requirements of people, garden machines are used by more and more people, and the performance use requirements of products are higher and higher; however, the existing garden machinery uses original materials for parts of accessories, so that the production process is complex, and the raw material process is as follows: blanking, turning, outside carburizing, brazing, outside carburizing and quenching, finish machining, inspecting and packaging; the production period is longer, which reaches more than 50 days, and the batch management of the product by the accessory manufacturer is more difficult due to the overlong production period, so that batch mixing problems can occur, and particularly, the batch management is more important for the product due to the heat treatment required by the chain wheel in the clutch drum. But the update cycle of the product is shorter and shorter, and the materials used by the existing products are difficult to meet the requirements of customers on product update.
Disclosure of Invention
The invention aims to solve the problem of difficulty in batch management due to an overlong production period, and provides a novel material for processing a chain wheel in a clutch drum wheel, so as to solve the problem of the existing product in production. The invention also provides a process for machining the chain wheel by using the material. The new material of the invention changes the existing processing technology and shortens the production period.
The invention is realized by the following technical scheme:
a new material for gas quenching of chain wheels comprises the following components in parts by weight: 0.14 to 0.2 percent of carbon, less than or equal to 0.4 percent of silicon, 0.5 to 0.9 percent of manganese, 1.4 to 1.7 percent of nickel, less than or equal to 0.025 percent of phosphorus, less than or equal to 0.035 percent of sulfur, 1.4 to 1.7 percent of chromium, and the balance of iron.
The invention also claims a process for machining a sprocket wheel using the new material, comprising the steps of: step 1) drawing-annealing, step 2) blanking, step 3) grinding burrs, step 4) outside carburization, step 5) brazing quenching, step 6) quilting and grinding, and step 7) inspecting and packaging.
In particular, the amount of the solvent to be used,
the process comprises the following steps:
step 1), drawing-annealing: drawing-annealing the material for 9 times to form a tooth shape, and entering a machining process after the last drawing-annealing;
step 2), blanking: cutting off and blanking by a circular sawing machine, wherein the thickness of a saw blade is 2mm, and the rotating speed is 300 r/min; and (3) numerical control turning: the rotating speed of the main shaft is 800r/min, and the feeding amount is 0.12 mm/r;
step 3), grinding burrs: using a vibration grinder, wherein the material is quartz stone with the diameter of 10mm, and the grinding time is 30 min;
step 4), outside carburization: the specific parameters are as follows: the charging amount of each furnace is 220Kg, the preheating time is 60-90min at 300 ℃ and 400 ℃, the propane in the furnace is 8-10L/min, and the methanol flow is 55 +/-2 ml/min;
step 5), brazing quenching: the parameters are that the temperature of the four zones is 972-1050-1092-1040 ℃ respectively, and the mesh belt speed is 430 revolutions/min;
step 6), quilting and grinding: the method comprises two procedures of rough quilting and fine quilting, wherein the rough quilting parameters are that the rotating speed of a main shaft is 1800r/min, the cutting speed is 73.4m/min, the cutting depth is 0.08mm, and a quilting and grinding cutter is used for quilting and grinding the diamond blade with 50 meshes; finely honing parameters are that the rotating speed of a main shaft is 1900r/min, the cutting speed is 77.6m/min, the cutting depth is 0.01mm, and a honing cutter is used for honing and grinding the diamond cutter strip with 80 meshes;
and 7) inspecting and packaging.
The starting point and the beneficial effects of the invention mainly comprise but are not limited to the following aspects:
the material has the outstanding characteristics that the production process can be greatly changed after the material is used, the gas quenching process is realized while brazing, the heat treatment after one brazing is removed, the production process is shortened to 25 days, and the turnover process of the product is reduced due to the removal of one heat treatment, so that the batch management difficulty of the product is greatly reduced. The invention thoroughly solves the problems existing in the use process of the original material.
The invention adopts new materials and auxiliary improved process, so that the production period is greatly shortened and is doubled compared with the conventional materials; the chain wheel prepared by the invention has good comprehensive performance, wherein the impact resistance reaches 80J/CM2Above, the elongation rate reaches more than 15%, the tensile strength reaches more than 800MPa, and the carburization depth is improved compared with the comparative example. In conclusion, the invention greatly improves the comprehensive performance of the chain wheel.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the present invention will be described more clearly and completely below with reference to specific embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. 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.
