CN105403586A - Mold for quantitatively analyzing heat cracking and cold cracking trends of non-ferrous alloys and analysis method - Google Patents
Mold for quantitatively analyzing heat cracking and cold cracking trends of non-ferrous alloys and analysis method Download PDFInfo
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- CN105403586A CN105403586A CN201510785429.0A CN201510785429A CN105403586A CN 105403586 A CN105403586 A CN 105403586A CN 201510785429 A CN201510785429 A CN 201510785429A CN 105403586 A CN105403586 A CN 105403586A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
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Abstract
The invention provides a mold for quantitatively analyzing heat cracking and cold cracking trends of non-ferrous alloys. The mold comprises a lower box and an upper box, wherein an annular test sample cavity is arranged at each of the two ends of the lower box; a pouring gate is arranged between the two annular test sample cavities; the upper box is arranged above the lower box; the upper box forms a tapered pouring gate through molding; and the tapered pouring gate is connected with the pouring gate of the lower box. An analysis method comprises a molding step, a smelting and pouring step, a box opening and checking step, and a temperature measuring checking step. The mold provided by the invention has the advantages that the analysis of the heat cracking and cold cracking trends of the non-ferrous alloys with the specific components can be finished rapidly and quantitatively in one furnace, and the heat cracking and cold cracking trends of the non-ferrous alloys are obviously distinguished; and the mold is simple and convenient to operate and is particularly suitable for rapidly evaluating the molding manufacturability of various novel casting non-ferrous alloys.
Description
Technical field
What the present invention relates to is a kind of analytical approach of cast nonferrous alloy tearing tendency, the specifically method of the hot tearing of a kind of quantitative test non-ferrous alloy and cold cracking inclination.
Background technology
Cracking is the major defect of foundry goods.The foundry goods of an ad hoc structure, its tearing tendency determines the feasibility of casting technique and the qualification rate of foundry goods.The cracking of non-ferrous alloy casting is divided into hot tearing and cold cracking, and hot tearing produces in casting solidification process, and cold cracking produces in foundry goods cooling procedure.Hot tearing, the cold cracking inclination of foundry goods mainly affect by factors such as alloying component, casting structure, casting techniques, but for specific casting structure and technique, the composition of alloy and metallurgical quality are then the determinatives determining foundry goods two kinds of tearing tendencies.The method of the hot cracking tendency of existing analysis alloy comprises hot cracking tendency analyzer method, " hot tearing ring " method, " hot tearing rod " method.The hot cracking tendency of hot cracking tendency analyzer method alloy measures comparatively accurately, but operation and Appraisal process complexity.For the cold cracking inclination of alloy, there is no effective method of testing at present, the Solid State Contraction rate of general alloy estimates the cold cracking inclination of alloy.Operation and the judge of " hot tearing ring " and " hot tearing rod " method are comparatively simple, but these two kinds of methods be subject to sample solidify completely after cooling meat impact, the actual also non-fully obtained is heated and is split function influence, be the result of alloy hot tearing, the combined action of cold cracking two kinds tendency, the kind differentiation that alloy ftractures is also unintelligible.
For improving efficiency and the validity of nonferrous alloy casting technological design, particularly improving the casting Technology Design level of novel casting non-ferrous alloy, easier and method accurately should be adopted, the hot tearing of compartment analysis non-ferrous alloy and cold cracking inclination.
Summary of the invention
For defect of the prior art, the object of this invention is to provide one for the mould of the hot tearing of quantitative test non-ferrous alloy and cold cracking inclination and analytical approach.
The present invention is achieved by the following technical solutions:
First aspect, the invention provides a kind of mould for the hot tearing of quantitative test non-ferrous alloy and cold cracking inclination, it comprises a nowel and a top box, the two ends of described nowel are respectively provided with a ring specimen chamber, running channel is provided with between two described ring specimen chambeies, described top box is arranged at lower box top, and be provided with cast gate in the middle of top box, described cast gate is connected with running channel.
Preferably, the external diameter in described ring specimen chamber is 108mm.
Preferably, the section shape of described cast gate is inverted isosceles trapezoid.
Preferably, the central authorities in described ring specimen chamber are provided with core.
Preferably, described core is steel core.
Preferably, the outside of described core is provided with chill.
Second aspect, present invention also offers a kind of analytical approach based on the aforesaid mould for the hot tearing of quantitative test non-ferrous alloy and cold cracking inclination, it comprises the steps:
Step of overall modelling, smelting and pouring step, step of unpacking and cooling checking procedure.
