CN103774083A - Direct-quenching shallow layer carburizing method - Google Patents
Direct-quenching shallow layer carburizing method Download PDFInfo
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- CN103774083A CN103774083A CN201210398496.3A CN201210398496A CN103774083A CN 103774083 A CN103774083 A CN 103774083A CN 201210398496 A CN201210398496 A CN 201210398496A CN 103774083 A CN103774083 A CN 103774083A
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- carburizing
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Abstract
A direct-quenching shallow layer carburizing method comprises the following steps: 1, adding a carburizing agent into a carburizing furnace in a dropwise manner at a temperature of 800DEG C to realize air exhaust; 2, heating the furnace to 910DEG C, and carrying out heat insulation for 1h; 3, suspending carburizing parts in the carburizing furnace in a dispersed manner, adding a large amount of the carburizing agent in a dropwise manner to realize rapid air exhaust, and continuously adding the carburizing agent in a dropwise manner to maintain the carbon potential in the furnace being 0.95; 4, carburizing at 910DEG C for 1h; 5, taking out the carburizing parts, placing the carburizing parts in an oil tank, cooling to 50DEG C, taking out the cooled carburizing parts, and cleaning; and 6, tempering at 200DEG C for 2h after cleaning. The method can improve the wear and tensile resistances of the parts, and avoids the surface oxidation and decarburization phenomena caused by secondary quenching and high temperature tempering.
Description
Technical field
The present invention relates to building materials and prefabricated house field, particularly a kind of direct quenching shallow carburization method.
Background technology
Carburizing is the one to metal finishing, what adopt carburizing mostly is soft steel or low alloy steel, concrete grammar is that workpiece is inserted and had in activated carburizing medium, be heated to the single-phase austenitic area of 900--950 degree Celsius, after insulation enough time, make the active atoms of carbon decompositing in carburizing medium infiltrate steel part top layer, thereby obtain top layer high-carbon, heart portion still keeps original composition.It can make the workpiece surface of infiltrate carbon obtain very high hardness, improves its rub proofness.
But existing carburization process is not related to long-pending little, the lightweight parts of injection body, and these parts often need to have stronger wear-resisting and tensile property, and current carburization process cannot satisfy the demands.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of direct quenching shallow carburization method.
To achieve these goals, the technical solution used in the present invention is:
A kind of direct quenching shallow carburization method, comprises the steps:
Step 1 is, at the temperature of 800 ℃, in cementing furnace, to splash into carburizing agent exhaust in furnace temperature;
Step 2, rises to 910 ℃ of insulation 1h by furnace temperature;
Step 3, disperses carburized component to hang in cementing furnace, splashes in a large number the rapid exhaust of carburizing agent, and continues to splash into carbon potential 0.95 in carburizing agent maintenance stove;
Step 4, keeps 910 ℃ of 1h to carry out carburizing;
Step 5, takes out carburized component and inserts in oil groove, while being cooled to 50 ℃, taking out and cleans;
Step 6 is carried out tempering, tempering time 2h at 200 ℃ after cleaning.
Described carburizing agent is aviation kerosene.
The present invention compared with prior art, can improve the wear-resisting and tensile property of parts, surface oxidation and the decarburization phenomenon of having avoided secondary quenching, high tempering to bring simultaneously.
Embodiment
Below in conjunction with embodiment, the present invention is carried out to more detailed explanation.
The present invention is a kind of direct quenching shallow carburization method, comprises the steps:
Step 1 is, at the temperature of 800 ℃, in cementing furnace, to splash into aviation kerosene exhaust in furnace temperature;
Step 2, rises to 910 ℃ of insulation 1h by furnace temperature;
Step 3, disperses carburized component to hang in cementing furnace, splashes in a large number the rapid exhaust of aviation kerosene, and continues to splash into carbon potential 0.95 in carburizing agent maintenance stove;
Step 4, keeps 910 ℃ of 1h to carry out carburizing;
Step 5, takes out carburized component and inserts in oil groove, while being cooled to 50 ℃, taking out and cleans;
Step 6 is carried out tempering, tempering time 2h at 200 ℃ after cleaning.