Example 1
A new material for gas quenching of chain wheels comprises the following components in parts by weight: 0.14% of carbon, 0.2% of silicon, 0.5% of manganese, 1.4% of nickel, 0.02% of phosphorus, 0.03% of sulfur, 1.4% of chromium and the balance of iron;
the process for machining the chain wheel by using the material comprises the following steps:
drawing-annealing: the raw material blank is round steel with the diameter of 35mm, the tooth form of the product is formed by drawing and annealing repeatedly for 9 times, and the machining procedure is carried out after the last drawing, forming and annealing;
blanking: cutting off and blanking by a circular sawing machine, wherein the thickness of a saw blade is 2mm, and the rotating speed is 300 r/min;
and (3) numerical control turning: the rotating speed of the main shaft is 800r/min, and the feeding amount is 0.12 mm/r;
and (3) grinding burrs: using a vibration grinder, wherein the used material is quartz stone with the diameter of about 10mm, the grinding time is 30min,
outside carburization: the carburizing technological parameters are as follows: the charging amount of each furnace is 220Kg, the preheating time is 60-90min at 300 ℃ and 400 ℃, the propane in the furnace is 8-10L/min, and the methanol flow is 55 +/-2 ml/min;
brazing and quenching: the technological parameters are that the temperature of the four zones is 972-;
quilting and grinding: the method comprises two procedures of rough quilting and fine quilting, wherein the rough quilting parameters comprise that the rotating speed of a main shaft is 1800r/min, the cutting speed is 73.4m/min, the cutting depth is 0.08mm, a quilting and grinding cutter is used for quilting and grinding the diamond blade with 50 meshes, the fine quilting parameters comprise that the rotating speed of the main shaft is 1900r/min, the cutting speed is 77.6m/min, the cutting depth is 0.01mm, and the quilting and grinding cutter is used for quilting and grinding the diamond blade with 80 meshes;
and (6) inspecting and packaging.
Example 2
A new material for gas quenching of chain wheels comprises the following components in parts by weight: 0.16% of carbon, 0.2% of silicon, 0.9% of manganese, 1.7% of nickel, 0.01% of phosphorus, 0.01% of sulfur, 1.7% of chromium and the balance of iron;
the process for machining the chain wheel by using the material comprises the following steps:
drawing-annealing: the raw material blank is round steel with the diameter of 35mm, the tooth form of the product is formed by drawing and annealing repeatedly for 9 times, and the machining procedure is carried out after the last drawing, forming and annealing;
blanking: cutting off and blanking by a circular sawing machine, wherein the thickness of a saw blade is 2mm, and the rotating speed is 300 r/min;
and (3) numerical control turning: the rotating speed of the main shaft is 800r/min, and the feeding amount is 0.12 mm/r;
and (3) grinding burrs: using a vibration grinder, wherein the used material is quartz stone with the diameter of about 10mm, the grinding time is 30min,
outside carburization: the carburizing technological parameters are as follows: the charging amount of each furnace is 220Kg, the preheating time is 60-90min at 300 ℃ and 400 ℃, the propane in the furnace is 8-10L/min, and the methanol flow is 55 +/-2 ml/min;
brazing and quenching: the technological parameters are that the temperature of the four zones is 972-;
quilting and grinding: the method comprises two procedures of rough quilting and fine quilting, wherein the rough quilting parameters comprise that the rotating speed of a main shaft is 1800r/min, the cutting speed is 73.4m/min, the cutting depth is 0.08mm, a quilting and grinding cutter is used for quilting and grinding the diamond blade with 50 meshes, the fine quilting parameters comprise that the rotating speed of the main shaft is 1900r/min, the cutting speed is 77.6m/min, the cutting depth is 0.01mm, and the quilting and grinding cutter is used for quilting and grinding the diamond blade with 80 meshes;
and (6) inspecting and packaging.
Comparative example 1
A material for sprocket gas quenching adopts a 20CrNiMO material, and comprises the following components: mass fraction (%): c, carbon C: 0.17 to 0.23, Si: 0.17 to 0.37, manganese Mn: 0.60 to 0.95, S: allowable residual content is less than or equal to 0.035, phosphorus P: allowable residual content is less than or equal to 0.035, Cr: 0.40 to 0.70, Ni: 0.35 to 0.75, Cu: allowable residual content is less than or equal to 0.30, and molybdenum Mo: 0.20-0.30 wt% and the balance of Fe.
The processing technology comprises the following steps: the raw material blank is round steel with the diameter of 35mm, the tooth form of the product is formed by drawing and annealing for 9 times, and the machining process is carried out after the drawing, forming and annealing for the last time: blanking, numerically controlled turning, grinding burrs, outside co-carburizing, brazing, outside co-carburizing and quenching, honing for finish machining, inspecting and packaging; the brazing quenching parameters are that the temperature of the four areas of the brazing furnace is 972-1050-1092-1080 ℃ respectively, and the mesh belt speed is 460 revolutions.
Example 3
The sprockets made in examples 1-2 and comparative example 1 were tested for performance and the results are shown in table 1 below.
