CN1116572A - Method for enhancing soldering strength - Google Patents
Method for enhancing soldering strength Download PDFInfo
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- CN1116572A CN1116572A CN 94109465 CN94109465A CN1116572A CN 1116572 A CN1116572 A CN 1116572A CN 94109465 CN94109465 CN 94109465 CN 94109465 A CN94109465 A CN 94109465A CN 1116572 A CN1116572 A CN 1116572A
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- hip treatment
- weldment
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- acetylene
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Abstract
The method for increasing strength of braze welding hard alloy and steel together by strengthening metallic creep effect features technologically that the workpiece manually welded by oxyacetylene is treated by hot isostatic pressure at 250-350 deg.C and 35-45 MPa. Experiment shows that it is especially suitable for copper welding, which can increase shear strength of welded layer by 50% or 47% after quenching. The method may be used for hard alloy cutter and petroleum drill bit.
Description
The present invention is a kind of method that the manual weldment of oxy-acetylene is handled.The method of this after welding treatment can effectively improve the soldering strength of carbide alloy and steel, also is a kind of new technology of reinforced metal creep effect.
It is abominable that the present invention is primarily aimed at some service condition, the brazing member of complex contour, with existing oxy-acetylene manual welding and the (low-temperature heat of after welding treatment technology, stress in the lax weldment) its most layer intensity can not satisfy the requirement of military service, because the weldment profile relates to multidirectional soldering, realize having big difficulty with the vacuum diffusion method, in addition again, the present invention also needs the postwelding quenching to improve the weldment of strength of parent at some, and general layer soldering strength after quenching all can sharply descend at present.Above-mentioned problem is a difficult problem that exists in the soldering tech.
For addressing these problems, the invention provides a kind of method of strengthening layer position creep effect, processing has also added certain static pressure except that temperature to weldment, produce the principle of steady state creep at low temperatures based on copper alloy, the present invention attempts to strengthen the creep process at layer position with pressurization, tension in alleviation or the elimination weldment also makes faying face in conjunction with tightr, has adopted the method for postwelding low temperature hip treatment.At present heat and other static pressuring processes generally is used under the HTHP intensive treatment to sintered hard alloy at home and abroad.
Hip treatment is to finish in the special hot isostatic press with equal pressure intensity, and (the present invention tests in 15Q16 ＂ * 33 ＂ * GF150 hot isostatic press) is called for short RDJY and handled.
Hip treatment technology:
Temperature 250-350 ℃, pressure 35-45MPa.Optimum temperature 250-300 ℃, optimum pressure 35-40MPa.
Be incubated one hour and lower the temperature with stove.
Prove through repetition test, weldment is carried out above after welding treatment can obtain desirable effect, the intensity of brazing layer is greatly improved.
For different weldments, the various combination of mother metal and scolder through the ideal results of its test of hip treatment is:
(1) silver-spelter solder, mother metal are low-carbon alloy steel:
Oxy-acetylene manual welding (melting solder is welded together with mother metal and carbide filler), postwelding is through hip treatment.
Its result of the test is to compare with the weldment of similar not hip treatment to improve brazing layer shear strength about 28% (see Table 1, be numbered 1,2 test specimen contrast).
(2) silver-spelter solder, mother metal are low-carbon alloy steel carburizing (or high-carbon alloy steel):
Oxy-acetylene manual welding (melting solder is welded together with mother metal and carbide filler), postwelding is through hip treatment.
Its result of the test is to compare with the weldment of similar not hip treatment to improve brazing layer shear strength about 50% (see Table 1, be numbered 3,4 test specimen contrast).
(3) copper-62 scolder, mother metal are low-carbon alloy steel carburizing (or high-carbon alloy steel):
Oxy-acetylene manual welding (melting solder is welded together with mother metal and carbide filler), postwelding is through hip treatment.
Its result of the test is to compare with the weldment of similar not hip treatment to improve brazing layer shear strength about 20% (see Table 1, be numbered 5,6 test specimen contrast).
(4) copper-62 scolder, mother metal are low-carbon alloy steel carburizing (or high-carbon alloy steel):
Oxy-acetylene manual welding (melting solder is welded together with mother metal and carbide filler), postwelding carry out weldment and quench, through hip treatment.
Its result of the test is to compare with the weldment of similar not hip treatment can improve brazing layer shear strength about 47% and (see Table 1, be numbered 7,8 test specimen contrast), thereby improved the hardenability of copper-62 layer, make the shear strength after copper-62 layer quenches reach 25 kilograms/square millimeter, approaching with the intensity before quenching, solved the problem that intensity sharply descended after copper-62 layer quenched.
(5) from the metallurgical microscopic of test specimen section of the present invention, can find out, test specimen (seeing Fig. 1 and Fig. 2) without the RDJY processing, the interface of mother metal and layer is smudgy, most test specimens have a fusion area (thickness is at the 0.0025-0.01 millimeter) between mother metal and layer, and disappear through the test specimen fusion area that RDJY handles, the interface of test specimen matrix and layer is smooth, smooth, fine and close (seeing Fig. 3 and Fig. 4), this variation has shown the creep effect that the layer position produces, proved the correct of inventive concept, high temperature insostatic pressing (HIP) is the method for reinforced metal creep effect, can try out the intensive treatment in metal.
The test that the present invention carries out:
(1) weldment material and disposition:
Mother metal-U.S. 2025 steel (near homemade 20Ni4M0 steel), carbide alloy-YG8 to YG16.
Copper 62 welding wires-standard HS224,905 ℃ of fusing points, silver-bearing copper welding wire-(AG CU15 ZN16 GA24), 680 ℃ of fusing points
Solder flux-be high-quality borax.
