TWI836286B - Lead-free iron-based pantograph contact material - Google Patents

Abstract

The present invention provides a lead-free iron-based pantograph contact piece material, which includes: a plurality of powders used to make lead-free iron-based pantograph contact piece materials, wherein the conventional powders are replaced with silver or silver alloy powders among the plurality of powders. Lead powder is a lead-free formula pantograph contact piece that will not damage the performance of the contact piece and is also affordable in terms of price.

Description

Lead-free iron-based pantograph contact material

The present invention relates to a lead-free iron-based pantograph contact sheet material, and in particular to a lead-free iron-based pantograph contact sheet material in which lead is replaced by silver or silver alloy.

It is well known that lead is a toxic substance and a heavy metal. Once it enters the human body, it is difficult to be excreted from the body. Medical science has long proven that it not only easily causes liver and kidney poisoning, but also can even cause cancer. Cases of lead poisoning are also common. Have heard. However, the pantograph long and short contact strips, which are widely used consumables in high-speed trains, contain toxic lead.

The main function of the pantograph contact piece is to effectively collect large currents (500~1000A) from 25~32kV high-voltage tram copper cables so that high-speed rail trains can travel safely at speeds up to 300 kilometers per hour. The pantograph contact piece is mainly made of iron-based sintered alloy containing molybdenum, titanium, tungsten and other elements, as well as adding compounds required for lubrication and wear-resistant high-hardness particles. It has the following characteristics in conjunction with high-speed train running:

Good electrical conductivity (high electric conductivity); so that it can effectively collect large currents (500~1000 amperes) to supply the power required by the system.

Good wear resistance (high wear resistance); since this special powder metallurgy product is in direct contact with and wears high-voltage cables, this feature directly affects its service life and safety.

Good lubricating ability; since the pantograph contact piece not only needs to be wear-resistant, but also rubs against the high-voltage cable, the lubricity needs to be increased to increase the service life of the copper cable. In addition, the increase in lubricity can also reduce the noise caused by the friction between the pantograph contact piece and the cable when driving at high speed.

Enough mechanical strength: The use environment of the pantograph contact piece is an important external component traveling at a speed of 300 kilometers per hour, so it must have a certain mechanical strength to meet the safety requirements under accidental impact.

In addition, since the pantograph contact piece must be in contact with the tram copper cable and must withstand high voltages of up to 25~32kV and high currents of 500~1000 amps at any time, its ability to withstand high currents must also be considered to avoid softening of the product. and melting phenomena.

In order to meet the above functions, it is known that the iron-based pantograph contact sheet material is mainly composed of the following multiple different powders; the multiple powders include a high melting point metal powder, a high hardness wear-resistant particle, a high lubricity powder and an iron-based metal powder.

Among them, the high melting point metal powder can come from any one or more of W, Mo, Cr, V or Ti, and the high hardness wear-resistant particles can include Cr, CrV or any one or more of Fe-Cr, Fe-Mo, Fe-V, Fe-W, Fe-Ti alloys (JPH05105995A), or any one or more of TaB2, NbB2, ZrB2, TiB2, ZrN, CrN, TaC or WC (JPH08109453A), or any one or more of Fe-Mo-Si-Cr, Fe-Mo-Si and other intermetallic compounds (JPH05230603A).

In addition to iron, iron-based metal powder can also partially replace the original iron with Cu (JPH06158219A). In order to increase the hardness of the iron substrate, 0.01~0.5wt% carbon, 0.05~0.4wt% nitrogen, 2~5wt% Sn and 0.01~0.5wt% phosphorus (JPH08246110A & JPH2013241629A) can also be added to it, or Ni or Mn can be added to improve the toughness of the substrate.

