CN1285442C - High-strength silver-less soft brazing filler alloy - Google Patents
High-strength silver-less soft brazing filler alloy Download PDFInfo
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- CN1285442C CN1285442C CN 200310110785 CN200310110785A CN1285442C CN 1285442 C CN1285442 C CN 1285442C CN 200310110785 CN200310110785 CN 200310110785 CN 200310110785 A CN200310110785 A CN 200310110785A CN 1285442 C CN1285442 C CN 1285442C
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Abstract
The present invention relates to a high-strength silver-free solder alloy. The high-strength silver-free solder alloy is characterized in that the alloy comprises the components, in weight percentages, 8 to 16 percent of Sn, 11 to 16 percent of Sb, 0.5 to 3.0 percent of Cu, 0.5 to 5.0 percent of Bi, 0.01 to 0.5 percent of P or Re and Pb in balancing amount. The alloy has the advantages of low melting temperature of 240 to 253 DEG C, high intensity (sigma b is larger than or equal to 243PMa and tau b is larger than or equal to 191MPa), low production cost, etc.; the high-strength silver-free solder alloy does not contain toxic elements of cadmium and arsenic or noble metal. The alloy is suitable for the soldering of steel cables of middle-tonnage and large-tonnage truck cranes.
Description
Technical field: the present invention relates to lead-containing alloy, particularly high strength solder lead-containing alloy is used for mother metals such as brazed copper and alloy thereof, steel, stainless steel, in being used in particular for, the soldering of large-tonnage autocrane steel wire rope.
Background technology: in recent years, countries such as Japan, Germany in, extensively adopted the steel cable termina soldering tech on the large-tonnage autocrane.For strengthening the intensity of soldered fitting, most of producers adopt solder brazing.Because solder brazing (the solder fusion temperature is more than 450 ℃) obtains higher strength of joint than solder (the solder fusion temperature is below 450 ℃).The shortcoming of solder brazing is that brazing temperature is too high, causes easily by the brazing metal grain growth.So used solder, and the low (σ of the strength of joint of solder
b=～50Pma, τ
b=～30MPa), the steel wire rope in can not welding, on the large-tonnage autocrane.A kind of high strength soft solder has been invented in the Germany, and its standard is DIN3029-72, and its composition is (weight %): Sn9～11, Sb9～11, Cd1.7～2.5, Cu0.3～0.7, As0.3～0.7, the Pb surplus, but in this soft solder soldering, the steel wire rope of large-tonnage autocrane.But this soft solder contains poisonous Elements C d and As, can damage health and contaminated environment.CN 1120595A discloses a kind of high strength soft solder lead-base alloy, and its composition is (weight %): Sn8～15.5, Sb11～16, Cu0.5～2.5, Ag0.5～2.0, P or Re0.01～0.5, Pb surplus, this soft solder have fusion temperature low (240～254 ℃), intensity height (σ
b〉=241Pma, τ
b〉=190MPa) advantage, and do not contain poisonous Elements C d and As, but in the soldering, the steel wire rope of large-tonnage autocrane, and in being applied to, the soldering of large-tonnage autocrane steel wire rope.But this soft solder contains precious metals ag, and cost is higher.
Summary of the invention: the objective of the invention is to, overcome the deficiency of prior art, a kind of harmful metal that neither contains is provided, do not contain precious metals ag, high strength soft solder that cost is lower again.
Technical scheme of the present invention is that on the basis of CN 1120595A technology, the change alloying component is removed metal A g, other constituent content is done suitably to adjust, and add element Bi.By the technical program, can reach purpose of the present invention.
The feature of high strength soft solder alloy of the present invention is that said alloy contains (weight %): Sn8～16, Sb11～16, Cu0.5～3.0, Bi0.5～5.0, P or Re0.01～0.5, Pb surplus.
Preferential alloying component (weight %) of recommending is: Sn9～14, Sb11～14, Cu1～2.5, Bi1.0～4.0, P or Re0.1～0.3, Pb surplus.
In the present invention, owing to the metal A g that has removed among the CN 1120595A, the fusion temperature of solder can raise to some extent, and intensity has a little decline.For this reason, suitably improved the content of Sn and Cu in the present invention, can suitably improve the intensity of solder, made the intensity of solder among the intensity of solder of the present invention and the CN 1120595A suitable; Addition element Bi0.5～5.0% can make the fusion temperature of solder descend to some extent in the present invention, makes the fusion temperature of solder among the fusion temperature of solder of the present invention and the CN 1120595A suitable, thereby reaches the purpose of removing precious metals ag, reducing the solder cost.
Advantage of the present invention and effect: compare with prior art, the present invention has following advantage:
1, compare with above-mentioned German soft solder, the present invention does not contain poisonous element, and is very little to human body and environmental hazard.
2, compare with solder among the CN 1120595A, the present invention is containing metal silver not, has both saved noble metal silver, makes the brazing filler metal alloy cost reduce by 20～50% again.
Description of drawings: Fig. 1 for in the soft solder brazing filler metal one of the present invention, the joint form schematic diagram of large-tonnage autocrane steel wire rope.(1) is steel wire rope among the figure, and (2) are fitting sleeve, and (3) are soft solder of the present invention.
