JPS58157929A - Dry sintered friction material - Google Patents

Abstract

PURPOSE:To obtain the titled Cu-base material having a relatively high coefft. of friction, improved attacking action on its opposite material, and improved squeaking resistance by blending Cu with Sn, Zn, a metallic oxide consisting of hard particles, graphite, MoS2, Pb and CaF2 in a prescribed weight ratio. CONSTITUTION:This dry sintered friction material is made of a sintered Cu alloy consisting of, by weight, 60-80% Cu, 3-10% Sn, <=15% Zn, a metallic oxide consisting of hard particles such as Al2O3, 3-10% graphite, 1-5% MoS2, <=10% CaF2. This friction material has a relatively high coefft. of friction such as about 0.4-0.5, resistance to thermal and water fading phenomena, improved attacking action on its opposite material, and improved squeaking resistance.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a copper-based professional hook machining tool that has a relatively low coefficient of friction, and is also improved in its aggressiveness and sound against opposing materials. %.

Traditionally, asbestos-based dry friction II materials, including dry O friction shoes and play materials, have a friction coefficient O reduction from the water fade structure.

Made of good copper-based materials, the friction caused by water fade phenomenon
Although it has a low friction coefficient, it has the disadvantage of having a lower coefficient of friction than the asbestos-based friction group III.

Furthermore, if the coefficient of friction is very high, there will be a lot of wear compared to 0, so it is required to simultaneously solve the contradictory points 8111i from the picture of the material composition.

The present invention is set to the above-mentioned 0 point, and in the Koshiki-shiki-tsumugi JIIIAJit family consisting of autologous O-tsumugi associations, the -1 alloy has a weight ratio of 60 to 80 -1 copper and 3 to 1 tin. °
0I11, zinc 1611 or less, metal saponified material consisting of hard particles 3 to gos, a plow 3 to 10%, molybdenum disulfide 1
Dry fIaIliJllIIA material containing ~ss1 lead 8- or less and calcium heptadide 1G11 or less tas 40''t@.

Below, the concept +1 regarding the dry-type Oma wire material of the present invention will be explained.
Make one bird.

Motoya@Okenbuhosomaka material is made of a sintered alloy consisting of copper, tin, and zinc as the three main components. With conventional asbestos-based friction materials, the friction coefficient is
However, the heat fade phenomenon mentioned above, water fade! IJIK
Iron-based sintered I* materials with low resistance to
It has the disadvantage of low wear resistance due to rust problems.

From these points, in the present invention, the copper-based matrix material K11i is selected, and its composition is 60 to 80 s of steel, 3 to 3 of tin, in a weight ratio (the same applies hereinafter) to all types of sintered friction materials.
10-ton and zinc 151 or less yoke H [selected. This choice of shaft circumference O is based on consideration of stability in the direction of friction. In other words, the above additive amount is within the appropriate range in order to stabilize the copper-based matrix material, material strength, friction during braking, and suppress the occurrence of cracks and increase in single track. This is what was said. In this case, zinc is added within the range where the meaning of substitution for tin is within the range of 6D1 performance II.

The professional sintered abrasive material of the present invention also contains alumina (mulsom) and silica (stow) as corrosion-resistant components.
), metal oxides t3 to 20- which are made of hard particles such as mullite (3-2SiC4) are contained. This content is determined from the preferred range of the effect of increasing friction scratches and scraping off reaction products in the deposits generated at specific gravity II. If the amount is too small, and if it is too large, it will attack the mating material too sensitively, so a range of 3 to 20 is preferable. In addition,
The hardness of the metal oxide is preferably 4 or more on the Mohs scale of 10 on a diamond diamond scale.

In addition, the dry sintered friction material of the present invention contains graphite 3-10-1 molybdenum disulfide (Ko8x) 1-15 as a lubricating component.
-1 lead (P'b) 8- or more and calcium fluoride (c
ayg) less than 10%.

The selection criteria were from improved aggressiveness against opposing materials and retention of a high J1111 coefficient for high-quality WAK & K.