High lubricity powder mainly comes from lead or lead alloy, metal sulfide or BN, or uses metal silicides such as TiSi2, WSi2 and MoSi2 such as JPH08109453A, which can have high hardness and wear-resistant particle properties at the same time, but has the best lubrication performance It's still lead. Because lead can increase the lubricity between the contact piece and the copper cable, and effectively reduce the friction coefficient, greatly reducing the wear of the two, forming very good protection. Therefore, even if it is known that lead is toxic, iron-based pantograph contact piece materials still cannot avoid using it. For example, the patent of JP No. 2743105 B2 iron-based pantograph current collector folding material contains 2~20wt% lead.

鉛含浸Fe基焼結合金製集電用

板材。 The lead in the iron-based pantograph contact piece material is mixed evenly with high-lubricity lead powder and other high-melting-point metal powders, high-hardness wear-resistant particles and iron-based metal powders, and is directly sintered after pressing and molding. Because the sintered contact piece material generally contains 5~15% pores, it can also be molten liquid lead. The lead-free contact piece is then subjected to post-lead impregnation (lead infiltration) treatment, such as JP No. 2853563 B2 wear resistance

Lead-impregnated Fe-based pyrolysis alloy for current collection

Plate.

Since Japan's Tokaido Shinkansen was officially transferred into operation in 1964, high-speed railways have rapidly attracted many countries to invest in construction due to their advantages of high transportation capacity and speed and convenience. Since the Taiwan High Speed Rail began trial operation in January 1996, with the gradual improvement of connecting roads and transfer supporting measures, the number of passengers carried by the Taiwan High Speed Rail has exceeded 30 million every year since 1997, setting new highs repeatedly, and due to the convenience it provides , comfortable intercity transportation services, gradually replacing the old intra-island aviation market, and thus changing the work and leisure life patterns of many people, meeting the various travel needs of passengers, the vision of the "Western Corridor One-day Life Circle" Already taking shape.

However, in addition to comfort and convenience, the long and short pantograph contact plates, which are consumables used in high-speed trains, contain toxic lead. Since the pantograph contact plates are in direct contact with the high-voltage cables and wear out, the worn lead powder is scattered along the high-speed rail tracks when the high-speed trains run at high speeds.

It is well known that lead is a toxic substance and a heavy metal. Once it enters the human body, it is difficult to be excreted from the body. Medical science has long proven that it not only easily causes liver and kidney poisoning, but also can even cause cancer. Cases of lead poisoning are also common. Have heard. Although most areas along the high-speed rail lines are not densely populated, they are major food-producing areas. Lead is absorbed through land crops and then ingested by all Chinese people through food. The harm to people's health cannot be ignored. As for densely populated urban areas, although the railways have been undergrounded, the pantograph contact plates on high-speed rail trains Lead-containing dust generated by friction with copper cables during driving is more likely to enter the human lungs through breathing in confined underground spaces by passengers waiting at stations and platform staff.

Although the formula of the contact piece has been continuously improved since the introduction of the pantograph contact piece, due to the unique function of lead in the contact piece, toxic lead is always indispensable.

In summary, the iron-based pantograph contact piece material still has shortcomings in the manufacturing process. Therefore, the applicant conducted experiments and research and proposed a lead-free iron-based pantograph contact piece material that will not damage the contact piece. A lead-free formula pantograph contact blade that offers excellent performance while being affordable.

The main purpose of the present invention is to provide a lead-free formula pantograph contact piece that does not use lead at all, does not impair the performance of the contact piece, and is also affordable in terms of price.

To achieve the above-mentioned purpose, according to one solution proposed by the present invention, a lead-free iron-based pantograph contact sheet material is provided, and a lead-free iron-based pantograph contact sheet material is provided, which includes: a plurality of powders to make the lead-free iron-based pantograph contact sheet material; wherein, a silver or silver alloy powder is used to replace the conventional lead powder in the plurality of powders.

Preferably, the plurality of powders include a high melting point metal powder, a high hardness wear-resistant particle, a high lubricity powder and an iron-based metal powder.

