CN105695720A - Heat treatment process for supporting wheel - Google Patents

Heat treatment process for supporting wheel Download PDF

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Publication number
CN105695720A
CN105695720A CN201410701471.5A CN201410701471A CN105695720A CN 105695720 A CN105695720 A CN 105695720A CN 201410701471 A CN201410701471 A CN 201410701471A CN 105695720 A CN105695720 A CN 105695720A
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CN
China
Prior art keywords
heat treatment
time
tempering
wheel
hardness
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
CN201410701471.5A
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Chinese (zh)
Inventor
何永金
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.)
CHONGQING YIMAN ENVIRONMENTAL PROTECTION EQUIPMENT Co Ltd
Original Assignee
CHONGQING YIMAN ENVIRONMENTAL PROTECTION EQUIPMENT Co Ltd
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Publication date
Application filed by CHONGQING YIMAN ENVIRONMENTAL PROTECTION EQUIPMENT Co Ltd filed Critical CHONGQING YIMAN ENVIRONMENTAL PROTECTION EQUIPMENT Co Ltd
Priority to CN201410701471.5A priority Critical patent/CN105695720A/en
Publication of CN105695720A publication Critical patent/CN105695720A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a heat treatment process for a supporting wheel. The heat treatment process for the supporting wheel is characterized in that the supporting wheel is made of WK40CrNi2Mo steel, and the heat treatment process for the supporting wheel comprises the following steps of quenching, tempering and surface induction heat treatment. According to the heat treatment process for the supporting wheel provided by the invention, the comprehensive performance of the supporting wheel can be improved; after quenching and tempering are conducted, the hardness of a wheel hub and a wheel flange is 302-341 HBW, the surface hardness of the hardened area of the supporting wheel is 52-62 HRC, and quenching and tempering enable a base body to reach the required hardness and also make a structure preparation for surface quenching treatment of the outer surface of the wheel flange; after surface heat treatment is conducted, the surface hardness of the wheel flange is uniform and kept to be 58-61 HRC, the uniformity is good, and the surface hardness requirement is met.

Description

A kind of thrust wheel Technology for Heating Processing
Technical field
The invention belongs to Technology for Heating Processing field, specifically a kind of thrust wheel Technology for Heating Processing。
Background technology
Thrust wheel is the one in four-wheel one band of tracked construction equipment chassis, and its Main Function is the weight that support excavator with bull-dozer, allows crawler belt advance along wheel。The general 50Mn of thrust wheel wheel body material, 40Mn2, etc. material, main technique casting or forging, machining, then carry out heat treatment, wheel surface quenching after hardness to reach HRC45-52, to increase the wearability of wheel surface。The requirement on machining accuracy of supporting wheel shaft is higher, is usually and needs Digit Control Machine Tool to be processed can be only achieved requirement。Material is more with 40Mn2, also quenching heat treatment is carried out after processing, hardness reaches about HRC42, but existing thrust wheel wheel body easily weares and teares, occurring that the reason of this situation is that hardness during the defective material heat treatment in other words of steel adopted is relatively low, wearability deficiency causes, and accelerates when the reduction of wheel body diameter becomes wheel linear velocity, the friction that axle sleeve bears is more many, causes deformation or drop。Mine excavator is that domestic and international modernization large surface mine is efficient, one of critical equipment necessary to Intelligentized mining。Its thrust wheel is as the critical piece of excavator load-bearing, and Service Environment is severe, because contacting with crawler belt, the wearability of wheel rim, anti-fatigue performance and impact resistance is all had higher requirements。And solve this problem about thrust wheel only with for structure and size increase mode at present。
Summary of the invention
It is an object of the invention to for Shortcomings part in above-mentioned technology, the present invention provides a kind of thrust wheel Technology for Heating Processing。
The technical scheme realizing the object of the invention is as follows:
A kind of thrust wheel Technology for Heating Processing, it is characterised in that material adopts WK40CrNi2Mo steel, and its Technology for Heating Processing comprises the steps of quenched → tempering → surface induction heat treatment;Described quenching, its hardening heat is 850-870 DEG C, temperature retention time calculates with sectional dimension 10-15mm/h, thrust wheel shrend time first time presses diameter every millimeter cooling 1-1.2s and calculates, after water outlet, the time of staying, between 20-35s, cools down again in water in atmosphere, and the second time shrend time is primary 2-3 times, then cool down 3-5min in atmosphere, then proceed in oil and continue cool to room temperature;Described tempering, its temperature is 480-500 DEG C, and insulation 2-2.5h, 10-15 DEG C/h speed stove is cold, described surface induction heat treatment, its technological parameter: frequency 50Hz, power 350-380kW, quench gap 16-20mm, induction apparatus translational speed 200-220mm/min, cooling medium is water, then through 200-230 DEG C of temperature tempering, tempering time 10-15h after surface hardening。
A kind of thrust wheel Technology for Heating Processing of the present invention, modified rear hardness wheel hub and rim section hardness 302-341HBW, its hardened area case hardness 52-62HRC, modifier treatment makes matrix reach the hardness of requirement, also processes for the surface hardening of rim outer surface and does tissue preparation, after Surface heat-treatent, wheel rim surface hardness is uniform, hardness is maintained at 58-61HRC, and uniformity is better, meets case hardness requirement。
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described:
A kind of thrust wheel Technology for Heating Processing, material adopts WK40CrNi2Mo steel, and its Technology for Heating Processing comprises the steps of quenched → tempering → surface induction heat treatment;Described quenching, its hardening heat is 850-870 DEG C, temperature retention time calculates with sectional dimension 10-15mm/h, thrust wheel shrend time first time presses diameter every millimeter cooling 1-1.2s and calculates, after water outlet, the time of staying, between 20-35s, cools down again in water in atmosphere, and the second time shrend time is primary 2-3 times, then cool down 3-5min in atmosphere, then proceed in oil and continue cool to room temperature;Described tempering, its temperature is 480-500 DEG C, and insulation 2-2.5h, 10-15 DEG C/h speed stove is cold, described surface induction heat treatment, its technological parameter: frequency 50Hz, power 350-380kW, quench gap 16-20mm, induction apparatus translational speed 200-220mm/min, cooling medium is water, then through 200-230 DEG C of temperature tempering, tempering time 10-15h after surface hardening。
The preferred embodiment of the present invention described in detail above。Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to the design of the present invention without creative work。All technical staff in the art, all should in the protection domain being defined in the patent claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment。

