CN101928913A - Production technology of high-strength cast product - Google Patents

Production technology of high-strength cast product Download PDF

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Publication number
CN101928913A
CN101928913A CN2009100652502A CN200910065250A CN101928913A CN 101928913 A CN101928913 A CN 101928913A CN 2009100652502 A CN2009100652502 A CN 2009100652502A CN 200910065250 A CN200910065250 A CN 200910065250A CN 101928913 A CN101928913 A CN 101928913A
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CN
China
Prior art keywords
carburization
cast product
carburizing
oil dripping
dripping amount
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Application number
CN2009100652502A
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Chinese (zh)
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CN101928913B (en
Inventor
李新民
吕长福
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Henan Hang Zhi Patent Services Co Ltd
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XICHUAN HUAXIN FOUNDRY CO Ltd
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Priority to CN 200910065250 priority Critical patent/CN101928913B/en
Publication of CN101928913A publication Critical patent/CN101928913A/en
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Publication of CN101928913B publication Critical patent/CN101928913B/en
Expired - Fee Related legal-status Critical Current
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Abstract

The invention discloses a production technology of a high-strength cast product, comprising a carburization procedure. In the invention, carburization speed can be effectively improved by raising carburization temperature and increasing oil drip quantity in the process of carburization, so that the cast product can reach carburization requirements in the shortest possible time, thus the improving efficiency, shortening the carburization time and providing guarantees for the cast product to enter the next process and reducing production cost. In addition, the carburization layer of the cast product can reach a thickness of 1.1-1.4mm.

Description

A kind of production technique of high strength casting
Technical field
The invention belongs to the metalworking technical field, be specifically related to a kind of production technique of high strength casting.
Background technology
Carburizing is to instigate carbon atom to penetrate into the process of steel upper layer.Also be to make the workpiece of soft steel have the upper layer of high carbon steel, through quenching and low-temperaturetempering, make the upper layer of workpiece have high rigidity and wear resistance, and the centre portions of workpiece still keeping the toughness and the plasticity of soft steel again.The material of carburized workpiece is generally soft steel or low-carbon alloy steel, and after the carburizing, the chemical ingredients of steel piece surface can be near high carbon steel.Also will be through quenching behind the workpiece carbonization, obtaining high surface hardness, high wear resistance and fatigue resistance, and keep heart portion that obdurability after soft steel quenches is arranged, make the workpiece load that can withstand shocks.At present, in actual production, the production technique of high strength casting, most all is embodied on the carburization process.Conventional carburization process is as follows: will need the workpiece of carburizing to put in the cementing furnace and heat, when the cementing furnace temperature reaches 800 ℃, the oil dripping amount be 80-100 drip/minute, calculate with stopwatch, dripped 2 hours.Insulation was 4 hours when reheat made furnace temperature be raised to 860 ℃ afterwards, and in these 4 hours, the oil dripping amount rises to 150～170 droplets/minute.Continue to heat when making furnace temperature be raised to 925 ± 5 ℃ (design temperature), begin insulation, oil mass is with 150～170 droplets/minute speed oil drippings, and soaking time is 3 hours.Generally speaking, the cementation zone of workpiece can reach within 1.1～1.4mm scope, begins to come out of the stove.Need 0.5～1 hour when be warmed up to 800 ℃ early stage, amounting to carburizing time is 9.5～10 hours.Production efficiency is lower, the cost height.
Summary of the invention
The invention provides a kind of production technique of the high strength casting that can effectively increase work efficiency.
A kind of production technique of high strength casting comprises carburization step, and the technology of described carburizing is as follows:
A. will need the workpiece of carburizing to put in the cementing furnace and heat, when the cementing furnace temperature reached 800 ℃, the oil dripping amount was 80～100 droplets/minute, calculated with stopwatch, dripped 2 hours;
When reheat made furnace temperature be raised to 850 ℃ b., the oil dripping amount was 230～240 droplets/minute, dripped 1 hour;
When c. continuing to be warmed up to 880 ℃, keep the oil dripping amount constant, dripped 1 hour;
When d. furnace temperature is raised to 925 ± 5 ℃, keep the oil dripping amount constant, begin insulation, 3 hours.
The present invention is by improving carburizing temperature, and the oil dripping amount when strengthening carburizing, make and to improve the speed of carburizing effectively, make foundry goods in the short as far as possible time, reach the requirement of carburizing, the cementation zone of workpiece reaches 1.1～1.4mm, has improved working efficiency, has shortened carburizing time, provide guarantee for high strength casting enters next process, reduced production cost.
Embodiment
The invention provides a kind of production technique of the high strength casting that can effectively increase work efficiency.
A kind of production technique of high strength casting comprises carburization step, and the technology of described carburizing is as follows:
A. will need the workpiece of carburizing to put in the cementing furnace and heat, when the cementing furnace temperature reached 800 ℃, the oil dripping amount was 80～100 droplets/minute, calculated with stopwatch, dripped 2 hours;
When reheat made furnace temperature be raised to 850 ℃ b., the oil dripping amount was 230～240 droplets/minute, dripped 1 hour;
When c. continuing to be warmed up to 880 ℃, keep the oil dripping amount constant, dripped 1 hour;
When d. furnace temperature is raised to 925 ± 5 ℃, keep the oil dripping amount constant, begin insulation, 3 hours.
The present invention is by improving carburizing temperature, and the oil dripping amount when strengthening carburizing, make and to improve the speed of carburizing effectively, make foundry goods in the short as far as possible time, reach the requirement of carburizing, the cementation zone of workpiece reaches 1.1～1.4mm, has improved working efficiency, has shortened carburizing time, provide guarantee for high strength casting enters next process, reduced production cost.

