CN101928913B - Production technology of high-strength cast product - Google Patents

Production technology of high-strength cast product Download PDF

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Publication number
CN101928913B
CN101928913B CN 200910065250 CN200910065250A CN101928913B CN 101928913 B CN101928913 B CN 101928913B CN 200910065250 CN200910065250 CN 200910065250 CN 200910065250 A CN200910065250 A CN 200910065250A CN 101928913 B CN101928913 B CN 101928913B
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CN
China
Prior art keywords
carburization
cast product
carburizing
oil dripping
dripping amount
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 200910065250
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Chinese (zh)
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CN101928913A (en
Inventor
李新民
吕长福
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Henan Hang Zhi Patent Services Co Ltd
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NANYANG XINGZHI PATEN TECHNOLOGY SERVICE Co Ltd
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Priority to CN 200910065250 priority Critical patent/CN101928913B/en
Publication of CN101928913A publication Critical patent/CN101928913A/en
Application granted granted Critical
Publication of CN101928913B publication Critical patent/CN101928913B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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.Be also to make the workpiece of soft steel there is the upper layer of high carbon steel, then, through quenching and low-temperaturetempering, make the upper layer of workpiece there is high rigidity and wear resistance, and the centre portions of workpiece still keeping toughness and the plasticity of soft steel.The material of carburized workpiece is generally soft steel or low-carbon alloy steel, and after carburizing, the chemical composition of steel piece surface can approach high carbon steel.Also will be through quenching after workpiece carbonization, to obtain high surface hardness, high wear resistance and fatigue resistance, and keep heart section that the 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 carburization process.Conventional carburization process is as follows: will need the workpiece of carburizing to put in cementing furnace and heat, when the cementing furnace temperature reaches 800 ℃, the oil dripping amount be 80-100 drip/minute, with stopwatch, calculate, drip 2 hours.Reheat afterwards while making furnace temperature be raised to 860 ℃ and be incubated 4 hours, in these 4 hours, the oil dripping amount rises to 150～170 droplets/minute.Continue to heat while making furnace temperature be raised to 925 ± 5 ℃ (design temperature), start insulation, oil mass is with 150～170 droplets/minute speed oil drippings, and soaking time is 3 hours.Generally, within the cementation zone of workpiece can reach 1.1～1.4mm scope, start 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, and cost is high.
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, comprise carburization step, and the technique of described carburizing is as follows:
A. will need the workpiece of carburizing to put in cementing furnace and heat, when the cementing furnace temperature reaches 800 ℃, the oil dripping amount is 80～100 droplets/minute, with stopwatch, calculates, and drips 2 hours;
B. after, reheat while making furnace temperature be raised to 850 ℃, the oil dripping amount is 230～240 droplets/minute, drips 1 hour;
While c. continuing to be warmed up to 880 ℃, keep the oil dripping amount constant, drip 1 hour;
When d. furnace temperature is raised to 925 ± 5 ℃, keep the oil dripping amount constant, start insulation, 3 hours.
The present invention is by improving carburizing temperature, and the oil dripping amount while strengthening carburizing, make and can effectively improve the speed of carburizing, make foundry goods reach the requirement of carburizing within the short as far as possible time, 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, comprise carburization step, and the technique of described carburizing is as follows:
A. will need the workpiece of carburizing to put in cementing furnace and heat, when the cementing furnace temperature reaches 800 ℃, the oil dripping amount is 80～100 droplets/minute, with stopwatch, calculates, and drips 2 hours;
B. after, reheat while making furnace temperature be raised to 850 ℃, the oil dripping amount is 230～240 droplets/minute, drips 1 hour;
While c. continuing to be warmed up to 880 ℃, keep the oil dripping amount constant, drip 1 hour;
When d. furnace temperature is raised to 925 ± 5 ℃, keep the oil dripping amount constant, start insulation, 3 hours.
The present invention is by improving carburizing temperature, and the oil dripping amount while strengthening carburizing, make and can effectively improve the speed of carburizing, make foundry goods reach the requirement of carburizing within the short as far as possible time, 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, comprise carburization step, it is characterized in that, the technique of described carburizing is as follows:
A. will need the workpiece of carburizing to put in cementing furnace and heat, when the cementing furnace temperature reaches 800 ℃, the oil dripping amount is 80～100 droplets/minute, with stopwatch, calculates, and drips 2 hours;
B. after, reheat while making furnace temperature be raised to 850 ℃, the oil dripping amount is 230～240 droplets/minute, drips 1 hour;
While c. continuing to be warmed up to 880 ℃, keep the oil dripping amount constant, drip 1 hour;
When d. furnace temperature is raised to 925 ± 5 ℃, keep the oil dripping amount constant, start 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 CN101928913A (en) 2010-12-29
CN101928913B true CN101928913B (en) 2013-12-25

Family

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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)

Country Link
CN (1) CN101928913B (en)

Citations (1)

* 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

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4853366B2 (en) * 2007-04-13 2012-01-11 住友金属工業株式会社 Steel carburized or carbonitrided parts with shot peening

Patent Citations (1)

* 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

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
JP特开2008-261037A 2008.10.30
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.井式炉滴注式气体渗碳.《热处理工艺学（初级本）》.科学普及出版社,1983,(第1版),122-123. *

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