Preferably, the high lubricity powder contains 2 to 10 wt% of the silver or silver alloy powder.

Another object of the present invention is to provide a lead-free formula pantograph contact piece that has an extremely low lead content, does not impair the performance of the contact piece, and is also affordable in terms of price.

In order to achieve the above object, according to one solution proposed by the present invention, a low-lead iron-based pantograph contact piece material is provided, which includes: a plurality of powders to produce the lead-free iron-based pantograph contact piece material; wherein, in the Among the plurality of powders, a silver or silver alloy powder is used to replace the conventional lead powder, and the content of the conventional lead powder is less than 1wt%.

The above overview and the following detailed description and attached figures are all for the purpose of further explaining the methods, means and effects adopted by the present invention to achieve the intended purpose. Other purposes and advantages of the present invention will be elaborated in the subsequent description and drawings.

1: Iron-based metal powder

2: High melting point metal powder

3: High hardness wear-resistant particles

4: High lubricity powder

S1-S6: Steps

Figure 1 is a flowchart for the production of lead-containing pantograph contact materials.

The following is an illustration of the implementation of the present invention through specific examples. Those familiar with the art can easily understand the contents disclosed in this specification. Learn about the advantages and effects of this creation.

The inventor of this case conducted many experiments and conducted in-depth research on the role and function of lead in iron-based contact sheets and found that:

Compared with other contact plate elements, lead is a relatively low melting point metal and has good electrical conductivity. Therefore, during high temperature sintering, liquid lead can fill holes of several microns, thereby reducing the resistivity of the contact plate and reducing electrical wear during train operation.

In addition, as far as metal materials are concerned, lead has a very low hardness and is soft, so it can be used as a solid lubricant in the contact piece to reduce the friction coefficient and improve the lubrication effect. Therefore, the element that replaces lead must also have the above three characteristics.

After screening by cycle table, it was found that the hardness and melting point of gold, silver, copper, aluminum, zinc and tin are lower than iron, and they have great potential to replace lead. However, gold is too expensive, so it is removed first. In addition, in the early experiments, it was found that the hardness of zinc is relatively high, especially in the wear test, it was found that it would damage the wear parts (copper cables), so it was also removed first. As for aluminum, although its hardness is not high, it has a very good affinity with iron, and therefore it will generate high-hardness intermetallic compounds under high-temperature sintering, which is easy to damage the wear parts (copper cables), so it is also removed first. For the remaining three, in the development of lead-free formula pantograph contact pieces, the above elements will be added in different dosages, and the best formula will be found by Taguchi method, and finally verified by wear test.

Please refer to Figure 1. Figure 1 is a flow chart for making a conventional lead-containing pantograph contact piece material. The conventional lead-containing pantograph contact piece material can mainly be Produced in two different ways:

One is to directly mix lead powder with other powder raw materials, then press it into a green embryo and sinter it at one time (as shown in Figure 1). Another method is to sinter the lead-free formula first, and then impregnate the lead-free contact sheets with lead.

For details, please refer to Figure 1. Multiple powders including iron-based metal powder 1, high melting point metal powder 2, high hardness wear-resistant particles 3 and lead-containing high lubricity powder 4 are mixed together (such as step S1), followed by step S2 for cold pressing at a pressure of 6.3-8.0 tons/cm2, and then demolding in step S3. The taken-out green embryo is sintered at a high temperature of more than 1150°C in hydrogen or reducing atmosphere in step S4, and after cooling, it is processed into a standard contact piece in step S5, and finally various performance analyses are performed in step S6.