Preferably, described step of overall modelling comprises following operation:
Top box and nowel are carried out moulding, and the diameter of steel core for interval, from 38mm to 98mm incremental variations, obtains the ring specimen of different in width with 3mm ~ 5mm.
Preferably, step of unpacking described in comprises following operation:
Alloy molten solution is injected in sprue gate, alloy molten solution is flowed in ring specimen chamber, unpacks after the ring specimen casting complete 2 ~ 5min in each casting mold, record the minimum widith of indehiscent ring specimen, quantitatively by the hot cracking tendency value of analysis alloy; If all samples all do not ftracture, then the hot cracking tendency value of analyzed alloy is quantitatively lower than 5mm.
Preferably, described cooling checking procedure comprises following operation:
Under steel core and the unseparated prerequisite of ring specimen, wait being cooled to after below 30 DEG C, record the minimum widith of indehiscent ring specimen, quantitatively by the cold cracking inclination value of analysis alloy; If all indehiscent ring specimens and steel core are not separated to be cooled to after below 30 DEG C and still do not ftracture when unpacking, then the cold cracking inclination value of analyzed alloy is quantitatively lower than its hot cracking tendency value.
Compared with prior art, the present invention has following beneficial effect:
Quick, quantitatively in a heat can complete the hot tearing of special component non-ferrous alloy, the analysis of cold cracking inclination, and distinguish obviously to the hot tearing of non-ferrous alloy, cold cracking inclination, easy and simple to handle, be particularly useful for the forming technology of the various novel casting non-ferrous alloy of Fast Evaluation.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Fig. 1 is the structural representation of mould in the present invention;
Fig. 2 is the vertical view of top box in the present invention;
Fig. 3 is the vertical view of nowel in the present invention;
In figure: 1, mo(u)ld top half circle; 2, mo(u)ld bottom half circle; 3, ring specimen chamber; 4, running channel; 5, cast gate; 6, molding sand; 7, core; 8, chill.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art and understand the present invention further, but not limit the present invention in any form.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, some distortion and improvement can also be made.These all belong to protection scope of the present invention.
The structure of a kind of mould for the hot tearing of quantitative test non-ferrous alloy and cold cracking inclination provided by the invention as shown in Figures 1 to 3, for the mould of the hot tearing of quantitative test non-ferrous alloy and cold cracking inclination, it comprises a nowel being framework with mo(u)ld bottom half circle 2 with mo(u)ld top half circle 1 top box that is framework and, the two ends of nowel are respectively provided with a ring specimen chamber 3, the diameter in ring specimen chamber is 108mm, running channel 4 is provided with between two ring specimen chambeies 3, top box 1 is arranged at nowel 2 top, cast gate 5 is provided with in the middle of top box 1, cast gate 5 is connected with running channel 4, molding sand 6 is all filled with in top box and nowel.
During use, in two ring specimen chambeies 3, install core 7 additional respectively, outside core 7, also respectively install one block of chill 8 additional.
In figure: 1, mo(u)ld top half circle; 2, mo(u)ld bottom half circle; 3, ring specimen chamber; 4, running channel; 5, cast gate; 6, molding sand; 7, core; 8, chill.
embodiment 1
The hot tearing of quantitative test aldary and cold cracking inclination
Step of overall modelling: according to accompanying drawing 1, the moulding of upper and lower case horizontal parting, adopts steel core as core, steel core is positioned at the disk die cavity of diameter 108mm, the diameter of steel core take 3mm as interval, from 38mm to 98mm incremental variations, to obtain the ring specimen of different in width.
Smelting and pouring step: by analyzed smelting copper alloy, be incubated to assigned temperature, pours in several casting molds of step of overall modelling manufacture.
To unpack step: unpack after the ring specimen casting complete 2min in each casting mold, record the minimum widith of indehiscent ring specimen, quantitatively by the hot cracking tendency value of analysis alloy; If all samples all do not ftracture, then the hot cracking tendency value of analyzed aldary is quantitatively lower than 5mm.
Cooling checking procedure: choose all indehiscent ring specimens when unpacking, under steel core and the unseparated prerequisite of ring specimen, wait is cooled to less than 30 DEG C, records the minimum widith of indehiscent ring specimen, quantitatively by the cold cracking inclination value of analysis alloy; If all indehiscent ring specimens and steel core are not separated to be cooled to after below 30 DEG C and still do not ftracture when unpacking, then the cold cracking inclination value of analyzed aldary is quantitatively lower than its hot cracking tendency value.
embodiment 2
The hot tearing of quantitative test magnesium alloy and cold cracking inclination
Step of overall modelling: according to accompanying drawing 1, the moulding of upper and lower case horizontal parting, adopts steel core as core, steel core is positioned at the disk die cavity of diameter 108mm, the diameter of steel core take 4mm as interval, from 38mm to 98mm incremental variations, to obtain the ring specimen of different in width.
