CN103320635A - Preparation method of Cu-Sn-Pb-silicate mineral powder sintering wear-resisting copper alloy material - Google Patents
Preparation method of Cu-Sn-Pb-silicate mineral powder sintering wear-resisting copper alloy material Download PDFInfo
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- CN103320635A CN103320635A CN2013102440463A CN201310244046A CN103320635A CN 103320635 A CN103320635 A CN 103320635A CN 2013102440463 A CN2013102440463 A CN 2013102440463A CN 201310244046 A CN201310244046 A CN 201310244046A CN 103320635 A CN103320635 A CN 103320635A
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Abstract
The invention relates to a preparation method of a Cu-Sn-Pb-silicate mineral powder sintering wear-resisting copper alloy material, belonging to the technical field of alloy materials. The alloy is mixed powder which comprises 1%-5% of silicate mineral powder, 5%-% of Pb, 7%-12% of Sn and 77%-82% of Cu. A novel wear-resisting material with good wear-resistance is prepared by using a powder metallurgy method in a sintering mode. The preparation method comprises the following specific process procedures: preparing silicate mineral micro powder, mixing up the powder, pressing a blank (pressing at one time), sintering at one time, pressing for another time and sintering for another time. A product is ultimately prepared.
Description
Technical field
The present invention relates to the copper alloy agglomerated material, specifically a kind of Cu-Sn-Pb-silicate mine powder sintering wear-resistant copper alloy material.Belong to technical field of alloy material.
Background technology
Wearing and tearing are one of three kinds of principal modes losing efficacy of mechanical material, and the loss that China's mechanical means every year causes because of wearing and tearing is up to exceeding 100 billion.Have now in the industrial machinery for the part that bears larger frrction load, general copper and the copper alloy of adopting is as wear-resisting mating material, the problem that exists is that the copper alloy Wear vesistance is good, but wear resisting property is limited, especially the part that uses in engineering machinery often will bear high-load, reciprocal long-term operation, traditional Cu alloy material has much room for improvement work-ing life always.
The sliding surface bearing that the lead bronze alloy generally is used for making and runs up, work under high impact loads and the hot conditions is widely used in the component materials such as automobile, lathe.In recent years, along with improving constantly of International Environmental Protection standard, the Cu alloy material of developing unleaded or low lead has become inexorable trend.
No. 200410079613.5 patent of application on December 8th, 2004, use comprise Cu, Sn, Ni, Zn, mishmetal is raw material, prepared the CuSnNiZnRE alloy pig, and be processed into part, although performance slightly is improved than the partial domestic copper alloy, but it is higher that it makes tooling cost, should not promote the use of.
No. 200620048079.6 patent of on November 22nd, 2006 application utilized the self-lubricating property of graphite, and sintering one deck contains the copper alloy layer of graphite granule on steel backing, but graphite and copper wettability are relatively poor, must affect the tissue intensity of material.
Large quantity research is all being done aspect wear-resistant copper alloy material research and development and the improvement by domestic many colleges and universities, but many achievements in research also only rest on laboratory stage because manufacturing cost is too high, are difficult to industrialization promotion.
The objective of the invention is under the prerequisite of not adding more alloying elements, use cheap mineral composition, improve cheaply the wear resisting property of traditional copper alloy material, and lead content in the reduction copper alloy, be Cu-Sn-Pb-silicate mine powder sintering wear-resistant copper alloy thereby designed a kind of new copper alloy.
Summary of the invention
The invention provides a kind of Cu-Sn-Pb-silicate mine powder sintering wear-resistant copper alloy material, its objective is and use cheap mineral composition, improve cheaply the wear resisting property of traditional copper alloy material, and reduce lead content in the copper alloy, with reduce produce with use in to the harm of environment.