According to the above principle, under the same composition formula and production method as the known lead-containing contact sheet, the contact sheet with copper and tin replacing lead is used as a comparison example. The weight percentage composition of Cu-380 and Cu-400 other than iron is Cr: 14.0%, Cu: 3.5%, Mo: 2.1%, W: 0.2%, S: 1.3%, C: 0.12%, and less than 0.1% of Si, N, P, Mn and other unavoidable impurities. The forming pressure of Cu-380 is 7.6 tons/square centimeter, and the forming pressure of Cu-400 is 8.0 tons/square centimeter. The weight percentage of Sn-380 and Sn-400 other than iron is Cr: 15.6%, Sn: 3.0%, Mo: 2.1%, V: 0.2%, S: 1.3%, C: 0.12%, and less than 0.1% of Si, N, P, Mn and other unavoidable impurities. The molding pressure of Sn-380 is 7.6 tons/square centimeter, and the molding pressure of Sn-400 is 8.0 tons/square centimeter. The following results were obtained after testing. The hardness was tested by the Brinell hardness test, the testing instrument was FB-3000LC, and the test method was carried out in accordance with the ASTM E10-18 specification. The data of each item are as follows:

The experimental results show that the average hardness of the contact sheet does not exceed 120HBS, and the hardness value that meets the standard requirements is between 80 and 120HBS. However, individual data are all above 120HBS, and the average value is also significantly higher than the 100HBS of the contact sheet known to contain lead, indicating that the material is too hard and may damage the copper cable.

As for the electrical test method, it is measured according to the JIS R 7222 voltage drop method, and the impact test refers to the JIS Z2242-05 specification, using Tinius Olsen 64 Impacter, pendulum impact rate = 5.12m/s, pendulum impact energy = 264ft-lbf (358Joule). The specimen is tested without a V-notch. The electrical and impact test results are:

The performance test results show that all four groups of electrical properties meet the JRIS E 6301 specification requirements of less than 0.8 μΩ.m. In terms of impact value, except for Sn-380, which is lower than the specification, the others barely meet the specification requirements of greater than 9.8 Joule.

As for the tensile testing instrument, it is Zwick/Roell Z100 UTM, the test method is carried out in accordance with ASTM E8/E8M-16a specifications. The tensile test results of the four groups of specimens are:

拉伸試驗結果顯示，抗拉強度雖大於170Mpa規格要求，惟從降伏強度與伸長率整體性能觀之，以銅或錫取代鉛後，接觸片材質變得非常脆。綜合硬度、電性、拉伸與衝擊測試結果發現，在接觸片中直接以銅或錫取代鉛後，各項性能明顯不如含鉛接觸片。

The tensile test results show that although the tensile strength is greater than the 170Mpa specification requirement, judging from the overall performance of yield strength and elongation, after replacing lead with copper or tin, the contact piece material becomes very brittle. Comprehensive hardness, electrical properties, tensile and impact test results show that after directly replacing lead with copper or tin in the contact piece, the performance is obviously inferior to that of the lead-containing contact piece.

In another comparative example, within the composition range of conventional lead-containing contact sheets, part of the composition formula conditions were changed, including reducing the metal sulfide, and then the same parameter conditions were used to complete the production of lead-free contact sheets using copper instead of lead. Among them, Cu-80 and The weight percentage composition of Cu-90 other than iron is Cr: 18.0%, Cu: 2.6%, Mo: 2.0%, Ni: 0.2%, S: 1.2%, C: 0.05%, and less than 0.1% Si, N, P, Mn and other unavoidable impurities, the molding pressure of Cu-80 is 7.6 tons/cm2, the molding pressure of Cu-90 is 8.0 tons/cm2; and the weight of Cu-8W and Cu-9W other than iron The percentage composition is Cr: 19.2%, Cu: 2.6%, Mo: 2.0%, V: 0.2%, S: 1.2%, C: 0.05%, and less than 0.1% of Si, N, P, Mn and the rest unavoidable For impurities, the test results of hardness, tensile, electrical and impact are as follows, in the hardness part:

The experimental results show that the average hardness of the four sets of contact pieces does not exceed 120HBS, which meets the specification requirements. As for the impact and electrical parts, the test results are as shown in the following table:

