JPS58147535A - Dry sintered friction material - Google Patents

Abstract

PURPOSE:To obtain a dry friction material showing stably a high coefft. of friction, by providing a specified composition contg. Mn to a bronze type dry friction material. CONSTITUTION:The titled material contains, by weight, 60-80% Cu, 3-20% Sn, 3-20% metallic oxide consisting of hard particles with >=4 Moh's hardness, 3-10% graphite, 1-5% MoS2 and <=15% Mn. Mn reduces an oxidized film of other metals during sintering and increases the degree of sintering. Part of Mn is converted into MnO2 and has an effective action of stabilizing the friction surface. Accordingly, by adding an adequate amount of Mn, a dry friction material having a high coefft. of friction and high resistance to heat and water fade phenomena is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bronze-based dry sintered friction material that has been improved to stably obtain a high coefficient of friction.

Conventionally, dry sintered friction materials have been required to have a high abrasion coefficient and seizure resistance, and to be resistant to the phenomenon of water fade, which appears as a decrease in the number of friction ms, and the like.

However, with conventional bronze-based sintered materials,
-I have not reached KFi until I am satisfied with everything,
Furthermore, it is O from the viewpoint of ingredient composition! One Il shot has been estimated.

The present invention has been made in response to this need, and is therefore a dry sintered friction material made of a bronze-based sintered alloy, in which the sintered alloy has a weight ratio of 60 to 60% of copper and 3 to 30% of tin.
201G, a metal oxide consisting of hard particles with a metal oxide value of 4 or more.
The present invention provides a sintered grinding material containing up to 5 and 15 and below.

The following is about the book*@dry sintering 11*m material. I will clarify.

The dry conversion material of the present invention is used as a bronze-based sintered alloy as a matrix material.

Its composition is based on the weight ratio (
(same below) steel 60~80%, -3~20110 range I
I have selected M-kai. Selection 1 of this range is 11FM
+2) This is due to stability. The matrix material of 1 ounces is related to the IH material 4, and it stabilizes the temperature during the control period, and the heat generated between the other side and the oscillator causes a constant oscillation within the table. Copper coating [Because it is formed, this linear oxide film shows resistance to water 7ade agglomerates, and also has excellent resistance to thermal fade phenomenon, resulting in a stable friction surface. .

Furthermore, in the dry sintered J111M material of the present invention, gold I11 oxide [3 to 2
Contains 0g&. The selection basis for this content is ms
The aim is to be able to withstand the effects of A-Yu, A-Yu, and A-O-Sac. Therefore, depending on the offensiveness against the opponent material,
The content is determined within the range of 3 to 20. In this case, gold Jlli [as a compound, silica (810m2)]
, al2s (mu4sos), mullite (3mujlol-
28101), etc., as appropriate. These gold powders have the effect of scraping off φ waste and reaction products that are generated in the 11% ridges and in the ridges. For this reason, the Mohs hardness f4 with diamond tlo
The above is necessary, and if the quantity is too small, this effect will be small, and if the quantity is too large, the opponent's MV will be attacked radically, so a range of 3 to 20- is suitable.

9. The dry sintered friction material of the present invention impregnates 3-10L of graphite with 1-% 5* of molybdenum disulfide (MO8m). These generally exhibit lubricity in their respective temperature ranges, and act as friction coefficient improvers above their respective temperature ranges. In this case, with regard to lead, which is a common lubricating component, the 114IAf composition of the present invention cannot be maintained due to the thermal fade phenomenon.
The dry sintered friction material of the present invention, which is not added based on the knowledge, has an original coefficient of about α4~cL.
6, and belongs to the high friction coefficient O section, so it is actively excluded from the ship's hold.

Furthermore, dry baking of the present invention! 11% of the material contains less than 15% manganese. This is because the addition of manganese has the effect of reducing the electrified film of other metals during sintering and improving sinterability. Some of the manganese are Mnot K
This is because it has an effective effect on stabilizing lk Yoma*trt.

Therefore, the dry-burned #11 leather material of the present invention is a material with a coefficient of friction, which has excellent resistance to heat fade and water fade, and on the other hand, has improved aggressiveness against the mating material. It is something that exists.

Next, an example of the present @ light dry sintered friction material will be described.

As samples, a dry sintered friction material of the present invention and a conventional comparative material t were manufactured. That is, the sound according to the present invention is excerpted from M~C, and the one related to the conventional comparative material is D.
-G, the component set m (unit weight -) tN as shown in the following table, respectively.

The following table shows the performance of two test pieces pressed against the mating material (FC-20) under the conditions of sliding speed 20TV/-・C1 counter pressure 5% in the above GK Ri ° C1 constant continuous friction II test machine. It was a ratio.

As a result, the present invention is OK! ＠The coefficient was within the range of 7t 0.4 to 0.6, and the wear rate was 4.

Therefore, for M~C, eventually t superior property*r
The effect of adding In to the material was #IX. On the other hand, 01 showed inferior results in terms of heat fade resistance because it did not have the aggressiveness against the D%lri counterpart plate of the conventional example. Furthermore, although Ks P#i and heat resistance to fade were good, the aggressiveness of the opponent board was large, and although Gvi and heat resistance to fade were excellent, the aggressiveness of the opponent board was very large.

Regarding % MnO & loading, we conducted a separate test sound in each column, and as a result, it was found that 15% or less is the suitable range of 8% [If it exceeds 15%, leaching will occur during sintering! P111 Workability of binding - Eliminate from haste, remove metal oxides, mullite, etc. 3
1", and it was found that a Mohs hardness of 4 or more is suitable.

As discussed above, the present invention provides the following effects by adding manganese to a bronze-based dry sintered friction material.

(Providing a dry sintered friction material having a friction coefficient of 11AJIII) According to this research, a high coefficient of friction of about 0.4 to 0.6 is obtained, and the heat resistance is also excellent.

This means that a stable friction surface can be obtained even at high speed sliding, and it can be said to be suitable for automatic single-use KFi.

12+ To provide a dry sintered friction material with improved aggressiveness against the opponent plate; in general, the higher the original oscillation coefficient, the greater the amount of wear on the palm, and the more aggressiveness against the opponent plate. To increase. However, in the present invention, although the coefficient of wear is high, the wear rate is suppressed to 4.

In turn, improvements in aggression can also lead to a reduction in so-called barking.

(3) A dry sintered friction material is provided which is improved even under the water fade phenomenon. In the present invention, by using a bronze-based matrix as a whole and adding manganese, it is resistant to water fading and is particularly suitable for KIK shaped two-wheeled vehicles. In this case, if stainless steel TF is used as the mating plate, the problem of metallization will be solved at the same time.

Claims (1)

[Claims] A dry sintered friction material made of a bronze-based sintered alloy, wherein the sintered alloy contains 60 to 80 copper, 1 to 5 molybdenum monide, and 15 or less manganese in weight ratio. t%
A dry friction material that produces mold.