CN1050636C

CN1050636C - Process for producing hard alloy and metallic composition material

Info

Publication number: CN1050636C
Application number: CN96116892A
Authority: CN
Inventors: 丁刚
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-04-11
Filing date: 1996-04-11
Publication date: 2000-03-22
Anticipated expiration: 2016-04-11
Also published as: CN1148095A

Abstract

The present invention discloses a production process of a hard alloy and metal composite material. The process comprises the steps of preparing metal powder materials, mixing, electrode pressing, casting electroslag and finishing products. The production process is simple, and the quality of the products is easy to control. In the process, the products are formed by that the electrodes pressed by the metal powder are melted and crystallized after the melted electrodes are stirred and uniformly mixed in an electromagnetic field; therefore, the performance consistence of the products is good, and the bonding force of two phases is strong; the external dimension of the products is not limited by the process so that the deficiency of traditional process production is weakened or avoided.

Description

Wimet and metal composite production technique and equipment

The present invention relates to a kind of powder metallurgy novel process, and the equipment of realizing this novel process.

Put down in writing from " powder metallurgy technology " book, the technology of producing WC-Co system, TiC-Co series hard metal and production iron-based, copper base, lead base metal composite both at home and abroad is: metal powder material preparation-ginseng glue-batch mixing-moulding-oven dry-presintering-sintering-finished product, this complex manufacturing, facility investment is big, and the product performance consistence is poor, a little less than the two-phase bonding force, fragility is big, toughness is low, when producing metal composite, a little less than body material and the strongthener bonding force.

The objective of the invention is to provide a kind of production technique simple, product performance high conformity, Wimet that body material and strongthener bonding force are strong and metal composite production technique and the equipment of realizing this technology.

Production process of the present invention is metal powder material preparation-mixing-electrode compacting-electroslag casting-finished product.

At first with two kinds or the proportioning preparation in accordance with regulations of two or more metal-powder, the metal-powder for preparing is placed on the mixer and mixes, the metal-powder that thorough mixing is good is put into electrode die and is pressed into electrode, and with the fusing of the electroslag in the molten bath, the electroslag of fusing is a slag bath.Electrode is installed on the electrode holde and with positive source is connected, at this moment the head of electrode is put into the slag bath in smelting furnace molten bath; Electrode can also be a bimetallic electrodes, and the top of smelting furnace is cover plate, and the middle part is a crystallizer, and the bottom is for drawing cast panel and being connected with power cathode, and crystallizer internal cavity is a straight-tube shape; Plug is installed in heart position therein, and the crystallizer outside is equipped with magnetic stirrer, connects power supply, and electrode melts gradually and moves downward gradually, draws cast panel and moves down the product that promptly obtains the crystallizer internal cavity shape gradually.

When using this invention to produce Wimet and metal composite, production technique is simple, and the quality of product is easy to control, owing to be electrode melting in this method, and under the stirring of electromagnetic field, make it mix more even post crystallization and the product that forms with the metal-powder compacting, so the consistency of performance of its product is good, the two-phase bonding force is strong, and the physical dimension of its product is not subjected to the restriction of technology, can weaken or avoid the defective in the traditional technology production.

Be described further in conjunction with the embodiments with reference to the accompanying drawings below.

Fig. 1 is first embodiment of the invention figure.

Fig. 2 is second embodiment of the invention figure.

Fig. 3 is third embodiment of the invention figure.

Fig. 4 is fourth embodiment of the invention figure.

Embodiment 1: with metal-powder WC and Co proportioning preparation in accordance with regulations, the metal-powder of preparation is placed on the mixer and mixes, the metal-powder that mixes is put into electrode die be pressed into electrode 3, the electrode contact 2 on electrode 3 tops is connected with electrode holde 1, electrode holde 1 and 12 anodal connections of power supply.Electrode 3 is put into the molten bath of smelting furnace, and the top in molten bath is slag bath 6, and the bottom is molten molten metal, 7.Cover plate is arranged at the top of smelting furnace, and there is hole the cover plate central position, and electrode passes therethrough; The middle part is a crystallizer 5, and the bottom is drawn cast panel 11 and is connected with power supply 12 negative poles.Crystallizer 5 inner chambers are straight-tube shape; Outer wall one upper lateral part has water outlet 4, and water-in 8 is arranged at the bottom.Connect electrode supply 12, institute adds melting voltage and electric current can draw according to " electric-arc furnace steelmaking ", the position that electrode 3 contacts with slag bath consumable electrode 3 gradually moves downward gradually, draws the product 9 that promptly obtains crystallizer 5 cavity shapes on the cast panel 11, and moves down gradually.There is one deck skull 10 product 9 outsides of deviating from crystallizer 5.

Embodiment 2: in crystallizer 5 outsides magnetic stirrer 13 is installed, the molten molten metal 7 of 13 pairs of fusings of this magnetic stirrer carries out induction stirring mixes it.Other technological process and embodiment 1 omit together.

Embodiment 3: the central position at crystallizer 5 inner chambers is equipped with plug 14, and plug 14 first halves are in molten molten metal 7, and product 9 centers that generate of crystallization have the hole identical shaped with plug 14 thus.Other technological process and equipment and embodiment 1,2 omit together.

Embodiment 4: when the compacting bimetallic electrodes, and the electrode 3a of a kind of material of compacting, and then the another kind of material electrode 3b of pressing and wrapping outside this electrode earlier.With the electrode that two kinds of differing materials are made, the material of resulting product distributes corresponding with its bimetallic electrodes, and promptly the material in product 9 centres and electrode 3a are together; The material at peripheral position and electrode 3b are together.Other technological process and equipment and embodiment 1,2 omit together.

Embodiment 5: the production technique of metal composite is earlier with matrix metal powders A l, strongthener Al ₂O ₃Prepare to scale, mix, other technological process and embodiment 1 omit together.The method and apparatus of

embodiment

2,3,4 all is fit to metal composite, slightly.

Claims

1, a kind of Wimet and metal composite production technique, it is characterized in that: metal powder material preparation-mixing-electrode compacting-electroslag casting-finished product, concrete operations are as follows: at first with the proportioning preparation in accordance with regulations of two or more metal-powder, the metal-powder for preparing is placed on the mixer and mixes, the metal-powder that mixes is put into electrode die be pressed into electrode, electrode is installed on the electrode holde and with positive source is connected, electroslag in the molten bath is melted, the electroslag of fusing is a slag bath, at this moment the head of electrode is put into the slag bath of smelting furnace, connecting power electrode melts gradually, connect the electromagnetic field power supply, electromagnetic field stirs the molten molten metal of fusing, electrode moves downward gradually, draw the product that can obtain the crystallizer internal cavity shape on the cast panel, the electroslag in the slag bath is by being base with Calcium Fluoride (Fluorspan) or aluminium sesquioxide, and is furnished with calcium oxide, magnesium oxide, manganese oxide, the polynary system slag system that rare earth or rare earth oxide are formed.

2, the employed equipment of a kind of claim 1 production technique, wherein cover plate is arranged at the top of smelting furnace, there is hole the cover plate central position, electrode passes therethrough, electrode contact is connected with electrode holde, electrode holde is connected with positive source, the top in molten bath is slag bath, the bottom is molten molten metal, the middle part of smelting furnace is a crystallizer, and outer wall one upper lateral part has water outlet, and water-in is arranged at the bottom, the bottom of smelting furnace is drawn cast panel and is connected with power cathode, it is characterized in that: at the outside magnetic stirrer of installing of crystallizer.

3, equipment according to claim 2 is characterized in that: the central position of crystallizer internal cavity is equipped with plug.