The electrical results all meet the specification requirement of less than 0.8μΩ.m, and the impact value part also all meets the specification requirement of greater than 9.8Joule. The remaining tensile test results are as follows:

Similarly, within the composition range of the conventional lead-containing contact sheets, some of the composition formula conditions are changed, including reducing the metal sulfide, and then the lead-free contact sheets using tin instead of lead are completed according to the same parameters and conditions, in which Sn-10 and Sn-20 are The weight percentage composition other than iron base is Cr: 18.0%, Sn: 1.92%, Mo: 2.0%, S: 1.0%, C: 0.05%, and less than 0.1% of Si, N, P, Mn and other unavoidable Impurities, the molding pressure of Sn-10 is 7.6 tons/cm2, the molding pressure of Sn-20 is 8.0 tons/cm2; and the weight percentage composition of Sn-1W and Sn-2W other than iron is Cr: 19.2%, Sn :1.92%, Mo: 2.0%, V: 0.2%, S: 1.0%, C: 0.05%, and less than 0.1% Si, N, P, Mn and the remaining unavoidable impurities. The test results of hardness, tensile, electrical and impact are summarized as follows , in the hardness part:

The experimental results show that the average hardness of the four sets of contact pieces is slightly more than 120HBS. As for the impact and electrical parts, the test results are as shown in the following table:

The electrical results showed that one of the four pieces failed to meet the specification requirement of less than 0.8μΩ.m, and two pieces failed to meet the specification requirement of greater than 9.8Joule in terms of impact value. The remaining tensile test results are as follows:

Although the tensile test results show that all specimens meet the specification requirements of tensile strength greater than 170MPa, due to the low elongation rate, as well as the comprehensive performance evaluation of hardness, impact and electrical properties, the characteristics of replacing lead with tin are far inferior to those of copper. Replace lead.

Although the contact plates in the above comparison examples that use copper and tin to replace lead can partially meet the specification requirements of lead-free formulas, the material is harder and more brittle, which will damage the copper cables that are rubbed against each other. In addition, the wear resistance of the contact plates will not be as good as that of the lead-containing formula.

Therefore, please refer to Figure 1. Under the same contact sheet manufacturing conditions, this case proposes a formula in which silver or silver alloy powder replaces the conventional lead or lead alloy powder in a plurality of powders. The plurality of powders include iron-based metal powder 1, high melting point metal powder 2, high hardness wear-resistant particles 3 and high lubricity powder 4, and are mixed together to produce a lead-free iron-based pantograph contact sheet material. In this embodiment, the high lubricity powder 2 contains 2-10wt% of silver or silver alloy powder, so that the conventional lead powder content of the contact sheet is less than 1wt%, or even completely lead-free.

According to the same method as above, under the same composition formula and manufacturing method as the conventional lead-containing contact sheet, a contact sheet in which silver replaces lead is used as an embodiment, wherein the weight percentage composition of Pbfree-3 other than iron is Cr: 19.0%, Ag: 3.0%, Mo: 1.9%, S: 1.0%, C: 0.05%, and less than 0.1% of Si, N, P, Mn and other unavoidable impurities, and the weight percentage composition of Pbfree-5 other than iron is Cr: 17.0%, Ag: 5.0%, Mo: 1.9%, S: 1.0%, and less than 0.1% of Si, C, N, P, Mn and other unavoidable impurities. n and other inevitable impurities, the weight percentage composition of Pbfree-8 other than iron is Cr: 15.0%, Ag: 8.0%, Mo: 2.0%, S: 1.1%, and less than 0.1% of Si, C, N, P, Mn and other inevitable impurities, the molding pressure of the three is 7.6 tons/square centimeter; as for the experimental results of replacing the conventional lead powder with silver powder, the hardness, tensile, impact, electrical properties and other properties not only meet the requirements of the specification, but also are consistent with the performance of the original lead-containing formula contact sheet, and are even better than the lead-containing contact sheet in terms of impact and electrical properties. The hardness, tensile, impact and electrical test results are as follows:

As for the resistivities Pbfree-3, Pbfree-5 and Pbfree-8, which are the most critical factors affecting arc erosion, they are 0.410, 0.403 and 0.395μΩ.m respectively, which are better than the 0.453 and 0.438μΩ.m of lead-containing contact sheets. . To sum up, the invention of this case can not only completely replace the conventional harmful element lead in the traditional iron-based pantograph contact piece, but is also better than the conventional lead-containing contact piece in resisting electric wear.

However, under special factors, if lead is still used, the present invention A low-lead contact sheet formula is also proposed, in which the lead content is less than 1.0wt%. It has the same inventive effect as the lead-free formula. This is clearly illustrated through the following examples:

Both lowPb-2 and lowPb-9 samples contain 1.0wt% lead, and lowPb-2 and lowPb-9 contain 2 and 9wt% silver respectively. The hardness, tensile, impact and electrical test results are as follows:

至於lowPb-2與lowPb-9的電阻率則分別為0.418μΩ.m與0.375μΩ.m，同樣均優於傳統含3wt%鉛之接觸片，顯示本案發明在特殊因素下，亦可在小於1.0wt%的低鉛情況，提供電磨耗性能優於習知之含鉛接觸片。

The resistivities of lowPb-2 and lowPb-9 are 0.418μΩ.m and 0.375μΩ.m respectively, both of which are better than the traditional contact sheet containing 3wt% lead. This shows that under special factors, the invention of this case can also provide electrical wear performance better than the conventional lead-containing contact sheet at a low lead content of less than 1.0wt%.

In addition, the wear test was conducted using a pin-on-disk type Bruker UMT TriboLab wear tester, where the pin is a copper cable and the disk is a variety of developed contact pieces. The pin diameter is 3mm, the disk diameter is 38mm and the thickness is 10mm. The wear rate is 1500 & 3000 rpm, and the load is 7~10 Newtons. In order to eliminate the experimental errors caused by different surface roughness, all specimens (including pins and disks) were polished to 1000 sandpaper before the experiment. The five groups of lead-free contact sheet specimens, including Pbfree-3, Pbfree-5, Pbfree-8, lowPb-2 and lowPb-9, were very smooth during the entire wear test process and the friction coefficient could be measured stably. The machine also did not continuously jump or make sharp and loud noises like other lead-free contact sheets, indicating that their wear appearance is the same as that of lead-containing contact sheets.

Further analysis revealed that the friction coefficients of the five groups of lead-free contact sheet specimens were between 0.17 and 0.31, which was consistent with the lead-containing contact sheet, proving that they had good wear resistance. After the wear test, the appearance of the contact sheet (disk) and the copper cable (pin) was inspected and it was found that neither of them had severe wear, nor obvious uneven scratches, and the surfaces where the two contacted each other were very smooth.

In summary, the present invention is a lead-free iron-based pantograph contact sheet material, which uses silver powder to replace the conventional lead powder to produce a lead-free formula pantograph contact sheet that does not use any lead at all and does not damage the performance of the contact sheet. At the same time, the price is also acceptable.

Similarly, people who are familiar with this technology can also imitate the known lead impregnation (lead infiltration) treatment mode, first sintering the silver-free formula, and then subjecting the silver-free contact sheet to silver impregnation (silver infiltration) treatment to obtain a lead-free contact sheet.

The above embodiments are only for illustrative purposes to illustrate the features and effects of the present invention, and are not intended to limit the scope of the substantial technical content of the present invention. Anyone familiar with this art may modify and change the above embodiments without violating the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be as listed in the scope of the patent application described below.