Mother metal oozes charcoal handles (the dark 2.0-2.8 millimeter of infiltration layer, case case carbon is 0.95-1.05%).
(2) oxy-acetylene manual welding:
Adopt neutral flame during soldering, only adopt the low-level oxidation flame under a few cases, brazing temperature is seen the scolder fusing point, and the intact back of soldering is the insulation half an hour of blowing out cooling then in 100 ℃ of resistance boxes.
(3) postwelding quench (only being numbered 7 and 8 test specimen in the his-and-hers watches 1).
(4) weldment hip treatment:
Treatment temperature is 250 ℃-350 ℃, and pressure is 35-45MPa, is incubated one hour and lowers the temperature with stove.
The shear strength of weldment sample is measured:
13 millimeters of specimen finish, length 32-40 millimeter (steel matrix length is 20-22), weldment is contained on the special-purpose shearing anchor clamps through the profile reconditioning, carry out strength detection on the WC-60 Material Testing Machine, the basal area (F) of shear strength of known layer (P) and test specimen just can be obtained the shear strength (P1=P/F) of layer.
Table 1 is listed in test specimen shear strength measured value contrast before and after the high temperature insostatic pressing (HIP) in.
Table 1
| Numbering | Scolder | Technology | The test specimen number | Average shear intensity | Reliability index |
| ?1 | Silver-copper | Not carburizing of mother metal-weldering | ????13 | ????22.55 | ????22 |
| ?2 | Silver-copper | Not carburizing of mother metal-weldering-RDJY | ????9 | ????28.88 | ????29 |
| ?3 | Silver-copper | Mother metal carburizing-weldering | ????4 | ????21.22 | ????19 |
| ?4 | Silver-copper | Mother metal carburizing-weldering-RDJY | ????8 | ????31.87 | ????31 |
| ?5 | Copper-62 | Mother metal carburizing-weldering | ????10 | ????27.20 | ????27 |
| ?6 | Copper-62 | Mother metal carburizing-weldering-RDJY | ????7 | ????32.84 | ????32 |
| ?7 | Copper-62 | Mother metal carburizing-weldering-quenching | ????6 | ????17.18 | ????17 |
| ?8 | Copper-62 | Mother metal carburizing-weldering-quenching-RDJY | ????25 | ????25.32 | ????23.3 |
Illustrate: 1) reliability index is meant the index of the shear strength that 60% test specimen reaches.
2) unit of shear strength and reliability index is kilogram/square millimeter.
Claims (2)
1. method that improves carbide alloy and drill rod weldering intensity, its principal character is that the workpiece postwelding is through hip treatment, the hip treatment temperature is 250-350 ℃, pressure is 35-45MPa, under this temperature, keep lowering the temperature with stove in one hour, through evidence the oxy-acetylene manual welding is carried out above after welding treatment, can obtain ideal results with the combination of following different mother metals and scolder.
(1) silver-spelter solder, mother metal is low charcoal steel alloy, oxy-acetylene manual welding, weldment be through hip treatment,
(2) silver-brazing section, mother metal is low charcoal steel alloy carburizing (or high-carbon alloy steel), the oxy-acetylene manual welding, weldment is through hip treatment.
(3) copper-62 scolder, mother metal is low charcoal steel alloy carburizing (or high-carbon alloy steel), the oxy-acetylene manual welding, weldment is through hip treatment.
(4) copper-62 scolder, mother metal is low charcoal steel alloy carburizing (or high-carbon alloy steel), oxy-acetylene manual welding, postwelding quench to weldment, then through hip treatment.
2. according to the described method of claim 1, the hip treatment optimum temperature is 250-300 ℃, and pressure is 35-40MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94109465 CN1042003C (en) | 1994-08-09 | 1994-08-09 | Method for enhancing soldering strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94109465 CN1042003C (en) | 1994-08-09 | 1994-08-09 | Method for enhancing soldering strength |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1116572A true CN1116572A (en) | 1996-02-14 |
| CN1042003C CN1042003C (en) | 1999-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94109465 Expired - Fee Related CN1042003C (en) | 1994-08-09 | 1994-08-09 | Method for enhancing soldering strength |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101804504B (en) * | 2010-02-08 | 2012-07-18 | 深圳市金洲精工科技股份有限公司 | Welding method of precise mini cutter |
| CN110524102A (en) * | 2019-08-22 | 2019-12-03 | 山东省科学院新材料研究所 | A kind of device and method of effective enhancing quality of weld joint |
| CN112008083A (en) * | 2020-08-27 | 2020-12-01 | 山东旭拓新材料科技有限公司 | Austenitic stainless steel and hard alloy composite material as well as preparation method and application thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103682939B (en) * | 2012-09-07 | 2016-09-07 | 佛山市国电电器有限公司 | The terminal of a kind of electrical equipment and the welding method of braid over braid |
-
1994
- 1994-08-09 CN CN 94109465 patent/CN1042003C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101804504B (en) * | 2010-02-08 | 2012-07-18 | 深圳市金洲精工科技股份有限公司 | Welding method of precise mini cutter |
| CN110524102A (en) * | 2019-08-22 | 2019-12-03 | 山东省科学院新材料研究所 | A kind of device and method of effective enhancing quality of weld joint |
| CN110524102B (en) * | 2019-08-22 | 2021-04-02 | 山东省科学院新材料研究所 | Device and method for effectively enhancing quality of welding joint |
| CN112008083A (en) * | 2020-08-27 | 2020-12-01 | 山东旭拓新材料科技有限公司 | Austenitic stainless steel and hard alloy composite material as well as preparation method and application thereof |
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| Publication number | Publication date |
|---|---|
| CN1042003C (en) | 1999-02-10 |
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