Claims (1)

1. a thrust wheel Technology for Heating Processing, it is characterised in that material adopts WK40CrNi2Mo steel, and its Technology for Heating Processing comprises the steps of quenched → tempering → surface induction heat treatment;Described quenching, its hardening heat is 850-870 DEG C, temperature retention time calculates with sectional dimension 10-15mm/h, thrust wheel shrend time first time presses diameter every millimeter cooling 1-1.2s and calculates, after water outlet, the time of staying, between 20-35s, cools down again in water in atmosphere, and the second time shrend time is primary 2-3 times, then cool down 3-5min in atmosphere, then proceed in oil and continue cool to room temperature;Described tempering, its temperature is 480-500 DEG C, and insulation 2-2.5h, 10-15 DEG C/h speed stove is cold, described surface induction heat treatment, its technological parameter: frequency 50Hz, power 350-380kW, quench gap 16-20mm, induction apparatus translational speed 200-220mm/min, cooling medium is water, then through 200-230 DEG C of temperature tempering, tempering time 10-15h after surface hardening。
CN201410701471.5A 2014-11-28 2014-11-28 Heat treatment process for supporting wheel Pending CN105695720A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410701471.5A CN105695720A (en) 2014-11-28 2014-11-28 Heat treatment process for supporting wheel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410701471.5A CN105695720A (en) 2014-11-28 2014-11-28 Heat treatment process for supporting wheel

Publications (1)

Publication Number Publication Date
CN105695720A true CN105695720A (en) 2016-06-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410701471.5A Pending CN105695720A (en) 2014-11-28 2014-11-28 Heat treatment process for supporting wheel

Country Status (1)

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CN (1) CN105695720A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107586938A (en) * 2017-09-08 2018-01-16 马钢(集团)控股有限公司 A kind of heat treatment method of medium carbon low alloy steel railway wheel
CN109055704A (en) * 2018-08-24 2018-12-21 海宁佳盛汽车零部件有限公司 A kind of surface heat treatment process of hub unit
CN112011680A (en) * 2020-07-28 2020-12-01 马鞍山钢铁股份有限公司 Intermittent quenching method for railway wheels

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107586938A (en) * 2017-09-08 2018-01-16 马钢(集团)控股有限公司 A kind of heat treatment method of medium carbon low alloy steel railway wheel
CN109055704A (en) * 2018-08-24 2018-12-21 海宁佳盛汽车零部件有限公司 A kind of surface heat treatment process of hub unit
CN112011680A (en) * 2020-07-28 2020-12-01 马鞍山钢铁股份有限公司 Intermittent quenching method for railway wheels

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Application publication date: 20160622