The present invention implements according to following technical scheme
A kind of Cu-Sn-Pb-silicate mine of the present invention powder sintering wear-resistant copper alloy material is characterized in that it comprises following technological process and step:
A. starting material are selected and formed: in consisting of of the mixed powder of quality % raw material silicon hydrochlorate breeze, Pb, Sn and Cu: Cu 77 ~ 82%, and Sn 7 ~ 12%, and Pb 5 ~ 9%, silicate breeze 1 ~ 5%;
B. once the compacting with once sintered: mixed powder is mixed in mixer, once the compacting after powder compression is become green compact, insert carry out in the sintering oven once sintered; The pressure that obsession is used is 300 ~ 400MPa, pressurize 10s; Once sintered temperature is 700 ~ 900 ℃; Adopt hydrogen+nitrogen protection atmosphere, hydrogen: nitrogen=1:4 ~ 1:2; Dwell time 10 ~ 60min;
C: the multiple pressure and resintering: once sintered rear multiple pressure makes organizes more even compact, and physicals is better, carries out resintering and obtain the qualified sintered copper alloy of performance after multiple the pressure; Pressing again used pressure is 500 ~ 700MPa, pressurize 1.5s; The temperature of resintering is 700 ~ 900 ℃, adopts hydrogen+nitrogen protection atmosphere same as described above; Soaking time 10 ~ 60min.
Among the present invention, described silicate breeze is serpentine minerals micro mist, wherein Mg
3[Si
2O
5] (OH)
4Content 〉=90%, grain diameter≤1 micron.
Among the present invention, the thickness of described green compact is 3 ~ 8mm.
Advantage of the present invention and effect
By enforcement of the present invention, the Cu-Sn-Pb-silicate mine powder sintering wear-resistant copper alloy wear rate that obtains the more not identical copper alloy mother metal of silicate breeze powder significantly reduces.
Description of drawings
Fig. 1 is scanning electronic microscope (SEM) figure of the serpentine breeze among the present invention.
Fig. 2 is scanning electronic microscope (SEM) figure on the Cu-Sn-Pb-silicate mine powder sintering wear-resistant copper alloy surface among the present invention.
Fig. 3 is the pin dish frictional wear test device figure among the present invention.(three pawl pin materials wherein are Cu-Sn-Pb-silicate mine powder sintering wear-resistant copper alloy; Be tempering attitude 45 steel of quenching with disk material)
Fig. 4 is the Different Silicon hydrochlorate breeze addition sintered wear-resistant copper alloy wear rate histogram (drawing according to data in the table 2) among the present invention.
Embodiment
Embodiment
Preparation process and the step of the Cu-Sn-Pb-silicate mine powder sintering wear-resistant copper alloy material in the present embodiment are as described below:
1) preparation serpentine minerals micro mist: the serpentine ore through ball milling, is become the powder of granularity≤1 micron.
2) mixed powder: select granularity to be the commercially pure copper of 200 orders, tin, lead powder, join powder by component proportions in the table 1, with the mixed powder 2h of V-type mixer.
3) once compacting and once sintered: four groups of mixed powders are pressed into respectively the green compact of Φ 28mm*8mm through 300MPa, 4 groups of samples are inserted simultaneously in the sintering oven and are heated to 900 ℃ with 10 ℃/min, cool to room temperature with the furnace behind the insulation 60min.
4) the multiple pressure and resintering: four groups of samples carry out multiple pressure through 650MPa pressure respectively after once sintered, insert subsequently and carry out resintering in the sintering oven, cool to room temperature with the furnace after being heated to 900 ℃ of insulation 30min with 10 ℃/min.Finally make product.
The friction-wear test test
Test at the MM-W1 friction wear testing machine.Sample behind the resintering is cut among the figure three-pawl type pin shown in the left side, and (behind the cleaning, drying weigh at electronic balance be m1) is tempering attitude 45 steel of quenching to the mill material, size Φ 30mm disk, and hardness 45HRC, lubricating oil are the YB-46# gear oil.Test parameter PV value 1.4N/mm
2* ms
-1, rotating speed 0.6m/s, test period is 2h.To be weighed as m2 at electronic balance after the cleaning of three pawl pins behind the frictional wear experiment.