TABLE 1
| Group of | Production cycle (d) | Impact work/Ak (J/CM)2) | Hardness (HRC) | Tensile strength (MPa) | Elongation (%) | Carburization depth (mm) |
| Example 1 | 25 | 83.5 | 117.6 | 805.5 | 16.7 | 0.75 |
| Example 2 | 25 | 86.1 | 123.2 | 820.2 | 15.9 | 0.78 |
| Comparative example 1 | 50 | 63.9 | 104.5 | 712.9 | 14.3 | 0.64 |
And (4) conclusion: as can be seen from the results in the table 1, the production cycle of the invention is shortened to 25 days after the new material is used, which is twice as short as that of the conventional material; the chain wheel prepared by the invention has good comprehensive performance, wherein the impact resistance reaches 80J/CM2Above, the elongation rate reaches more than 15%, the tensile strength reaches more than 800MPa, and the carburization depth is improved compared with the comparative example.
The above description should not be taken as limiting the invention to the specific embodiments, but rather, as will be readily apparent to those skilled in the art to which the invention pertains, numerous simplifications or substitutions may be made without departing from the spirit of the invention, which should be construed to fall within the scope of the invention as defined in the claims appended hereto.
Claims (1)
1. A new material for gas quenching of chain wheels comprises the following components in parts by weight: 0.14 to 0.2 percent of carbon, less than or equal to 0.4 percent of silicon, 0.5 to 0.9 percent of manganese, 1.4 to 1.7 percent of nickel, less than or equal to 0.025 percent of phosphorus, less than or equal to 0.035 percent of sulfur, 1.4 to 1.7 percent of chromium, and the balance of iron;
the preparation method comprises the following steps:
step 1), drawing-annealing: drawing-annealing the material for 9 times to form a tooth shape, and entering a machining process after the last drawing-annealing;
step 2), blanking: cutting off and blanking by a circular sawing machine, wherein the thickness of a saw blade is 2mm, and the rotating speed is 300 r/min; and (3) numerical control turning: the rotating speed of the main shaft is 800r/min, and the feeding amount is 0.12 mm/r;
step 3), grinding burrs: using a vibration grinder, wherein the material is quartz stone with the diameter of 10mm, and the grinding time is 30 min;
step 4), outside carburization: the specific parameters are as follows: the charging amount of each furnace is 220Kg, the preheating time is 60-90min at 300 ℃ and 400 ℃, the propane in the furnace is 8-10L/min, and the methanol flow is 55 +/-2 ml/min;
step 5), brazing quenching: the parameters are that the temperature of the four zones is 972-1050-1092-1040 ℃ respectively, and the mesh belt speed is 430 revolutions/min;
step 6), quilting and grinding: the method comprises two procedures of rough quilting and fine quilting, wherein the rough quilting parameters are that the rotating speed of a main shaft is 1800r/min, the cutting speed is 73.4m/min, the cutting depth is 0.08mm, and a quilting and grinding cutter is used for quilting and grinding the diamond blade with 50 meshes; finely honing parameters are that the rotating speed of a main shaft is 1900r/min, the cutting speed is 77.6m/min, the cutting depth is 0.01mm, and a honing cutter is used for honing and grinding the diamond cutter strip with 80 meshes;
and 7) inspecting and packaging.
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| CN201711089447.0A CN107588179B (en) | 2017-11-08 | 2017-11-08 | Novel material for sprocket gas quenching and process for machining sprocket by using novel material |
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| CN201711089447.0A CN107588179B (en) | 2017-11-08 | 2017-11-08 | Novel material for sprocket gas quenching and process for machining sprocket by using novel material |
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| CN107588179B true CN107588179B (en) | 2020-02-07 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1974115A (en) * | 2006-12-05 | 2007-06-06 | 杨高明 | Manufacturing process of chain wheel for chain saw |
| DE102009026935A1 (en) * | 2009-06-15 | 2010-12-16 | Ema Indutec Gmbh | Hardening machine for inductive hardening under inert gas |
| CN103757551A (en) * | 2013-12-12 | 2014-04-30 | 嵊州市特种链轮有限公司 | Mechanically actuated chain wheel material, and manufacturing method thereof |
| CN106011438A (en) * | 2016-07-01 | 2016-10-12 | 兴化东华齿轮有限公司 | Heat treatment induction hardening technique for sprocket wheel |
-
2017
- 2017-11-08 CN CN201711089447.0A patent/CN107588179B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1974115A (en) * | 2006-12-05 | 2007-06-06 | 杨高明 | Manufacturing process of chain wheel for chain saw |
| DE102009026935A1 (en) * | 2009-06-15 | 2010-12-16 | Ema Indutec Gmbh | Hardening machine for inductive hardening under inert gas |
| CN103757551A (en) * | 2013-12-12 | 2014-04-30 | 嵊州市特种链轮有限公司 | Mechanically actuated chain wheel material, and manufacturing method thereof |
| CN106011438A (en) * | 2016-07-01 | 2016-10-12 | 兴化东华齿轮有限公司 | Heat treatment induction hardening technique for sprocket wheel |
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