Smelting and pouring step: by analyzed magnesium alloy smelting, be incubated to assigned temperature, pours in several casting molds of step of overall modelling manufacture.
To unpack step: unpack after the ring specimen casting complete 3min in each casting mold, record the minimum widith of indehiscent ring specimen, quantitatively by the hot cracking tendency value of analysis alloy; If all samples all do not ftracture, then the hot cracking tendency value of analyzed magnesium alloy is quantitatively lower than 5mm.
Cooling checking procedure: choose all indehiscent ring specimens when unpacking, under steel core and the unseparated prerequisite of ring specimen, wait is cooled to less than 30 DEG C, records the minimum widith of indehiscent ring specimen, quantitatively by the cold cracking inclination value of analysis alloy; If all indehiscent ring specimens and steel core are not separated to be cooled to after below 30 DEG C and still do not ftracture when unpacking, then the cold cracking inclination value of analyzed magnesium alloy is quantitatively lower than its hot cracking tendency value.
embodiment 3
The hot tearing of quantitative test aluminium alloy and cold cracking inclination
Step of overall modelling: according to accompanying drawing 1, the moulding of upper and lower case horizontal parting, adopts steel core as core, steel core is positioned at the disk die cavity of diameter 108mm, the diameter of steel core take 5mm as interval, from 38mm to 98mm incremental variations, to obtain the ring specimen of different in width.
Smelting and pouring step: by analyzed aluminium alloy smelting, be incubated to assigned temperature, pours in several casting molds of step of overall modelling manufacture.
To unpack step: unpack after the ring specimen casting complete 5min in each casting mold, record the minimum widith of indehiscent ring specimen, quantitatively by the hot cracking tendency value of analysis alloy; If all samples all do not ftracture, then the hot cracking tendency value of analyzed aluminium alloy is quantitatively lower than 5mm.
Cooling checking procedure: choose all indehiscent ring specimens when unpacking, under steel core and the unseparated prerequisite of ring specimen, wait is cooled to less than 30 DEG C, records the minimum widith of indehiscent ring specimen, quantitatively by the cold cracking inclination value of analysis alloy; If all indehiscent ring specimens and steel core are not separated to be cooled to after below 30 DEG C and still do not ftracture when unpacking, then the cold cracking inclination value of analyzed aluminium alloy is quantitatively lower than its hot cracking tendency value.
Above specific embodiments of the invention are described.It is to be appreciated that the present invention is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (10)
1. the mould for the hot tearing of quantitative test non-ferrous alloy and cold cracking inclination, it is characterized in that, comprise a nowel and a top box, the two ends of described nowel are respectively provided with a ring specimen chamber, running channel is provided with between two described ring specimen chambeies, described top box is arranged at lower box top, and be provided with cast gate in the middle of top box, described cast gate is connected with running channel.
2., as claimed in claim 1 for the mould of the hot tearing of quantitative test non-ferrous alloy and cold cracking inclination, it is characterized in that, the external diameter in described ring specimen chamber is 108mm.
3., as claimed in claim 1 for the mould of the hot tearing of quantitative test non-ferrous alloy and cold cracking inclination, it is characterized in that, the section shape of described cast gate is inverted isosceles trapezoid.
4., as claimed in claim 1 for the mould of the hot tearing of quantitative test non-ferrous alloy and cold cracking inclination, it is characterized in that, the central authorities in described ring specimen chamber are provided with core.
5., as claimed in claim 4 for the mould of the hot tearing of quantitative test non-ferrous alloy and cold cracking inclination, it is characterized in that, described core is steel core.
6. the mould for the hot tearing of quantitative test non-ferrous alloy and cold cracking inclination as described in claim 4 or 5, it is characterized in that, the outside of described core is provided with chill.
7., based on an analytical approach for the mould for the hot tearing of quantitative test non-ferrous alloy and cold cracking inclination in Claims 1 to 5 described in any one, it is characterized in that, comprise the steps:
Step of overall modelling, smelting and pouring step, step of unpacking and cooling checking procedure.
8. analytical approach as claimed in claim 7, it is characterized in that, described step of overall modelling comprises following operation:
Top box and nowel are carried out moulding, and the diameter of steel core for interval, from 38mm to 98mm incremental variations, obtains the ring specimen of different in width with 3mm ~ 5mm.
