CN106563927A - Machining technique for boriding bearing cylinder roller - Google Patents

Machining technique for boriding bearing cylinder roller Download PDF

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Publication number
CN106563927A
CN106563927A CN201610984571.2A CN201610984571A CN106563927A CN 106563927 A CN106563927 A CN 106563927A CN 201610984571 A CN201610984571 A CN 201610984571A CN 106563927 A CN106563927 A CN 106563927A
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CN
China
Prior art keywords
cooled
product
boriding
car
bearing cylinder
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.)
Pending
Application number
CN201610984571.2A
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Chinese (zh)
Inventor
郑小平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ANHUI QIANXI PRECISE BEARING MANUFACTURING Co Ltd
Original Assignee
ANHUI QIANXI PRECISE BEARING MANUFACTURING Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ANHUI QIANXI PRECISE BEARING MANUFACTURING Co Ltd filed Critical ANHUI QIANXI PRECISE BEARING MANUFACTURING Co Ltd
Priority to CN201610984571.2A priority Critical patent/CN106563927A/en
Publication of CN106563927A publication Critical patent/CN106563927A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/003—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/34—Rollers; Needles

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

The invention discloses a machining technique for a boriding bearing cylinder roller. The machining technique comprises the following steps that the boriding bearing cylinder roller comprises, by weight, 0.95-1.05% of C, 0.20-0.40% of Mn, 0.15-0.35% of Si, S, B, P, 1.30-1.65% of Cr, and inevitable impurities, wherein the ratio of S to B is 0.020, and the ratio of P to B is 0.027; and boron elements permeate into materials in the heat treatment procedure, and a Fe2B layer with the hardness being 1200-1500HV is formed on the surface of a product, so that abrasive resistance of the product is improved, the product also has corrosion resistance, the service life of the product is prolonged, and the application range is wide.

Description

A kind of boronising bearing roller processing technology
Technical field
The present invention relates to a kind of boronising bearing roller processing technology.
Background technology
Bearing roller is the strength member that circle leans on bearing, and its material is by carbon structure Jing carburizings or carburizing , to obtain preferable wearability and life-span, part occasion uses ceramic material, and heavy load rotor is easily rupturable, has a strong impact on The life and reliability of bearing.
The content of the invention
The present invention provides a kind of boronising bearing roller processing technology so as to beneficial to large batch of industrialized production, The mechanical property of product further improves, and improves the wearability and corrosion resistance of product, and life of product improves 2-3 times.
Technical scheme is as follows：
A kind of boronising bearing roller processing technology, comprises the following steps:
A, forge
Chemical component weight percentage is in forging embryo:C：0.95-1.05Mn：0.20-0.40Si：0.15-0.35S：B；= 0.020P:B；=0.027Cr:1.30-1.65 is heated to 600-700 DEG C, is forged, and is again heated to 500-800 DEG C, is incubated 5- 7 hours, 300 DEG C are cooled to 22 DEG C/h, then with 20 DEG C/h, are cooled to normal temperature；
B, smart car
Forging embryo car is cylindrical to stay 0.1mm surpluses to size, and surface of the work is machined to into Ra0.4. with vibration headstock
C, Bononizing pretreatment；
Car embryo is put with 20%-30% ferro-borons, the boriding medium 5-6kg of AL2O360%-70%, KBF15%, NH1HCO3 5%. Enter heat-treatment production line, temperature rises to 950-1300 DEG C, is incubated 4.5-5 hours, and with 22 DEG C/h 350 DEG C are cooled to, then with stove Chamber naturally cools to normal temperature.
D, centreless grinding
Product is ground to needs size, below fineness R0.1, and by piece packaging.
The present invention when using, it is only necessary to the composition of appropriate adjustment boronising, can obtain wear-resisting and not by above technical scheme The Fe2B phase surface layers for coming off, boronising thickness can reach 0.05～0.mm, and core hardness can be controlled in HRC22-30, with harder Surface have higher sword again, case hardness reaches 1200-1500HV, compared with carburizing cylindrical roller improve 30%, part is used Life-span improves 2-3 times, the good effect highly significant that the bulk life time to improving bearing is produced.
Specific embodiment：
A kind of boronising bearing roller processing technology, comprises the following steps:
A, forge
Chemical component weight percentage is in forging embryo:C：0.95-1.Mn：0.25-0.35Si：0.2-0.35S：B；= 0.020P:B；=0.027Cr:1.40-1.60 is heated to 650-700 DEG C, is forged, and is again heated to 600-800 DEG C, insulation 6.5 hours, 300 DEG C are cooled to 22 DEG C/h, then with 20 DEG C/h, are cooled to normal temperature；
B, smart car
Forging embryo car is cylindrical to stay 0.12mm surpluses to size, and surface of the work is machined to into Ra0.38 with vibration headstock
C, Bononizing pretreatment；
Car embryo is put with 25%-30% ferro-borons, the boriding medium 5.4kg of AL2O362%-68%, KBF15%, NH1HCO3 5%. Enter heat-treatment production line, temperature rises to 950-1200 DEG C, is incubated 4.5-5 hours, and with 22 DEG C/h 350 DEG C are cooled to, then with stove Chamber naturally cools to normal temperature.
D, centreless grinding
Product is ground to needs size, below fineness R0.09, and by piece packaging.The present invention passes through above technology Scheme, when using, it is only necessary to the composition of appropriate adjustment boronising, can obtain wear-resisting and adeciduate Fe2B phase surface layers, and boronising is thick Degree can reach 0.05～0.mm, and core hardness can be controlled in HRC22-30, has higher sword, surface again with harder surface Hardness reaches 1200-1500HV, and compared with carburizing cylindrical roller 30% is improved, and part service life improves 2-3 times, to improving bearing The good effect highly significant that bulk life time is produced.
Above example only to illustrate this technical scheme, rather than a limitation；Although with reference to the foregoing embodiments to this It has been described in detail, it will be understood by those within the art that：It still can be to described in foregoing embodiments Technical scheme modify, or equivalent is carried out to which part technical characteristic；And these modifications or replacement, not The essence for making appropriate technical solution departs from the spirit and scope of this each embodiment technical scheme.