Claims (1)

1. the production technique of a high strength casting comprises carburization step, it is characterized in that, the technology of described carburizing is as follows:
A. will need the workpiece of carburizing to put in the cementing furnace and heat, when the cementing furnace temperature reached 800 ℃, the oil dripping amount was 80～100 droplets/minute, calculated with stopwatch, dripped 2 hours;
When reheat made furnace temperature be raised to 850 ℃ b., the oil dripping amount was 230～240 droplets/minute, dripped 1 hour;
When c. continuing to be warmed up to 880 ℃, keep the oil dripping amount constant, dripped 1 hour;
When d. furnace temperature is raised to 925 ± 5 ℃, keep the oil dripping amount constant, begin insulation, 3 hours.
CN 200910065250 2009-06-23 2009-06-23 Production technology of high-strength cast product Expired - Fee Related CN101928913B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200910065250 CN101928913B (en) 2009-06-23 2009-06-23 Production technology of high-strength cast product

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200910065250 CN101928913B (en) 2009-06-23 2009-06-23 Production technology of high-strength cast product

Publications (2)

Publication Number Publication Date
CN101928913A true CN101928913A (en) 2010-12-29
CN101928913B CN101928913B (en) 2013-12-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200910065250 Expired - Fee Related CN101928913B (en) 2009-06-23 2009-06-23 Production technology of high-strength cast product

Country Status (1)

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CN (1) CN101928913B (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1624189A (en) * 2004-12-13 2005-06-08 中原工学院 Whole process variable pressure controlled carburation method
JP2008261037A (en) * 2007-04-13 2008-10-30 Sumitomo Metal Ind Ltd Carburized component or carbonitrided component made of steel and subjected to shot peening

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1624189A (en) * 2004-12-13 2005-06-08 中原工学院 Whole process variable pressure controlled carburation method
JP2008261037A (en) * 2007-04-13 2008-10-30 Sumitomo Metal Ind Ltd Carburized component or carbonitrided component made of steel and subjected to shot peening

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
中华人民共和国第一机械工业部统编机械工人技术培训教材: "《热处理工艺学（初级本）》", 31 January 1983, 科学普及出版社 *

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