CN105382432A - Defect mending technology for heavy-duty metal castings - Google Patents
Defect mending technology for heavy-duty metal castings Download PDFInfo
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- CN105382432A CN105382432A CN201410392384.6A CN201410392384A CN105382432A CN 105382432 A CN105382432 A CN 105382432A CN 201410392384 A CN201410392384 A CN 201410392384A CN 105382432 A CN105382432 A CN 105382432A
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Abstract
Provided is defect mending technology for heavy-duty metal castings. The defect mending technology comprises following steps of: a, preparing metal castings to be repaired, clearing defect parts of metal castings and eliminating impurities such that smooth transition of corners of defects are achieved; b, locally heating metal castings with cleared defects parts in the step a and integrally heating if defects are large at the temperature ranging from 200 to 300 DEG C; c, selecting welding material in the same or approximate material of castings and performing welding repair at defect parts and continuously heating during a surfacing process such that repair material is in the state at temperature from 200 to 300 DEG C and keeping till welding repair is finished for non-stop 24 hours; and d, timely performing stress relieving if surfacing operation is carried out and finishing repair technology of defects parts of metal castings.
Description
Technical field
The present invention relates to metal casting treatment process, particularly relate to the technique that a kind of heavy duty metal casting defect is repaired.
Background technology
The purposes of foundry goods widely, five metals and whole mechano-electronic industry etc. are applied to, and its purposes is becoming the trend constantly expanded, specifically use the big machineries such as building, engineering machinery, the heavy heavy parts piece weight such as lathe, boats and ships constantly increases, and easily makes surface and inside occur defect, reduce the intensity of metal casting in metal casting process of the prior art, service life is short, reduces product quality and even scraps.
Therefore, the technology being badly in need of a kind of improvement solves this problem existing in prior art.
Summary of the invention
The object of this invention is to provide the technique that a kind of heavy duty metal casting defect is repaired.
The technical solution used in the present invention is: the technique that a kind of heavy duty metal casting defect is repaired, and comprises the steps: a, prepares metal casting to be repaired, clear up, the removal of impurity to the rejected region of metal casting, make the corner gentle transition of defect; B, to the metal casting local heat of clearing up fault location in step a, if defect is excessive need overall heating, temperature 200-300 DEG C; C, in step b fault location select wlding that is identical with castings material or that be close carry out soldering, in weld deposit process continue heating, make repair materials be in 200-300 DEG C of state, remain to soldering and terminate, 24 hours do not stop; If d built-up welding is full, then stress relief annealing in time, completes the repair technology of metal casting fault location.
Described repair materials is made up of the welding material identical with metal casting composition.
The temperature heated in described step b is 200-300 DEG C.
The temperature heated in described steps d is 500-550 DEG C.
Advantage of the present invention is: repaired metal casting surface and inner defect, improve the intensity of metal casting, make metal casting not yielding, long service life, improved the service property (quality) of metal casting.
Detailed description of the invention
Following embodiment only for illustration of the present invention, but can not limit protection scope of the present invention.
Embodiment 1: the technique that a kind of heavy duty metal casting defect of the present invention is repaired, comprises the steps: a, prepares metal casting to be repaired, clear up, the removal of impurity to the rejected region of metal casting, make the corner gentle transition of defect; B, to the metal casting local heat of clearing up in step a after fault location, if defect is excessive need overall heating, the temperature of heating is 250 DEG C, and at fault location Bead weld repair material; C, select wlding that is identical with castings material or that be close to carry out soldering to the fault location in step b, and make temperature remain on 250 DEG C, remain to soldering and terminate, 24 hours do not stop; D, soldering completes enters furnace treatment reason stress relief annealing 500-550 DEG C in time, completes the repair technology of metal casting fault location.
Embodiment 2: step: a, prepare metal casting to be repaired, the rejected region of metal casting is cleared up, the removal of impurity, make the corner gentle transition of defect; B, to the metal casting local heat of clearing up in step a after fault location, if defect is excessive need overall heating, the temperature of heating is 200 DEG C, and at fault location Bead weld repair material; C, select wlding that is identical with castings material or that be close to carry out soldering to the fault location in step b, and make temperature remain on 200 DEG C, remain to soldering and terminate, 24 hours do not stop; D, soldering completes enters furnace treatment reason stress relief annealing 500-550 DEG C in time, completes the repair technology of metal casting fault location.
Embodiment 3: step: a, prepare metal casting to be repaired, the rejected region of metal casting is cleared up, the removal of impurity, make the corner gentle transition of defect; B, to the metal casting local heat of clearing up in step a after fault location, if defect is excessive need overall heating, the temperature of heating is 300 DEG C, and at fault location Bead weld repair material; C, select wlding that is identical with castings material or that be close to carry out soldering to the fault location in step b, and make temperature remain on 300 DEG C, remain to soldering and terminate, 24 hours do not stop; D, soldering completes enters furnace treatment reason stress relief annealing 500-550 DEG C in time, completes the repair technology of metal casting fault location.
Described repair materials is made up of the dusty material that described metal casting composition is identical.