9. analytical approach as claimed in claim 7, is characterized in that, described in step of unpacking comprise following operation:
Alloy molten solution is injected in sprue gate, alloy molten solution is flowed in ring specimen chamber, unpacks after the ring specimen casting complete 2 ~ 5min in each casting mold, record the minimum widith of indehiscent ring specimen, quantitatively by the hot cracking tendency value of analysis alloy; If all samples all do not ftracture, then the hot cracking tendency value of analyzed alloy is quantitatively lower than 5mm.
10. analytical approach as claimed in claim 7, it is characterized in that, described cooling checking procedure comprises following operation:
Under steel core and the unseparated prerequisite of ring specimen, wait being cooled to after below 30 DEG C, record the minimum widith of indehiscent ring specimen, quantitatively by the cold cracking inclination value of analysis alloy; If all indehiscent ring specimens and steel core are not separated to be cooled to after below 30 DEG C and still do not ftracture when unpacking, then the cold cracking inclination value of analyzed alloy is quantitatively lower than its hot cracking tendency value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510785429.0A CN105403586A (en) | 2015-11-16 | 2015-11-16 | Mold for quantitatively analyzing heat cracking and cold cracking trends of non-ferrous alloys and analysis method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510785429.0A CN105403586A (en) | 2015-11-16 | 2015-11-16 | Mold for quantitatively analyzing heat cracking and cold cracking trends of non-ferrous alloys and analysis method |
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| Publication Number | Publication Date |
|---|---|
| CN105403586A true CN105403586A (en) | 2016-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510785429.0A Pending CN105403586A (en) | 2015-11-16 | 2015-11-16 | Mold for quantitatively analyzing heat cracking and cold cracking trends of non-ferrous alloys and analysis method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806876A (en) * | 2016-05-18 | 2016-07-27 | 沈阳工业大学 | Experimental device for testing hot cracking tendency of alloy |
| CN115121768A (en) * | 2022-04-26 | 2022-09-30 | 湘潭大学 | Shell structure, preparation method thereof and hot cracking tendency judgment method |
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| US20070090159A1 (en) * | 2005-10-19 | 2007-04-26 | Showa Denko K.K. | Clamp apparatus, joining method, and method of manufacturing hollow member |
| CN101786213A (en) * | 2010-03-26 | 2010-07-28 | 哈尔滨工业大学 | Method for controlling generation of cold crack in welding process based on electromagnetic induction heating |
| CN202388139U (en) * | 2011-12-23 | 2012-08-22 | 中联重科股份有限公司 | Test device for cold cracks in restraint welding |
| CN104999032A (en) * | 2015-06-15 | 2015-10-28 | 上海交通大学 | Casting and method for evaluating hot crack tendency of high temperature alloy investment casting process |
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2015
- 2015-11-16 CN CN201510785429.0A patent/CN105403586A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070090159A1 (en) * | 2005-10-19 | 2007-04-26 | Showa Denko K.K. | Clamp apparatus, joining method, and method of manufacturing hollow member |
| CN101786213A (en) * | 2010-03-26 | 2010-07-28 | 哈尔滨工业大学 | Method for controlling generation of cold crack in welding process based on electromagnetic induction heating |
| CN202388139U (en) * | 2011-12-23 | 2012-08-22 | 中联重科股份有限公司 | Test device for cold cracks in restraint welding |
| CN104999032A (en) * | 2015-06-15 | 2015-10-28 | 上海交通大学 | Casting and method for evaluating hot crack tendency of high temperature alloy investment casting process |
Non-Patent Citations (2)
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| D.G. ESKIN ET AL.: "Mechanical properties in the semi-solid state and hot tearing of aluminium alloys", 《PROGRESS IN MATERIALS SCIENCE》 * |
| 王怀国: "镁合金热裂行为研究进展", 《材料导报A：综述篇》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806876A (en) * | 2016-05-18 | 2016-07-27 | 沈阳工业大学 | Experimental device for testing hot cracking tendency of alloy |
| CN105806876B (en) * | 2016-05-18 | 2018-05-01 | 沈阳工业大学 | The experimental provision of beta alloy hot cracking tendency |
| CN115121768A (en) * | 2022-04-26 | 2022-09-30 | 湘潭大学 | Shell structure, preparation method thereof and hot cracking tendency judgment method |
| CN115121768B (en) * | 2022-04-26 | 2024-04-05 | 湘潭大学 | Shell structure, preparation method thereof and hot cracking tendency judging method |
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