CN105983818A - Technology for machining positioning rings - Google Patents
Technology for machining positioning rings Download PDFInfo
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- CN105983818A CN105983818A CN201510047039.3A CN201510047039A CN105983818A CN 105983818 A CN105983818 A CN 105983818A CN 201510047039 A CN201510047039 A CN 201510047039A CN 105983818 A CN105983818 A CN 105983818A
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- temperature
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- forging
- nitriding
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Abstract
The invention discloses a technology for machining positioning rings. The technology is characterized by comprising steps of carrying out technological processes of discharging, forging, annealing, machining, tempering, machining, ion nitriding, inspecting and finished product acquiring and the like. The technology for machining the positioning rings has the advantages that the comprehensive performance of the positioning rings can be improved, and the service lives of the positioning rings can be prolonged.
Description
Technical field
The invention belongs to processing technique field, specifically a kind of locating ring processing technique.
Background technology
Locating ring is indispensable part in rotatable parts, while it runs up, and the alternate load concentrated also subject to height.Contact stress is big, thus produces strong friction phenomenon.The performance of locating ring directly determines service life of a machine, and locating ring requires high surface hardness and wear-resisting, and corrosion-resistant, the highest to required precision, it is desirable to deform little after heat treatment, by moderate blow load effect, main failure forms is abrasion.The problems such as to there is hardness the highest always and in view of existing locating ring, and wearability is not enough, its processing technique needs to be optimized further.
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 locating ring processing technique, can improve locating ring combination property and increase the service life.
The technical scheme realizing the object of the invention is as follows:
A kind of locating ring processing technique, it is characterised in that this processing technique comprises the following steps:
(1) technological process: blanking → forging → annealing → machining → quenched → machining → glow discharge nitriding → inspection → finished product；
(2) selection: select 38CrMnAl steel；
(3) forging: heating-up temperature 1100～1150 DEG C, initial forging temperature 1150～1250 DEG C, final forging temperature ＞ 880 DEG C；
(4) annealing: heat with furnace temperature, heating-up temperature 940-980 DEG C, temperature retention time 2-2.5h, furnace cooling, cooling medium air；
(5) machining: roughing, it is thus achieved that coarse part；
(6) modifier treatment: Quenching Treatment, heating furnace is heated to 960-990 DEG C, adds thermal medium nitrogen, temperature retention time 3-3.5h, and oil of quenching is cold；High tempering, temperature is 620～650 DEG C, temper medium air, tempering time 90-120min；
(7) glow discharge nitriding: nitriding temperature 520～580 DEG C, nitriding time 8～12h, gas pressure 130～560Pa, heating voltage 650～750V；
(8) machining: part is carried out retrofit, the roughness of the locating ring after processing is Ra < 0.8 μm；
(9) inspection warehouse-in: first clean after burr, then check warehouse-in.
The present invention uses a kind of locating ring processing technique of 42CrMo Steel material, annealing eliminates its forging and is commonly present coarse grains or tissue defects and the internal stress such as grain size is uneven, make the intensity of steel, plasticity and toughness reach technology requirement i.e. uniform formation, crystal grain thinning, elimination internal stress, improve machinability etc., carry out tissue for finished heat treatment and prepare.Add thermal medium nitrogen, use nitrogen-based atmosphere protection, it is possible to achieve less, non-oxidation processes; avoid oxidation and decarbonization during heat parts; make iron loss, performance reduce, simply need workpiece complete austenitizing during quenching, it is not necessary to austenite is grown up; therefore the cool time is the shortest compared with annealing time; high tempering, improves the moulding and toughness of hardened steel, reduces its fragility; eliminate the residualinternal stress that quenching causes, it is thus achieved that good comprehensive mechanical property；Stablize workpiece size, being organized in during workpiece uses of steel is made not change, penetrating into the nitrogen in steel and on the one hand from outward appearance to inner essence form the nitrided iron of different nitrogen content from ferrum, on the one hand the alloying element in steel is combined formation various alloy nitrides, particularly aluminium nitride, chromium nitride.These nitride have the highest hardness, heat stability and the highest spread, thus the steel part after nitriding can be made to obtain high case hardness, wearability, fatigue strength, seizure resistance, anti-air and superheated steam corrosive power, anti-temper softening ability, and reduce notch sensitivity, therefore locating ring combination property can be improved and increase the service life.
