CN105986274A - Processing method of mine roller parts - Google Patents
Processing method of mine roller parts Download PDFInfo
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- CN105986274A CN105986274A CN201510047013.9A CN201510047013A CN105986274A CN 105986274 A CN105986274 A CN 105986274A CN 201510047013 A CN201510047013 A CN 201510047013A CN 105986274 A CN105986274 A CN 105986274A
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Abstract
The invention discloses a processing method of mine roller parts, the mine roller material is 20CrNiMo steel, and the processing method is characterized by comprising the following steps: A. processing of the outer surface and the tooth of the mine roller gear parts, keeping of cylindrical allowance; B. carburizing treatment, wherein the carburizing temperature is 820 to 950 DEG C, the carburizing time is 320 to 500 min, the depth of a carburized layer is 0.8 to 1.42 mm; C. the removal of cylindrical allowance; D. quenching treatment; wherein the quenching time is 65 to 85 min, the quenching temperature is 755 to 890 DEG C, the depth of the quenched layer is 1.2 to 1.6 mm; E. parts processing to finished product; and F. inspection and storage. According to the processing method, an method for employing an anti-seepage paint for anti-seepage treatment on the outer surface besides the tooth of the parts in the prior art is abandoned, the negative impact on the cooling rate and permeability of products during quenching of the product is eliminated, so that the tooth surface hardness and outer surface hardness of the parts can reach the processing requirements.
Description
Technical field
The invention belongs to processing technique field, specifically a kind of mine gear wheel method of processing parts.
Background technology
In the prior art, a kind of mine gear wheel, its material is 20CrNiMo, and it is a kind of structural alloy steel, and the quenching degree of 20CrNiMo round steel is higher, and without temper brittleness, weldability is fairly good, and the tendency forming cold cracking is the least, and machinability and cold strain plasticity are good；For mine gear wheel part, usually require that its tooth face hardness reaches 56-62HRC, effective hardness layer 1.80-2.20mm, periphery in addition to the flank of tooth need to do Anti-seeping technology, hardness requirement is 30-45HRC, therefore to make mine gear wheel part reach processing request, generally individually use the processing method of carburizing and quenching, in prior art, product metallographic structure is qualified, mine gear wheel part tooth face hardness is 57-58HRC, the cylindrical hardness of antiseepage is 17-18HRC, from assay, antiseepage part cylindrical hardness does not reaches processing request, detect through metallographic, the tissue of product is essentially ferrite and pearlite, it is in annealed condition, its reason is that impermeable coating has had a strong impact on rate of cooling when product quenches and quenching degree.
Therefore, for solving the problems referred to above, need a kind of mine gear wheel method of processing parts, make the tooth face hardness of mine gear wheel part and periphery hardness all can reach processing request.
Summary of the invention
The deficiency existed in view of prior art, the purpose of the present invention is to propose to a kind of mine gear wheel method of processing parts, eliminate the negative effect of rate of cooling when product is quenched and quenching degree, make the tooth face hardness of mine gear wheel part and periphery hardness all can reach processing request.
The technical scheme realizing the object of the invention is as follows:
A kind of mine gear wheel method of processing parts, described mine gear wheel material is 20CrNiMo steel, it is characterised in that this processing method comprises the following steps:
A. processing mine gear wheel part outer and teeth portion, cylindrical made allowance 3.0-3.5mm；
B. Carburization Treatment；The carbon potential of Carburization Treatment is 1.32-1.55%, and carburizing temperature is 820-950 DEG C, and carburizing time is 320-500min, and carburized (case) depth is 0.8-1.42mm, and the slow cooling time is 60-75min；
C. removing cylindrical surplus, surplus is 3.0-3.5mm；
D. Quenching Treatment；During Quenching Treatment, in stove, carbon potential is 0.72-0.78%, and the cool time is 65-85min, and hardening heat is 755-890 DEG C, and depth of hardening is 1.2-1.6mm；
E. part is carried out Surface Machining to finished product；
F. warehouse-in is checked: completion of processing part is tested, qualified to check whether, warehousing after passing.
A kind of mine gear wheel method of processing parts of the present invention, abandon the method using impermeable coating that part periphery in addition to teeth portion is carried out Anti-seeping technology in prior art, eliminate the negative effect of rate of cooling when product is quenched and quenching degree, make the tooth face hardness of part and periphery hardness all can reach processing request.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described, and its operating procedure is as follows:
A kind of mine gear wheel method of processing parts, described mine gear wheel material is 20CrNiMo steel, and this processing method comprises the following steps:
C. processing mine gear wheel part outer and teeth portion, cylindrical made allowance 3.0-3.5mm；
D. Carburization Treatment；The carbon potential of Carburization Treatment is 1.32-1.55%, and carburizing temperature is 820-950 DEG C, and carburizing time is 320-500min, and carburized (case) depth is 0.8-1.42mm, and the slow cooling time is 60-75min；
C. removing cylindrical surplus, surplus is 3.0-3.5mm；
D. Quenching Treatment；During Quenching Treatment, in stove, carbon potential is 0.72-0.78%, and the cool time is 65-85min, and hardening heat is 755-890 DEG C, and depth of hardening is 1.2-1.6mm；
E. part is carried out Surface Machining to finished product；
The preferred embodiment of the present invention described in detail above.Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to the design of the present invention without creative work.Therefore, all technical staff in the art, all should be at the protection domain being defined in the patent claims the most on the basis of existing technology by logic minute analysis, reasoning or the available technical scheme of limited experiment.
Claims (1)
1. a mine gear wheel method of processing parts, described mine gear wheel material is 20CrNiMo steel, it is characterised in that this processing method comprises the following steps:
A. processing mine gear wheel part outer and teeth portion, cylindrical made allowance 3.0-3.5mm；
B. Carburization Treatment；The carbon potential of Carburization Treatment is 1.32-1.55%, and carburizing temperature is 820-950 DEG C, and carburizing time is 320-500min, and carburized (case) depth is 0.8-1.42mm, and the slow cooling time is 60-75min；
C. removing cylindrical surplus, surplus is 3.0-3.5mm；
D. Quenching Treatment；During Quenching Treatment, in stove, carbon potential is 0.72-0.78%, and the cool time is 65-85min, and hardening heat is 755-890 DEG C, and depth of hardening is 1.2-1.6mm；
E. part is carried out Surface Machining to finished product；
F. warehouse-in is checked: completion of processing part is tested, qualified to check whether, warehousing after passing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510047013.9A CN105986274A (en) | 2015-01-30 | 2015-01-30 | Processing method of mine roller parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510047013.9A CN105986274A (en) | 2015-01-30 | 2015-01-30 | Processing method of mine roller parts |
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| Publication Number | Publication Date |
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| CN105986274A true CN105986274A (en) | 2016-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510047013.9A Pending CN105986274A (en) | 2015-01-30 | 2015-01-30 | Processing method of mine roller parts |
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| CN (1) | CN105986274A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109366105A (en) * | 2018-11-27 | 2019-02-22 | 胡敏 | A kind of mine gear wheel method of processing parts |
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2015
- 2015-01-30 CN CN201510047013.9A patent/CN105986274A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109366105A (en) * | 2018-11-27 | 2019-02-22 | 胡敏 | A kind of mine gear wheel method of processing parts |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161005 |