In other words, these components are converted into graphite and M during the temperature rise process.
O8! , (AlFz □Jli exhibits lubricity in each at range, and @# property in each temperature range, and when exceeding each i1 direct range, it acts as a friction improver. Work (and 41KCal)
? 2. It has a lubricating effect under wet friction conditions, and from the woodcutter's experience, it has an aggressive property against the other material.
It was also found that it has a lil effect. In this case, when lead is added, the JllIII coefficient decreases in the negative direction, but on the other hand, it is expected to improve squeal and wear resistance. Therefore, the dry sintered friction material of the present invention has a relatively low *m coefficient of about 0.4 to 0.5;
Resistance to heat fade phenomenon, water 7ade phenomenon is also excellent)
, on the other hand, the aggressiveness towards the mating material and the squeaking are improved.

Next, an embodiment of the dry sintered Jllll bag material of the present invention will be described.

As a 11 mm material for Kenbu-Konbon of this book @ Ming, a sample of Tomi-G was prepared as a soft material of Mu-D1 subordinate wood. Its component composition (unit weight %) is as shown in the following table.

Next, the performance of the above A to G was compared using a constant speed 2*m tester. This is a mating plate Wr-pressed consisting of two trial pieces tFG-20, and the conditions at that time are as follows.
Capture speed is 20 m/a・asm pressure is 5~.

As a result, M~D of the present invention is all 0.4~0.5
It had a relatively high friction coefficient within the range of 1, did not attack the mating plate, and was also excellent in heat fade resistance (i). Also, I was struck by a bark that was more than able to withstand the noise level.

Page 7 Contrary to this, 1 in the conventional column does not attack the opponent's board, but shows a slightly inferior result in heat fade resistance, and ν is superior in heat resistance to fade, but attacks that attack the opponent's board with a large umbrella. In addition, G's 4, which has excellent 11Uk7 aid, attacked the opponent's board with extreme pressure.

In addition, in the dry sintered friction material of the present invention, the addition effect of (a) is significant, and the amount of ToD% OFF! was found to be within a preferable range of 10 min. or less in various camphor tests. In this case, anything over 1 ost was excluded as it would increase the amount of wear.Also, with regard to metal oxidation, we conducted a separate test and found that a Mohs hardness of 4 or higher is suitable. It has been found that the present invention can also be applied to the conversion of light, etc. to gold isa.

As explained above, the present invention provides a bronze-based dry sintered friction material with a specific component composition in which 7) Calcilla & chloride is added. This is the place where the g fee is provided.

? 8M 1982-157929 (8) Firstly, a dry sintered friction material having a stable friction coefficient age is provided. In the present invention, a material having a relatively high friction coefficient of about 0.4 to 0.5 and excellent heat resistance and fade resistance is used. This means that a stable JlI11 surface can be obtained even when the bone is slid at a high speed, and it can be said that it is highly suitable for use in automobiles.

#! 2, a dry fa Ayugun II material with improved aggressiveness and squeaking against the opponent board is provided; generally, 11II! If the I coefficient is 4 lights, the amount of wear will increase, and the aggressiveness against the opponent board will also increase accordingly. but,
In the present invention, the friction coefficient is relatively high, and the wear rate is also suppressed.

Therefore, the improvement to attack 46 leads to a reduction in so-called squealing.

Thirdly, a dry sintered friction material is provided which is also improved against the water fade phenomenon. 1. The present invention is based on a matrix of steel threads, so that it is resistant to the water fade phenomenon.
It is resistant and suitable for two-wheeled automobiles made of agricultural cedar.

If stainless steel is used as the mating plate for this one-metal gold plate, the rust will be detected at the same time.

Claims (1)

[Claims] (1) M-based fine sieve alloy or c) In the dry m* grinding wire category in 1, the sintered alloy IIj has a weight ratio of 60 to 80 copper, fm
3 to 10-1 zinc 1511 or less, metal oxides consisting of hard particles 3 to 20, black #&3 to 10-1 molybdenum disulfide 1 to 511.88 or less, and calcium fluoride 10
Dry-type suits mw with slIA bottom as a pipe sign
Department. +21 The saponified metal is composed of hard particles having a Mohs hardness of 4 or more, and is a t4I mold according to claim 4.
＠- Inui Nishi armor material described in No. 1IX.