The calculating of wear rate: three pawl pins are also dried with ultrasonic cleaning in acetone respectively before and after frictional experiment, and weigh in electronic balance (being accurate to 0.1mg) calculates wear rate as follows
Can find out that from 4 groups of sample wear rate test results (Fig. 4, table 2) the sintered copper alloy wear rate that adds the serpentine micro mist all is lower than the sintered copper alloy that does not add the serpentine micro mist, and the sintered wear-resistant copper alloy that contains 3% serpentine micro mist has the minimal wear rate, illustrate that its wear resisting property is optimum, calculate the sintered copper alloy wear rate that the sintered wear-resistant copper alloy wear rate that contains 3% serpentine micro mist more do not add the serpentine micro mist by table 2 and descended 84%, wear resisting property improves obviously.
The mixing ratio table (wt%) of table 1 starting material powder
Table 2 sample wear rate test result
Claims (3)
1. the preparation method of a Cu-Sn-Pb-silicate mine powder sintering wear-resistant copper alloy material is characterized in that comprising following technological process and step:
A. starting material are selected and formed: in quality %, the consisting of of the mixed powder of raw material silicon hydrochlorate breeze, Pb, Sn and Cu: Cu 77 ~ 82%, and Sn 7 ~ 12%, and Pb 5 ~ 9%, silicate breeze 1 ~ 5%;
B. once the compacting with once sintered: mixed powder is mixed in mixer, once the compacting after powder compression is become green compact, insert carry out in the sintering oven once sintered; The pressure that obsession is used is 300 ~ 400MPa, pressurize 10s; Once sintered temperature is 700 ~ 900 ℃; Adopt hydrogen+nitrogen protection atmosphere, hydrogen: nitrogen=1:4 ~ 1:2; Dwell time 10 ~ 60min;
C: the multiple pressure and resintering: once sintered rear multiple pressure makes organizes more even compact, and physicals is better, carries out resintering and obtain the qualified sintered copper alloy of performance after multiple the pressure; Pressing again used pressure is 500 ~ 700MPa, pressurize 15s; The temperature of resintering is 700 ~ 900 ℃, adopts identical hydrogen+nitrogen protection atmosphere; Soaking time 10 ~ 60min.
2. the preparation method of a kind of Cu-Sn-Pb-silicate breeze wear-resistant copper alloy material according to claim 1 is characterized in that, described silicate breeze is serpentine minerals micro mist, wherein Mg
3[Si
2O
5] (OH)
4Content 〉=90%, grain diameter≤1 micron.
According to claim 1 once the compacting after powder compression is become green compact, a kind of preparation method of Cu-Sn-Pb-silicate mine powder sintering wear-resistant copper alloy material is characterized in that the thickness of described green compact is 3-8mm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103695699A (en) * | 2013-12-20 | 2014-04-02 | 龙工（上海）精工液压有限公司 | Sintered wear-resistant copper alloy material containing mixed silicate mineral powder and preparation method for same |
| CN107099694A (en) * | 2016-02-23 | 2017-08-29 | 上海上隆压缩机制造有限公司 | A kind of wear resistant alloy material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU273434A1 (en) * | Центральный ордена Трудового Красного Знамен | |||
| CN101576118A (en) * | 2009-06-15 | 2009-11-11 | 合肥工业大学 | Unleaded Cu-based sliding bearing material and preparation method thereof |
-
2013
- 2013-06-19 CN CN2013102440463A patent/CN103320635A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU273434A1 (en) * | Центральный ордена Трудового Красного Знамен | |||
| CN101576118A (en) * | 2009-06-15 | 2009-11-11 | 合肥工业大学 | Unleaded Cu-based sliding bearing material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 马少波等: "温度对Cu-Sn10-Pb10减摩复合材料摩擦磨损性能的影响", 《轴承》, no. 12, 31 December 2008 (2008-12-31), pages 33 - 36 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103695699A (en) * | 2013-12-20 | 2014-04-02 | 龙工（上海）精工液压有限公司 | Sintered wear-resistant copper alloy material containing mixed silicate mineral powder and preparation method for same |
| CN107099694A (en) * | 2016-02-23 | 2017-08-29 | 上海上隆压缩机制造有限公司 | A kind of wear resistant alloy material |
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Application publication date: 20130925 |