CN104152795A - Preparation method of high-chrome-nickel-molybdenum abrasion resistant alloy casting of shallow groove sorter slideway - Google Patents

Abstract

The invention discloses a preparation method of a high-chrome-nickel-molybdenum abrasion resistant alloy casting of a shallow groove sorter slideway. The casting comprises the following components in percentage by mass: 18-25% of chrome, 2-3% of nickel, 1.5-2% of molybdenum, 2.5-3.3% of carbon, 1.5-2% of copper, 1-1.5% of manganese, and the balance of iron. The preparation method can be widely applied to easily worn parts of mining mechanical equipment, in particular to the shallow groove sorter slideway. The preparation method has the advantages of simple and feasible process, less invested equipment and low production cost; and the prepared high-chrome-nickel-molybdenum abrasion resistant alloy casting of the shallow groove sorter slideway has better wear resistance, excellent impact resistance and long service life.

Description

The high chromium nickel of shallow-tank separator slideway molybdenum wear resistant alloy foundry goods preparation method

Technical field

The present invention relates to a kind of wear resistant alloy foundry goods and production technique thereof, be specially the high chromium nickel of shallow-tank separator slideway molybdenum wear resistant alloy foundry goods preparation method.

Background technology

Shallow-tank separator slideway is rich chromium cast iron cast member, the Australian import of general employing, fills a prescription unexposed, is the blockade of breaks through foreign technology, urgent need will be researched and developed not only economy but also have excellent abrasive resistance of one, has the shallow-tank separator slideway foundry goods of impact resistance simultaneously.

Summary of the invention

For overcoming the deficiency of existing shallow-tank separator slideway foundry goods high-abrasive material technology, the invention provides the high chromium nickel of shallow-tank separator slideway molybdenum wear resistant alloy foundry goods preparation method.

For achieving the above object, the invention provides the high chromium nickel of shallow-tank separator slideway molybdenum wear resistant alloy foundry goods, calculate according to mass percent, its composition part and content are: chromium 18-25%, nickel 2-3%, molybdenum 1.5-2%, carbon 2.5-3.3%, copper 1.5-2%, manganese 1-1.5%, all the other are iron.

The invention provides the high chromium nickel of shallow-tank separator slideway molybdenum wear resistant alloy foundry goods preparation method, the method comprises the following steps:

(1) prepare furnace charge: take the furnace charge of its mass percent according to component and content, as radix proportioning, using soft steel as base-material, add the compositions such as copper, molybdenum-iron, nickel plate, high carbon ferro-chrome, low carbon ferrochromium and ferromanganese according to proportioning according to 1 ton of furnace charge;

(2) medium-frequency induction furnace fusing: the raw material of first step proportioning is inserted to melting in medium-frequency induction furnace, and its process neutral and alkali stove uses unslaked lime fouling slag making, covers melting liquid surface, heating and temperature control, between 1550-1600 DEG C, arrives high value for good;

(3) come out of the stove: melting liquid reaches 1600 DEG C just can come out of the stove below in deoxidation, does matter inspection, modified abundant deoxidation before coming out of the stove.Before coming out of the stove, can, at the suitable alterant of Bao Neijia, carry out qualitative change processing;

(4) cast moulding: skim after coming out of the stove, the agent of agglomeration slag, treats that iron liquid leaves standstill five minutes in bag, is poured into the molding flask preparing, and naturally cooling, then heat-treats, and is the high chromium nickel of finished product shallow-tank separator slideway molybdenum wear resistant alloy foundry goods.

The invention has the beneficial effects as follows:

1. the finished product that obtain through above operation, its bending strength/MPa900-1080; Impact toughness/J.cm ^-2>=70-85; More than hardness reaches 56HRC.

2. simple process of the present invention is feasible, and used device is few, low cost of manufacture, and the high chromium nickel of the shallow-tank separator slideway molybdenum wear resistant alloy foundry goods of producing has good resistance to abrasion, has good shock-resistance, long service life simultaneously.

