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Rareearth containing tin brass pipe and making method thereof

A production method, tin bronze technology, applied to pipes, rigid pipes, pipes/pipe joints/fittings, etc., can solve the problems of environmental pollution, toxicity, and high price

Inactive Publication Date: 2002-07-17
上海威嘉金属材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CuSn8, CuZn15, CuZn37, CuBe2 of German B & K company have high tensile strength and elongation ≥ 50%, but the price is more expensive, and CuBe2 is also toxic during the production process, polluting the environment

Method used

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  • Rareearth containing tin brass pipe and making method thereof
  • Rareearth containing tin brass pipe and making method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The composition (wt%) of embodiment 1 material is:

[0018] Sn 7.5, Al 0.002, Zn 0.01, Ni 0.01, Fe 0.02, Sb 0.02, Bi 0.002, Si 0.002, P 0.20, rare earth La 0.2, the sum of other impurities ≤ 0.15, and the balance is Cu.

[0019] Melting at 1090°C after preparation, casting billets into 25×1.5mm billets, heating to 640°C and extruding, at 600°C, under N 2 Annealed under atmosphere, then rolled and stretched three times, the processing coefficient is controlled at 1.2, and then annealed at 620°C to form a Baden tube of 8×0.17mm, the grain size is 0.017mm, and the specific texture is as follows figure 1 As shown, the tensile strength is 480Mpa, and the elongation is 55%.

Embodiment 2

[0020] Example 2 The rare earths in the material components are mixed rare earths, and the addition amount is 0.25. like figure 2 As shown, the tensile strength is 450Mpa, the elongation is 58%, and the rest are the same

[0021] Example 1.

Embodiment 3

[0022] Example 3 In the material components, Sn is 7.8, P is 0.18, rare earth is Ce, the addition amount is 0.15, and the processing factor is 1.3. Finally, the tensile strength of the Baden tube is 430Mpa, and the elongation is 60%, and the rest are the same

[0023] Example 1.

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Abstract

The present invention relates to a rare earth bearing tin bronze pipe and its production method. Its main composition contains (wt%) Sn 7.0-8.0, P 0.1-0.25 and rare earth 0.1-0.3. The described rare eart his one of La, Ce, Pr and Nd, or La-bearing rare earth or mixed rare earth. The action of rare earth is to inhibit grain growth and make the average grain diameter be 0.01-0.018 mm, then the prepared raw material is undergone the processes of industrial frequency melting at 1070-1130 deg.C, continuously-casting to obtain blank, extruding, annealing at 520-640 deg.C, multiple stretching, working coefficient is 1.1-1.5, and can be made into Bourndon pipe with several specifications, its outside diameter is 1-24 mm, wall thickness is 0.06-1.5 mm, tensile strength is 410-530 Mpa and its percentage elongation is 50-65%, and its cost is low.

Description

technical field [0001] The invention relates to a rare earth-containing tin bronze tube and a manufacturing method thereof, more precisely relates to a Baden tube dedicated to a pressure instrument and a manufacturing method thereof, and belongs to the field of tin bronze tubes. Background technique [0002] The high-performance tin bronze tube is the Baden tube in the production of pressure instruments, and it is the heart part of the instrument. Widely used in chemical, mechanical, petroleum and other industries. Pressure gauges are a consumable product. It is reported that the annual import volume in the US market alone reaches 100 million pieces. Currently, manufacturers who can produce high-performance tin bronze tubes and bend them into Bourton (Baden) tubes sell well in the international market. not much. [0003] Germany's Bachmaier & Klemmer (B & K) company is currently the largest manufacturer of pressure gauge parts in the world. The standard size of the Bourdon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/02F16L9/02
Inventor 方云姚鹤荣薛祖善张国良吴谟鸿
Owner 上海威嘉金属材料有限公司