1: Iron-based metal powder

2: High melting point metal powder

3: High hardness wear-resistant particles

4: High lubricity powder

S1-S6: Steps

Claims (4)

A lead-free iron-based pantograph contact sheet material, comprising: a plurality of powders for making the lead-free iron-based pantograph contact sheet material; wherein, in the plurality of powders, a silver or silver alloy powder is used to replace the conventional lead or lead alloy powder, wherein the plurality of powders comprises a high melting point metal powder, a high hardness wear-resistant particle, a high lubricity powder and an iron-based metal powder, wherein the high lubricity powder contains 2-10wt% of the silver or silver alloy powder, wherein the high melting point metal powder is selected from W, Mo, C r, V and Ti, wherein the high hardness wear-resistant particles are Cr or CrV, or selected from Fe-Cr, Fe-Mo, Fe-V, Fe-W and Fe-Ti alloys, or selected from TaB2, NbB2, ZrB2, TiB2, ZrN, CrN, TaC and WC, or selected from Fe-Mo-Si-Cr and Fe-Mo-Si intermetallic compounds. A low-lead iron-based pantograph contact sheet material, comprising: a plurality of powders to make the low-lead iron-based pantograph contact sheet material; wherein, in the plurality of powders, a silver or silver alloy powder is used to replace the conventional lead or lead alloy powder, and the conventional lead content is less than 1wt%, wherein the plurality of powders comprises a high melting point metal powder, a high hardness wear-resistant particle, a high lubricity powder and an iron-based metal powder, wherein the high lubricity powder contains 2-10wt% of the silver or silver alloy powder, wherein the high melting point metal powder is selected One or more of W, Mo, Cr, V and Ti, wherein the high hardness wear-resistant particles are Cr or CrV, or one or more of Fe-Cr, Fe-Mo, Fe-V, Fe-W and Fe-Ti alloys, or one or more of TaB2, NbB2, ZrB2, TiB2, ZrN, CrN, TaC and WC, or one or more of Fe-Mo-Si-Cr and Fe-Mo-Si intermetallic compounds. A lead-free iron-based pantograph contact piece material, which includes: a plurality of powders and silver or silver alloy infiltrated into the pores of the material after sintering through a silver impregnation process to produce the lead-free iron-based pantograph contact piece material ; Wherein, the plurality of powders do not contain conventional lead or lead alloy powder, wherein the plurality of powders include a high melting point metal powder, a high hardness wear-resistant particle, a high lubricity powder and an iron-based metal powder , wherein the pores of the material after sintering contain 2~10wt% silver or silver alloy, The high melting point metal powder is selected from one or more of W, Mo, Cr, V and Ti, and the high hardness wear-resistant particles are Cr or CrV, or selected from Fe-Cr, Fe-Mo, Fe - One or more of V, Fe-W and Fe-Ti alloys, or one or more of TaB2, NbB2, ZrB2, TiB2, ZrN, CrN, TaC and WC, or selected from Fe-Mo- One or more of Si-Cr and Fe-Mo-Si intermetallic compounds. A low-lead iron-based pantograph contact sheet material, comprising: a plurality of powders and silver or silver alloy infiltrated into the pores of the material after sintering by silver impregnation treatment to produce the low-lead iron-based pantograph contact sheet material; wherein the total lead content in the plurality of powders is less than 1wt%, wherein the plurality of powders comprises a high melting point metal powder, a high hardness wear-resistant particle, a high lubricity powder and an iron-based metal powder, wherein the pores of the material after sintering contain 2-10wt% of silver or silver alloy, wherein the high melting point metal powder The powder is selected from one or more of W, Mo, Cr, V and Ti, wherein the high hardness wear-resistant particles are Cr or CrV, or selected from one or more of Fe-Cr, Fe-Mo, Fe-V, Fe-W and Fe-Ti alloys, or selected from one or more of TaB2, NbB2, ZrB2, TiB2, ZrN, CrN, TaC and WC, or selected from one or more of Fe-Mo-Si-Cr and Fe-Mo-Si intermetallic compounds.