A kind of precipitation strengthened brass alloy and its preparation method

A brass alloy, precipitation strengthening technology, applied in the field of alloys, can solve problems such as limitations in application fields

Active Publication Date: 2019-02-12
NINGBO POWERWAY ALLOY PLATE & STRIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to its manual, various properties can basically meet the above-mentioned industry needs, but the conductivity is only 10%-16% IACS, and the application field is limited

Method used

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  • A kind of precipitation strengthened brass alloy and its preparation method
  • A kind of precipitation strengthened brass alloy and its preparation method
  • A kind of precipitation strengthened brass alloy and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-45

[0044] Wherein the alloy of embodiment 1 is national standard H70 (American standard C26000), the alloy of embodiment 2 is national standard HSn70-1 (American standard C44300), the alloy of embodiment 26 is H80 (American standard C24000), the alloy of embodiment 27 is QSn6.5-0.1 (American Standard C51900), the alloy of Example 35 is H85 (American Standard C23000), and the alloy of Example 44 is H90 (American Standard C22000).

Embodiment 3-17

[0045] Examples 3-17: each group is prepared according to the designed composition, wherein Mg and P are respectively added as Cu-Mg master alloy and Cu-P master alloy. Each group of ingredients is melted and cast ingots in a 10Kg intermediate frequency furnace, turned into Φ50 extrusion ingots, extruded into Φ15 billets, and the billets are water-cooled. The components of each embodiment are shown in Table 1 and Table 2. The components are post-furnace components, and samples are taken from the billets after extrusion. The extruded billets are processed in sequence as follows: 60% processing rate cold drawing→550°C aging heat treatment for 5h→30% processing rate cold drawing→450°C aging heat treatment for 4h→20% processing rate cold drawing→280°C aging heat treatment for 3h→cleaning. The finished product is processed into a Φ7 standard tensile sample, and the tensile test is performed on the sample on a 10-ton hydraulic drawing machine to test its tensile strength, yield stre...

Embodiment 46-55

[0051] For the production of rods, including Examples 46-55, the ingredients of each example are formulated according to the design components, and P is added in the form of CuP master alloy. The components of each embodiment are shown in Table 3, and the components are post-stove components, and samples are taken from the billets after extrusion.

[0052] Among them, Examples 46-50 were smelted in a power frequency furnace, the smelting temperature was 1080°C-1180°C, and vertical semi-continuous casting was used to cast Φ170mm ingots. Examples 51-55 were smelted in an intermediate frequency furnace at a melting temperature of 1150°C-1250°C. After alloying, the furnace was poured into an intermediate frequency holding furnace, and horizontal continuous casting was used to produce Φ170mm ingots.

[0053] Extrude Φ15 straight rods in a 1250T horizontal extrusion machine with double-flow water seals. Wherein the extrusion temperature of Examples 46-50 is 700°C-780°C, and the ext...

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Abstract

The invention relates to precipitation enhanced type brass alloy and a preparation method thereof. The precipitation enhanced type brass alloy is characterized by comprising, by weight, 68%-92% of copper, 6%-30% of zinc, 0.01%-3% of cobalt and 0.01%-0.35% of phosphorus. The weight sum of the copper and the zinc is larger than 96%, and the weight sum of inevitable impurities is smaller than 0.2%. The brass alloy can be used for preparing sheets, bars, plates and the like. The cost of the alloy can be lowered obviously. The precipitation enhanced type brass alloy is lower in stress relaxation rate, more resistant to creep, higher in yield ratio, higher in elasticity modulus and better in electric conductivity.

Description

technical field [0001] The field of alloys involved in the present invention specifically refers to a precipitation-strengthened brass alloy and a preparation method thereof. Background technique [0002] High-strength, high-elasticity, fatigue-resistant, and corrosion-resistant copper alloys represented by tin phosphor bronze are widely used in connectors, terminals, relays, springs, and switching components in medical, aviation, communication, automotive, and electrical and electronic industries. But first of all, it belongs to the bronze series alloy with high copper content, and China is a country short of copper resources. In 2014, the consumption of refined copper was 8.72 million tons, of which 3.59 million tons were imported, and the import ratio reached 41%. Copper prices continued to remain high. Moreover, tin phosphor bronze contains a relatively high content of the more expensive metal Sn, and the price of raw materials leads to a high price of the product. As C...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/04C22C1/02
Inventor 李建刚马骏胡仁昌赵红彬徐睿达
Owner NINGBO POWERWAY ALLOY PLATE & STRIP CO LTD
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