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 locating ring processing technique, this processing technique comprises the following steps:
(1) technological process: blanking → forging → annealing → machining → quenched → machining → glow discharge nitriding → inspection → finished product；
(2) selection: select 38CrMnAl steel；
(3) forging: heating-up temperature 1100～1150 DEG C, initial forging temperature 1150～1250 DEG C, final forging temperature ＞ 880 DEG C；
(4) annealing: heat with furnace temperature, heating-up temperature 940-980 DEG C, temperature retention time 2-2.5h, furnace cooling, cooling medium air；
(5) machining: roughing, it is thus achieved that coarse part；
(6) modifier treatment: Quenching Treatment, heating furnace is heated to 960-990 DEG C, adds thermal medium nitrogen, temperature retention time 3-3.5h, and oil of quenching is cold；High tempering, temperature is 620～650 DEG C, temper medium air, tempering time 90-120min；
(7) glow discharge nitriding: nitriding temperature 520～580 DEG C, nitriding time 8～12h, gas pressure 130～560Pa, heating voltage 650～750V；
(8) machining: part is carried out retrofit, the roughness of the locating ring after processing is Ra < 0.8 μm；
(9) inspection warehouse-in: first clean after burr, then check warehouse-in.
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 locating ring processing technique, it is characterised in that this processing technique comprises the following steps:
(1) technological process: blanking → forging → annealing → machining → quenched → machining → glow discharge nitriding → inspection → finished product；
(2) selection: select 38CrMnAl steel；
(3) forging: heating-up temperature 1100～1150 DEG C, initial forging temperature 1150～1250 DEG C, final forging temperature ＞ 880 DEG C；
(4) annealing: heat with furnace temperature, heating-up temperature 940-980 DEG C, temperature retention time 2-2.5h, furnace cooling, cooling medium air；
(5) machining: roughing, it is thus achieved that coarse part；
(6) modifier treatment: Quenching Treatment, heating furnace is heated to 960-990 DEG C, adds thermal medium nitrogen, temperature retention time 3-3.5h, and oil of quenching is cold；High tempering, temperature is 620～650 DEG C, temper medium air, tempering time 90-120min；
(7) glow discharge nitriding: nitriding temperature 520～580 DEG C, nitriding time 8～12h, gas pressure 130～560Pa, heating voltage 650～750V；
(8) machining: part is carried out retrofit, the roughness of the locating ring after processing is Ra < 0.8 μm；
(9) inspection warehouse-in: first clean after burr, then check warehouse-in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510047039.3A CN105983818A (en) | 2015-01-30 | 2015-01-30 | Technology for machining positioning rings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510047039.3A CN105983818A (en) | 2015-01-30 | 2015-01-30 | Technology for machining positioning rings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105983818A true CN105983818A (en) | 2016-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510047039.3A Pending CN105983818A (en) | 2015-01-30 | 2015-01-30 | Technology for machining positioning rings |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108148991A (en) * | 2016-12-06 | 2018-06-12 | 新昌县嘉德科技发展有限公司 | A kind of processing technology of axis pin |
| CN109290162A (en) * | 2018-11-05 | 2019-02-01 | 张盼 | A kind of wear-resisting oscillation ring and preparation method thereof for pneumatic high-frequency excitation equipment |
| CN110682065A (en) * | 2019-11-06 | 2020-01-14 | 江阴市恒润重工股份有限公司 | Method for processing high-temperature-resistant ring piece for steam turbine |
| CN111015124A (en) * | 2019-12-30 | 2020-04-17 | 广州梅隆金属制品有限公司 | Structural member for 5G signal transmitting tower and forging method thereof |
-
2015
- 2015-01-30 CN CN201510047039.3A patent/CN105983818A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108148991A (en) * | 2016-12-06 | 2018-06-12 | 新昌县嘉德科技发展有限公司 | A kind of processing technology of axis pin |
| CN109290162A (en) * | 2018-11-05 | 2019-02-01 | 张盼 | A kind of wear-resisting oscillation ring and preparation method thereof for pneumatic high-frequency excitation equipment |
| CN110682065A (en) * | 2019-11-06 | 2020-01-14 | 江阴市恒润重工股份有限公司 | Method for processing high-temperature-resistant ring piece for steam turbine |
| CN111015124A (en) * | 2019-12-30 | 2020-04-17 | 广州梅隆金属制品有限公司 | Structural member for 5G signal transmitting tower and forging method thereof |
| CN111015124B (en) * | 2019-12-30 | 2021-08-13 | 广州梅隆金属制品有限公司 | Structural member for 5G signal transmitting tower and forging method thereof |
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Application publication date: 20161005 |
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| WD01 | Invention patent application deemed withdrawn after publication |