Claims (1)

1. a kind of boronising bearing roller processing technology, it is characterised in that, comprise the following steps:
A, forge：Chemical component weight percentage is in forging embryo:C：0.95-1.05、Mn：0.20-0.40、Si：0.15-0.35、 S：B；=0.020, P:B；=0.027Cr:1.30-1.65 is heated to 600-700 DEG C, is forged, and is again heated to 500-800 DEG C, 5-7 hours are incubated, 300 DEG C are cooled to 22 DEG C/h, then with 20 DEG C/h, it is cooled to normal temperature；
B, smart car：
Forging embryo car is cylindrical to stay 0.1mm surpluses to size, and surface of the work is machined to into Ra0.4 with vibration headstock；
C, Bononizing pretreatment：
Car embryo and 20%-30% ferro-borons, AL2O360%-70%, KBF15%, NH1HCO35%. boriding medium 5-6kg are put into hot place Reason production line, temperature rises to 950-1300 DEG C, is incubated 4.5-5 hours, and with 22 DEG C/h 350 DEG C are cooled to, then with furnace chamber nature It is cooled to normal temperature；
D, centreless grinding：
Product is ground to needs size, below fineness R0.1, and by piece packaging.
CN201610984571.2A 2016-11-09 2016-11-09 Machining technique for boriding bearing cylinder roller Pending CN106563927A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610984571.2A CN106563927A (en) 2016-11-09 2016-11-09 Machining technique for boriding bearing cylinder roller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610984571.2A CN106563927A (en) 2016-11-09 2016-11-09 Machining technique for boriding bearing cylinder roller

Publications (1)

Publication Number Publication Date
CN106563927A true CN106563927A (en) 2017-04-19

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610984571.2A Pending CN106563927A (en) 2016-11-09 2016-11-09 Machining technique for boriding bearing cylinder roller

Country Status (1)

Country Link
CN (1) CN106563927A (en)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN85100597A (en) * 1985-04-01 1986-08-20 兰州大学 Boronization in solid-gas phase
CN86108744A (en) * 1986-12-17 1988-06-29 贵州工学院 Paste boron-doping agent and protective cover thereof
US20100018611A1 (en) * 2008-06-05 2010-01-28 Uchicago Argonne Llc Ultra-fast boriding of metal surfaces for improved properties
CN102605256A (en) * 2012-04-12 2012-07-25 重庆材料研究院 Rare-earth-doped bearing steel and preparation method thereof
CN102922237A (en) * 2012-11-05 2013-02-13 大连东信大型轴承滚子有限公司 Technology for processing spherical roller of extra large size bearing
CN103205641A (en) * 2013-02-04 2013-07-17 繁昌县琪鑫铸造有限公司 Preparation method for high-strength foundation bolt
CN103557235A (en) * 2013-10-12 2014-02-05 王天波 Manufacturing method for bearing roller needle
CN104097032A (en) * 2014-06-26 2014-10-15 庹汉彪 Bearing needle forming process
CN104191170A (en) * 2014-08-15 2014-12-10 浙江环宇轴承有限公司 Production process for conical roller bearing
CN104439954A (en) * 2014-11-17 2015-03-25 无锡市百顺机械厂 Bearing machining technology

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN85100597A (en) * 1985-04-01 1986-08-20 兰州大学 Boronization in solid-gas phase
CN86108744A (en) * 1986-12-17 1988-06-29 贵州工学院 Paste boron-doping agent and protective cover thereof
US20100018611A1 (en) * 2008-06-05 2010-01-28 Uchicago Argonne Llc Ultra-fast boriding of metal surfaces for improved properties
CN102605256A (en) * 2012-04-12 2012-07-25 重庆材料研究院 Rare-earth-doped bearing steel and preparation method thereof
CN102922237A (en) * 2012-11-05 2013-02-13 大连东信大型轴承滚子有限公司 Technology for processing spherical roller of extra large size bearing
CN103205641A (en) * 2013-02-04 2013-07-17 繁昌县琪鑫铸造有限公司 Preparation method for high-strength foundation bolt
CN103557235A (en) * 2013-10-12 2014-02-05 王天波 Manufacturing method for bearing roller needle
CN104097032A (en) * 2014-06-26 2014-10-15 庹汉彪 Bearing needle forming process
CN104191170A (en) * 2014-08-15 2014-12-10 浙江环宇轴承有限公司 Production process for conical roller bearing
CN104439954A (en) * 2014-11-17 2015-03-25 无锡市百顺机械厂 Bearing machining technology

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Application publication date: 20170419