CN104233319A - Method for increasing carburizing and quenching hardness of chrome-nickel steel material - Google Patents
Method for increasing carburizing and quenching hardness of chrome-nickel steel material Download PDFInfo
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- CN104233319A CN104233319A CN201410530398.XA CN201410530398A CN104233319A CN 104233319 A CN104233319 A CN 104233319A CN 201410530398 A CN201410530398 A CN 201410530398A CN 104233319 A CN104233319 A CN 104233319A
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Abstract
The invention relates to a method for increasing carburizing and quenching hardness of a chrome-nickel steel material. The method includes the following steps of (1) normalizing and tempering, (2) carburization, (3) high-temperature tempering, (4) quenching, (5) cold treatment and (6) tempering, the step (3) includes that a carburized chrome-nickel steel material workpiece is enabled to enter a tempering furnace to be subjected to high-temperature tempering treatment, and the step (5) includes that the chrome-nickel steel material workpiece is put in a freezer to be subjected to cold treatment, the cold treatment temperature is (-70 DEG C) +/-10 DEG C, and when the chrome-nickel steel material workpiece is completely cooled to the cold treatment temperature, the temperature is kept for 2-3 hours. According to the method for increasing carburizing and quenching hardness of the chrome-nickel steel material, high-temperature tempering is added one time after carburization, cold treatment is added one time after quenching, thereby, content of retained austenite in steel is reduced, and hardness of the chrome-nickel steel material workpiece after carburizing and quenching is improved.
Description
Technical field
The present invention relates to Field of Heat-treatment, particularly relate to a kind of chromium nickel steel material carburizing and quenching technique.
Background technology
Large-tonnage electric power wheel self-discharging vehicle train of wheels comprises major planets wheel, asteroid wheel and sun gear, because service condition is severe, its service requirements must have good surface abrasion resistance, fatigue resistance and anti-seizing property, particularly requires to have higher low-temperature impact property.The existing carburizing quenching process of chromium nickel steel material is: normalizing-tempering-carburizing and quenching-tempering, and its surface hardness, mostly at HRC56 ~ HRC58, cannot meet the technical requirements HRC58 ~ HRC 62 of drawing, gear wear is caused to be accelerated, change frequent, work-ing life reduces greatly, and running cost is high.
Summary of the invention
The object of the invention is to overcome above defect, a kind of processing method improving chromium nickel steel material carburizing and quenching hardness is provided, makes the hardness value of the gear of chromium nickel steel material reach HRC58 ~ HRC62.
Technical scheme of the present invention is, a kind of processing method improving chromium nickel steel material carburizing and quenching hardness, and it comprises the following steps:
Step 1, normalizing, tempering, chromium nickel steel material work piece, after roughing, carries out a normalizing and adds temper, precision work after air cooling of coming out of the stove after tempering;
Step 2, carburizing, by the carburizing of accurately machined chromium nickel steel material work piece, air cooling of coming out of the stove;
Step 3, high tempering, by the chromium nickel steel material work piece after carburizing, enter tempering stove, carry out high tempering process, high tempering temperature is 660 DEG C ± 10 DEG C, the high tempering time is T hour, the high tempering time is T hour, T=α KD, and wherein α is chromium nickel steel heating materials coefficient, K is shove charge coefficient, and D is the net thickness of workpiece;
Step 4, quenching, enter quenching furnance quenching by the chromium nickel steel material work piece after high tempering;
Step 5, deepfreeze, put into refrigerated tank deepfreeze by chromium nickel steel material work piece, and deepfreeze temperature is-70 DEG C ± 10 DEG C, is cooled to completely after deepfreeze temperature is incubated 2 ~ 3 hours until chromium nickel steel material work piece;
Step 6, tempering, put into tempering stove tempering by chromium nickel steel material work piece.
Beneficial effect of the present invention is, a high tempering is increased after carburizing, after increasing a deepfreeze after quenching, its effect is the content reducing residual austenite in steel, make the hardness of chromium nickel steel material work piece bring up to HRC58 ~ HRC 62 by HRC56, improve the hardness after chromium nickel steel material work piece carburizing and quenching, make it have high wear resistance, anti-fatigue performance, anti-seizing property and higher low-temperature impact property, improve the work-ing life of workpiece, reduce running cost.
Embodiment
Below by embodiment, technical scheme of the present invention is described in further detail.