Claims (4)
1. a technique for heavy duty metal casting defect repairing, is characterized in that, comprise the steps: a, prepares metal casting to be repaired, clear up, the removal of impurity to the rejected region of metal casting, make the corner gentle transition of defect; B, to the metal casting local heat of clearing up in step a after fault location, if defect is excessive need overall heating, the temperature of heating is 250 DEG C, and at fault location Bead weld repair material; C, select wlding that is identical with castings material or that be close to carry out soldering to the fault location in step b, and make temperature remain on 250 DEG C, remain to soldering and terminate, 24 hours do not stop; D, soldering completes enters furnace treatment reason stress relief annealing 500-550 DEG C in time, completes the repair technology of metal casting fault location.
2. according to the technique that heavy duty metal casting defect a kind of in claim 1 is repaired, it is characterized in that: to the metal casting local heat of clearing up in step a after fault location, if defect is excessive need overall heating, the temperature of heating is 200 DEG C, and at fault location Bead weld repair material; Select wlding that is identical with castings material or that be close to carry out soldering to the fault location in step b, and make temperature remain on 200 DEG C, remain to soldering and terminate, 24 hours do not stop; Soldering completes enters furnace treatment reason stress relief annealing 500-550 DEG C in time, completes the repair technology of metal casting fault location.
3. according to the technique that heavy duty metal casting defect a kind of in claim 1 is repaired, it is characterized in that: to the metal casting local heat of clearing up in step a after fault location, if defect is excessive need overall heating, the temperature of heating is 300 DEG C, and at fault location Bead weld repair material; Select wlding that is identical with castings material or that be close to carry out soldering to the fault location in step b, and make temperature remain on 300 DEG C, remain to soldering and terminate, 24 hours do not stop; Soldering completes enters furnace treatment reason stress relief annealing 500-550 DEG C in time, completes the repair technology of metal casting fault location.
4., according to the repair materials described in claim 1,2,3, be made up of the dusty material that described metal casting composition is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410392384.6A CN105382432A (en) | 2014-08-12 | 2014-08-12 | Defect mending technology for heavy-duty metal castings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410392384.6A CN105382432A (en) | 2014-08-12 | 2014-08-12 | Defect mending technology for heavy-duty metal castings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105382432A true CN105382432A (en) | 2016-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410392384.6A Pending CN105382432A (en) | 2014-08-12 | 2014-08-12 | Defect mending technology for heavy-duty metal castings |
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| CN (1) | CN105382432A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108406150A (en) * | 2018-02-27 | 2018-08-17 | 首钢京唐钢铁联合有限责任公司 | Sample plate combination for online surfacing of star-wheel toothed plate and online surfacing method |
| CN108747196A (en) * | 2018-05-30 | 2018-11-06 | 广东中天创展球铁有限公司 | A kind of weldering repair renovation method of ductile iron workpiece |
| CN111187883A (en) * | 2020-02-28 | 2020-05-22 | 广西玉柴机器股份有限公司 | Method for solving problem of high local hardness of cast iron casting after weld repair |
| CN113878301A (en) * | 2021-10-27 | 2022-01-04 | 镇江同舟螺旋桨有限公司 | Surface defect repairing process for propeller casting |
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| CN101104234A (en) * | 2007-08-10 | 2008-01-16 | 四川东风电机厂有限公司 | Water wheel generating set cast steel part defect repair welding crackle processing method |
| GB2443494A (en) * | 2006-07-14 | 2008-05-07 | Corus Uk Ltd | A method of weld repairing or cladding a steel bloom , rail or other part of a railway |
| CN103769728A (en) * | 2014-03-04 | 2014-05-07 | 江苏万恒铸业有限公司 | Process for repair-welding steel casting through flux-cored wire CO2 gas shielded welding |
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2014
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2443494A (en) * | 2006-07-14 | 2008-05-07 | Corus Uk Ltd | A method of weld repairing or cladding a steel bloom , rail or other part of a railway |
| CN101104234A (en) * | 2007-08-10 | 2008-01-16 | 四川东风电机厂有限公司 | Water wheel generating set cast steel part defect repair welding crackle processing method |
| CN103769728A (en) * | 2014-03-04 | 2014-05-07 | 江苏万恒铸业有限公司 | Process for repair-welding steel casting through flux-cored wire CO2 gas shielded welding |
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| 帅玉峰等: "关于铸钢缺陷的补焊", 《焊接技术》 * |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108406150A (en) * | 2018-02-27 | 2018-08-17 | 首钢京唐钢铁联合有限责任公司 | Sample plate combination for online surfacing of star-wheel toothed plate and online surfacing method |
| CN108747196A (en) * | 2018-05-30 | 2018-11-06 | 广东中天创展球铁有限公司 | A kind of weldering repair renovation method of ductile iron workpiece |
| CN111187883A (en) * | 2020-02-28 | 2020-05-22 | 广西玉柴机器股份有限公司 | Method for solving problem of high local hardness of cast iron casting after weld repair |
| CN113878301A (en) * | 2021-10-27 | 2022-01-04 | 镇江同舟螺旋桨有限公司 | Surface defect repairing process for propeller casting |
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Application publication date: 20160309 |