After above-mentioned thermal treatment, part can reach best intensity and hardness cooperation, and depth of case is 0.20-0.30mm, and piece surface hardness 630-700 HV3, considerably beyond wear resistance requirement.Surface structure is tempered martensite, a small amount of residual austenite and equally distributed carbide, centre hardness is 300-450 HV10, be organized as tempering lath martensite, give full play to the high-strength characteristic of low-alloy low-carbon lath martensite, every stove part all carries out tension test, part stretching result is that longitudinal pulling force is greater than 18 kN, and lateral pull is greater than 20 kN and does not rupture, far away higher than industry standard.
Claims (2)
1. a direct quenching shallow carburization method, is characterized in that, comprises the steps:
Step 1 is, at the temperature of 800 ℃, in cementing furnace, to splash into carburizing agent exhaust in furnace temperature;
Step 2, rises to 910 ℃ of insulation 1h by furnace temperature;
Step 3, disperses carburized component to hang in cementing furnace, splashes in a large number the rapid exhaust of carburizing agent, and continues to splash into carbon potential 0.95 in carburizing agent maintenance stove;
Step 4, keeps 910 ℃ of 1h to carry out carburizing;
Step 5, takes out carburized component and inserts in oil groove, while being cooled to 50 ℃, taking out and cleans;
Step 6 is carried out tempering, tempering time 2h at 200 ℃ after cleaning.
2. a kind of direct quenching shallow carburization method according to claim 1, is characterized in that, described carburizing agent is aviation kerosene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210398496.3A CN103774083A (en) | 2012-10-18 | 2012-10-18 | Direct-quenching shallow layer carburizing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210398496.3A CN103774083A (en) | 2012-10-18 | 2012-10-18 | Direct-quenching shallow layer carburizing method |
Publications (1)
| Publication Number | Publication Date |
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| CN103774083A true CN103774083A (en) | 2014-05-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201210398496.3A Pending CN103774083A (en) | 2012-10-18 | 2012-10-18 | Direct-quenching shallow layer carburizing method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105543770A (en) * | 2015-12-22 | 2016-05-04 | 湖北鄂瑞孚截齿钻具科技有限公司 | Surface treatment technique for cutting pick |
| CN105603161A (en) * | 2016-01-20 | 2016-05-25 | 浙江海洋学院 | Process for hardening and tempering marine nodular cast iron crankshafts |
| CN105779930A (en) * | 2016-05-18 | 2016-07-20 | 大连东非特钢制品有限公司 | Carburization and hardening and tempering synchronous technology of alloyed tool steel SKD61 |
| CN108504986A (en) * | 2018-04-25 | 2018-09-07 | 山东东阿鑫星钢球股份有限公司 | A kind of nonstandard steel ball carburization process of welding |
-
2012
- 2012-10-18 CN CN201210398496.3A patent/CN103774083A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105543770A (en) * | 2015-12-22 | 2016-05-04 | 湖北鄂瑞孚截齿钻具科技有限公司 | Surface treatment technique for cutting pick |
| CN105603161A (en) * | 2016-01-20 | 2016-05-25 | 浙江海洋学院 | Process for hardening and tempering marine nodular cast iron crankshafts |
| CN105779930A (en) * | 2016-05-18 | 2016-07-20 | 大连东非特钢制品有限公司 | Carburization and hardening and tempering synchronous technology of alloyed tool steel SKD61 |
| CN105779930B (en) * | 2016-05-18 | 2018-07-03 | 大连东非特钢制品有限公司 | The quenched synchronous process of alloy tool steel SKD61 carburizings |
| CN108504986A (en) * | 2018-04-25 | 2018-09-07 | 山东东阿鑫星钢球股份有限公司 | A kind of nonstandard steel ball carburization process of welding |
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Application publication date: 20140507 |