Improve a processing method for chromium nickel steel material gear carburizing quenching hardness, it comprises the following steps:
Step 1, normalizing, tempering, chromium nickel steel material gear, after roughing, carries out a normalizing and adds temper, and normalizing temperature is 950 DEG C ± 10 DEG C, the normalizing time is 2 ~ 4 hours, coming out of the stove after normalizing air cooling, is keep speed of cooling homogeneity, the dispersion of chromium nickel steel material gear will be put during air cooling, then tempering is carried out, tempering temperature is 620 DEG C ± 10 DEG C, and tempering time is 3 ~ 5 hours, air cooling of coming out of the stove after tempering;
Step 2, carburizing, described carburization step is divided into following four operations:
Step 2-1, exhaust cycle, heat up after chromium nickel steel material gear enters stove, and instill kerosene and methyl alcohol in stove, and when working temperature in stove reaches 920 DEG C ± 10 DEG C, and when carbon potential reaches 0.5 carbon equivalent, exhaust cycle terminates, and closes venting hole;
Step 2-2, swash and ooze the phase, swash that to ooze the temperature of phase be 920 DEG C ± 10 DEG C, carbon-potential control, in 1.2 ~ 1.4 carbon equivalents, when depth of penetration reaches 75% ~ 85% of chromium nickel steel material gear total depth, swashs the phase of oozing and terminates;
Step 2-3, diffusion period, the temperature of diffusion period is 920 DEG C ± 10 DEG C, and carbon-potential control is in 1.1 ~ 1.3 carbon equivalents, and when depth of penetration reaches 85% ~ 95% of chromium nickel steel material gear wheel carburization total depth, diffusion period terminates;
Step 2-4, cooldown period, temperature drops to 880 DEG C ± 10 DEG C, and carbon-potential control, in 1.1 ~ 1.2 carbon equivalents, is incubated after 50 ~ 60 minutes, air cooling of coming out of the stove;
Step 3, high tempering, by the chromium nickel steel material gear after carburizing, enter tempering stove, carry out high tempering process, and high tempering temperature is 660 DEG C ± 10 DEG C, and the high tempering time is T
1hour, high tempering time T
1net thickness according to chromium nickel steel material gear calculates: T
1=α KD, α are heating coefficient, K shove charge coefficient, and D is the net thickness of chromium nickel steel material gear;
Step 4, quenching, by the chromium nickel steel material gear after high tempering, enter quenching furnance, be warming up to 850 DEG C ± 10 DEG C to keep 2 ~ 3 hours, instill kerosene simultaneously, keep carbon potential in 0.5 carbon equivalent, prevent chromium nickel steel material gear oxidation and decarbonization, after insulation terminates, come out of the stove quenching, quenchant is fast quenching oil, ON cycle oil, and the chromium nickel steel material gear that will quench constantly moves 20 minutes in oil, then static until room temperature;
Step 5, deepfreeze, chromium nickel steel material gear is put into refrigerated tank, and deepfreeze temperature is-70 DEG C, is cooled to completely after deepfreeze temperature is incubated 2 ~ 3 hours until chromium nickel steel material gear;
Step 6, tempering, put into tempering stove by chromium nickel steel material gear, and tempering temperature is 200 DEG C ± 10 DEG C, and tempering time is 3.5 ~ 4.5 hours.
Claims (1)
1. improve a processing method for chromium nickel steel material carburizing and quenching hardness, it is characterized in that it comprises the following steps:
Step 1, normalizing, tempering, chromium nickel steel material work piece, after roughing, carries out a normalizing and adds temper, precision work after air cooling of coming out of the stove after tempering;
Step 2, carburizing, by the carburizing of accurately machined chromium nickel steel material work piece, air cooling of coming out of the stove;
Step 3, high tempering, by the chromium nickel steel material work piece after carburizing, enter tempering stove, carry out high tempering process, high tempering temperature is 660 DEG C ± 10 DEG C, and the high tempering time is T hour, T=α KD, wherein α is chromium nickel steel heating materials coefficient, and K is shove charge coefficient, and D is the net thickness of workpiece;
Step 4, quenching, enter quenching furnance quenching by the chromium nickel steel material work piece after high tempering;
Step 5, deepfreeze, put into refrigerated tank deepfreeze by chromium nickel steel material work piece, and deepfreeze temperature is-70 DEG C ± 10 DEG C, is cooled to completely after deepfreeze temperature is incubated 2 ~ 3 hours until chromium nickel steel material work piece;
Step 6, tempering, put into tempering stove tempering by chromium nickel steel material work piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410530398.XA CN104233319A (en) | 2014-10-10 | 2014-10-10 | Method for increasing carburizing and quenching hardness of chrome-nickel steel material |
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| CN201410530398.XA CN104233319A (en) | 2014-10-10 | 2014-10-10 | Method for increasing carburizing and quenching hardness of chrome-nickel steel material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106222370A (en) * | 2016-08-31 | 2016-12-14 | 广西盛隆冶金有限公司 | The method improving chrome-nickel steel material carburizing and quenching hardness |
| US10077484B2 (en) | 2016-10-28 | 2018-09-18 | Schaeffler Technologies AG & Co. KG | Method for producing a planetary gear shaft having increased hardness |
| CN109182896A (en) * | 2018-08-24 | 2019-01-11 | 中石化四机石油机械有限公司 | A kind of 175MPa movable elbow material and heat treatment process |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101139692A (en) * | 2007-09-28 | 2008-03-12 | 四川航空液压机械厂 | Martensitic stainless steel cementation method and product thereof |
| US20090050241A1 (en) * | 2002-11-15 | 2009-02-26 | Nippon Steel Corporation | Steel superior in machinability and method of production of same |
| CN102837165A (en) * | 2012-09-27 | 2012-12-26 | 常熟天地煤机装备有限公司 | Manufacturing method for final-stage driving gear of high-power coal mining machine |
-
2014
- 2014-10-10 CN CN201410530398.XA patent/CN104233319A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090050241A1 (en) * | 2002-11-15 | 2009-02-26 | Nippon Steel Corporation | Steel superior in machinability and method of production of same |
| CN101139692A (en) * | 2007-09-28 | 2008-03-12 | 四川航空液压机械厂 | Martensitic stainless steel cementation method and product thereof |
| CN102837165A (en) * | 2012-09-27 | 2012-12-26 | 常熟天地煤机装备有限公司 | Manufacturing method for final-stage driving gear of high-power coal mining machine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106222370A (en) * | 2016-08-31 | 2016-12-14 | 广西盛隆冶金有限公司 | The method improving chrome-nickel steel material carburizing and quenching hardness |
| US10077484B2 (en) | 2016-10-28 | 2018-09-18 | Schaeffler Technologies AG & Co. KG | Method for producing a planetary gear shaft having increased hardness |
| CN109182896A (en) * | 2018-08-24 | 2019-01-11 | 中石化四机石油机械有限公司 | A kind of 175MPa movable elbow material and heat treatment process |
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Application publication date: 20141224 |