The specific embodiment:
Embodiment 1～6
By composition shown in the table 1 each alloying element is mixed, become the welding rod of (15～22) * (15～20) * 320mm to measure its solid-liquid phase line, density and mechanical property (hardness, tensile strength sigma then by general metallurgical technology founding
b, shearing strength τ
b) also compare with the solder performance of German DIN3029-72 standard, it the results are shown in Table 2.As seen from Table 2, solder of the present invention is approaching with the main performance of German solder, and is also similar with the performance of the solder of CN 1120595A, and shearing strength is more excellent than German solder.
With the solder of the embodiment of the invention 3 on one on brazing filler metal one Φ 0.18 * 19 of Hunan Heavy Machinery Plant steel wire rope, two of 40Cr fitting sleeves, joint form as shown in Figure 1.On 30 tons of stretching-machines, the maximum breaking stress of the following steel wire rope of different temperatures is respectively 136kN (+80 ℃), 141kN (60 ℃), 590kN (room temperature); Result of the test, steel wire rope is broken, and fracture position is respectively 87～97mm from the distance of welding point, 202～249mm, 151～249mm, fitting sleeve and brazing filler metal alloy are not found breakoff phenomenon.These experimental results show, during solder of the present invention can satisfy fully, the soldering needs of large-tonnage autocrane steel wire rope.
Table 1
| Specimen coding | Alloying component (weight %) | ||||||
| Sn | Sb | Cu | BI | P | Re | Pb | |
| Embodiment 1 | 8.0 | 11.0 | 1.2 | 3.0 | 0.1 | - | Surplus |
| Embodiment 2 | 12.0 | 11.0 | 1.0 | 2.0 | 0.01 | - | Surplus |
| Example example 3 | 14.0 | 16.0 | 3.0 | 5.0 | 0.3 | - | Surplus |
| Embodiment 4 | 15.5 | 13.0 | 0.5 | 2.0 | 0.02 | - | Surplus |
| Embodiment 5 | 9.0 | 11.5 | 1.5 | 1.0 | - | 0.08 | Surplus |
| Embodiment 6 | 13.0 | 14.0 | 2.0 | 1.5 | - | 0.5 | Surplus |
Table 2
| Specimen coding | Solidus | Liquidus curve | Density | Hardness | σ b | τ b |
| (℃) | (℃) | (g/cm 3) | HV | (MPa) | (MPa) | |
| Embodiment 1 | 245 | 250 | 9.74 | 287 | 244 | 193 |
| Embodiment 2 | 243 | 249 | 9.75 | 295 | 246 | 195 |
| Embodiment 3 | 241 | 248 | 9.77 | 292 | 247 | 193 |
| Embodiment 4 | 240 | 247 | 9.80 | 290 | 243 | 192 |
| Embodiment 5 | 244 | 252 | 9.78 | 291 | 245 | 194 |
| Embodiment 6 | 245 | 253 | 9.76 | 290 | 243 | 191 |
| DIN3029-79 | 240 | 248 | 9.89 | 320 | 250 | 160 |
Claims (2)
1, a kind of no silver-colored high strength soft solder alloy is characterized in that said alloy contains (weight %): Sn 8～16, and Sb 11～16, and Cu 0.5～3.0, and Bi 0.5～5.0, P or Re 0.01～0.5, Pb surplus.
According to the alloy of claim 1, it is characterized in that 2, said alloy contains (weight %): Sn 9～14, Sb11～14, Cu 1～2.5, and Bi 1.0～4.0, P or Re 0.1～0.3, Pb surplus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310110785 CN1285442C (en) | 2003-10-22 | 2003-10-22 | High-strength silver-less soft brazing filler alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310110785 CN1285442C (en) | 2003-10-22 | 2003-10-22 | High-strength silver-less soft brazing filler alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1608789A CN1608789A (en) | 2005-04-27 |
| CN1285442C true CN1285442C (en) | 2006-11-22 |
Family
ID=34759230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310110785 Expired - Fee Related CN1285442C (en) | 2003-10-22 | 2003-10-22 | High-strength silver-less soft brazing filler alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1285442C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101280433B (en) * | 2007-12-31 | 2010-06-02 | 浙江工业大学 | Connecting method of titanium-based noble metal electrode and cathode in electrolytic apparatus, and alloy material |
| CN110125571A (en) * | 2019-06-21 | 2019-08-16 | 深圳市唯特偶新材料股份有限公司 | A kind of high intensity low-temperature lead-free solder and its solder(ing) paste |
| CN112621011B (en) * | 2020-12-10 | 2022-02-22 | 北京有色金属与稀土应用研究所 | High-strength lead-based alloy solder and preparation method thereof |
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2003
- 2003-10-22 CN CN 200310110785 patent/CN1285442C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1608789A (en) | 2005-04-27 |
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Application publication date: 20050427 Assignee: Kunming Sunlight Science & Technology Co., Ltd. Assignor: Li Zhiping Contract record no.: 2012530000046 Denomination of invention: High-strength silver-less soft brazing filler alloy Granted publication date: 20061122 License type: Exclusive License Record date: 20120815 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061122 Termination date: 20161022 |
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| CF01 | Termination of patent right due to non-payment of annual fee |