CN101353739A - Multicomponent silicon brass novel material automobile synchro converter ring - Google Patents

Abstract

The invention discloses an automobile synchronizer gear ring made from a multielement silicon brass material; the synchronizer gear ring is characterized in that: brass Cu is used as a matrix, and added with Al, Ni, Si, Fe, Co and the like to control an intensified phase, so as to optimize the chemical composition of the multielement silicon brass, and form cracks and expansion of the controlling materials of a hard phase on the matrix of the synchronizer gear ring, thus enhancing the strength and the abrasion resistance of the ring gear synchronizer. The synchronizer gear ring is finely forged from special forging blanks to enhance the fineness level and reduce or omit the cutting, and the hardened phase status and granularity are adjusted through an optimized heat treatment process, to form ideal soft matrix and hard-particle abrasion-resistant granularity, and simultaneously the synchronizer gear ring has desirable hardness and strength.

Description

A kind of multicomponent silicon brass novel material automobile synchro converter ring

[technical field]

The present invention relates to the improvement invention of automobile synchronizer tooth ring material, particularly be a kind of invention with multicomponent silicon brass novel material automobile synchro converter ring.

[background technology]

In the prior art, synchro converter ring is the key component of automobile synchronizer, because gear shift ring gear and the gear that is connected are accelerated or decelerated to synchronized shifting at 1-2 in second, because the quick and various friction of this complexity makes the microgroove conical surface of synchro converter ring be in abominable working conditions, known domestic synchro converter ring all adopts copper cast iron casting forging process, processing difficulties.At present, domestic by retrieval more existing units have developed " automobile synchronizer tooth ring " product, as: the Changjiang river, Luzhou, Sichuan machinery company limited, general continent, Wuhan machinofacture company limited, the Lu'an City First Automobile Works, Hubei University Of Technology, the Pacific Ocean, Jiangsu precision casting company limited, Jiangsu Dayang Gears Co., Ltd, Jiangsu SAIC Automobile Synchronizer Works etc. all develop or have produced related products, the product that wherein has adopts the manufacturing of polynary complex brass alloy pipe, and external synchro converter ring belongs to manganese brass and aluminum brass two big series basically, though coefficient of friction is big, wear resisting property is good, but still its deficiency is arranged, major part can only be used for kart.Test shows that the synchro converter ring failure reasons mainly is that the adhesion abrasion is main, and therefore, improving the ring gear wear resistance is the key of dealing with problems.

[summary of the invention]

In view of the problem that known technology exists, purpose of the present invention aims to provide a kind of synchro converter ring that makes and forms the hard phase, and control material crackle and expansion improve its wear resistance and physical strength.

The present invention finishes as follows, its multicomponent silicon brass novel material automobile synchro converter ring, it is to be matrix with brass that its spy 4. levies, add an amount of aluminium, nickel, silicon, iron, its weight percent of cobalt is: Cu:59-63% Al:3.5-4.5% Ni:2.5-4.5% Si:0.5-1.5% Fe:0.5-1.3% Co:0.5-1.0% Mn :≤0.1 Pb :≤0.1 all the other be Zn, finish forge became the automobile synchronizing tooth ring after the novel material that will contain above-mentioned metallic element was cast as blank, improve the blank refinement level, it is lacked cuts or does not cut, then through optimizing thermal treatment, adjust sclerosis phase morphology and precision, form the soft matrix stiffened of ideal particle abrasion-resistant tissues, have ideal intensity and hardness simultaneously.

Through testing its mechanical property of multielement silicon brass synchro converter ring: its tensile strength sigma b 〉=600N/mm ²Impelling strength δ 〉=2% hardness is 95-110HRB

The present invention compares with known technology, and having proposed with brass for the first time is matrix, adds elements such as an amount of aluminium, silicon, nickel, iron, cobalt, manganese, lead, zinc, makes its chemical composition change form the hard phase, improves the wear resistance and the intensity of product.

Multicomponent silicon brass novel material automobile synchro converter ring according to design motif made of the present invention, will break the synchro converter ring material for a long time by the situation of Japan, U.S.'s monopolization and control, the heavy-duty car production will produce great influence in China, and brings tangible economic benefit and positive result of use.Embodiment is also very simple, as long as the metal that will have above-mentioned element is cast as blank after high temperature melting, finish forge becomes automobile synchronizer tooth ring again, heat-treats through cutting (or not cutting) simply slightly, adjusts sclerosis phase morphology and precision and gets final product.

Claims (3)

1. a multicomponent silicon brass novel material automobile synchro converter ring is characterized in that with brass Cu be matrix, adds Al, Ni, Si, Fe, Co, Mn Pb Zn various trace elements control strengthening phase.

2. multicomponent silicon brass novel material automobile synchro converter ring as claimed in claim 1 is characterized in that the metallic element weight ratio of synchro converter ring is: Cu:59-63% Al:3.5-4.5% Ni:2.5-4.5% Si:0.5-1.5% Fe:0.5-1.3% Co:0.5-1.0%.All the other are Zn for Mn≤0.1 Pb≤0.1.

3. multicomponent silicon brass novel material automobile synchro converter ring as claimed in claim 1 or 2 is characterized in that multielement silicon brass is formed through rough-cast, finish forge and thermal treatment.