Embodiment

Embodiment a:

(1) furnace charge preparation: take the furnace charge of its mass percent according to component and content, carry out proportioning according to 1 ton of furnace charge as radix, using soft steel as base-material;

(2) medium-frequency induction furnace fusing: add 53% high carbon ferro-chrome and low carbon ferrochromium 350kg in medium-frequency induction furnace, make chrome content in melting liquid reach 18%, carbon content reaches 3.1%, after ferrochrome fusing, adds nickel plate 25-32kg, adds 70% ferromanganese 10-12kg, slag making limit, limit adds 50% molybdenum-iron 40kg, reach 1550 DEG C Deng furnace body temperature, slagging-off, then add 70% ferromanganese 10-12kg, sneak into fine copper 15kg, then sample examination is adjusted chemical composition.Require to keep furnace charge dry, other material can not corrosion.Fusion process neutral and alkali stove can be used unslaked lime slag making, covers melting liquid surface, notes controlling smelting time, should keep iron liquid temp between 1550-1600 DEG C;

(3) come out of the stove: melting liquid reaches 1600 DEG C just can come out of the stove below in deoxidation, does matter inspection, modified abundant deoxidation before coming out of the stove.Before coming out of the stove, can, at the suitable alterant of Bao Neijia, carry out qualitative change processing, microstructure that can refinement alloy, improves mechanical property, before coming out of the stove, adopts matter inspection, modified, and fully deoxidation is made reductor with aluminium, titanium, manganese, silicon etc.;

(4) cast moulding: skim after coming out of the stove, the agent of agglomeration slag, treats that iron liquid leaves standstill five minutes in bag, is poured into the molding flask preparing.In the situation that foundry goods does not occur cold shut, teeming temperature is chosen lower for well, can reduce shrinkage porosite and ardent occurrence probability.Thick and large casting teeming temperature is advisable between 1400-1450 DEG C, and thin light casting teeming temperature should be chosen between 1450-1500 DEG C.Naturally cooling, then heat-treats, and is the high chromium nickel of finished product shallow-tank separator slideway molybdenum wear resistant alloy foundry goods.

The chemical composition of product and physical properties in embodiment a:

Embodiment b

According to embodiment a same processes, by 53% high carbon ferro-chrome and low carbon ferrochromium 400kg, impel chromium content in iron liquid to reach 21%, carbon content to 3.3%, other components are constant.

The chemical composition of product and physical properties in embodiment b:

Embodiment c

According to embodiment a same processes, by 53% high carbon ferro-chrome and low carbon ferrochromium 450kg, impel chromium content in iron liquid to reach 23.9%, carbon content to 3.5%, other components are constant.

The chemical composition of product and physical properties in embodiment c:

Claims (1)

1. the high chromium nickel of shallow-tank separator slideway molybdenum wear resistant alloy foundry goods preparation method, is characterized in that:

Calculate according to mass percent, this foundry goods composition part and content are: chromium 18-25%, and nickel 2-3%, molybdenum 1.5-2%, carbon 2.5-3.3%, copper 1.5-2%, manganese 1-1.5%, all the other are iron, its preparation method comprises the following steps:

(1) prepare furnace charge: take the furnace charge of its mass percent according to component and content, as radix proportioning, using soft steel as base-material, add the compositions such as copper, molybdenum-iron, nickel plate, high carbon ferro-chrome, low carbon ferrochromium and ferromanganese according to proportioning according to 1 ton of furnace charge;

(2) medium-frequency induction furnace fusing: the raw material of first step proportioning is inserted to melting in medium-frequency induction furnace, and its process neutral and alkali stove uses unslaked lime fouling slag making, covers melting liquid surface, heating and temperature control, between 1550-1600 DEG C, arrives high value for good;

(3) come out of the stove: melting liquid reaches 1600 DEG C just can come out of the stove below in deoxidation, before coming out of the stove, does matter inspection, modified abundant deoxidation can, at the suitable alterant of Bao Neijia, be carried out qualitative change processing before coming out of the stove;

(4) cast moulding: skim after coming out of the stove, the agent of agglomeration slag, treats that iron liquid leaves standstill five minutes in bag, is poured into the molding flask preparing, and naturally cooling, then heat-treats, and is the high chromium nickel of finished product shallow-tank separator slideway molybdenum wear resistant alloy foundry goods.