CN103882337A

CN103882337A - Wear-resistant alloy material for hydraulic valve and preparation method thereof

Info

Publication number: CN103882337A
Application number: CN201410054465.5A
Authority: CN
Inventors: 黄浩
Original assignee: Wuhu Hongkun Auto Parts Co Ltd
Current assignee: Wuhu Hongkun Auto Parts Co Ltd
Priority date: 2014-02-18
Filing date: 2014-02-18
Publication date: 2014-06-25

Abstract

The invention provides a wear-resistant alloy material for a hydraulic valve. The wear-resistant alloy material contains the following chemical elements by mass percent: 0.1-0.3% of carbon, 0.6-0.9% of silicon, 3.6-3.9% of manganese, 0.4-0.8% of chromium, 2.3-2.5% of nickel, 0.02-0.05% of molybdenum, 0.4-0.6% of B, 0.3-0.5% of Ti, not more than 0.030% of P, not more than 0.030% of S and the balance of iron. The porosity is reduced by 1-2 degrees by adding a refining agent. The wear-resistant alloy material has the beneficial effects that by combining the raw materials such as boron, nickel and the like and reasonably setting the proportion and the production process as well as the putting in order, the formed alloy material has the characteristics of relatively high strength and hardness, wear resistance and corrosion resistance, can obviously prolong the lives of wear-resistant parts and is suitable for casting or coating of the hydraulic valve; by using part of scrap iron as the raw material, the quality of the alloy is stable and uniform; as the refining agent is used for casting production, the porosity is reduced by 1-2 degrees.

Description

A kind of wear resistant alloy material for hydraulicvalve and preparation method thereof

Technical field

The present invention relates to metallic substance preparation field, relate in particular to a kind of wear resistant alloy material for hydraulicvalve and preparation method thereof.

Background technology

The development of steel alloy has had the history of more than 100 year, up to the present, diversified steel alloy is employed industrial, mainly contain with Types Below: quenched and tempered steel, spring steel, tool steel, rapid steel, die steel, high, normal, basic carbon alloy steel etc., so far, although steel alloy technology is greatly developed, but, still have a lot of problems to exist, as fastness to rubbing, hardness, rustless property, corrosion resistance nature, high and low temperature resistance, fragility, toughness, costs etc. can not be taken into account, can't meet the requirement of production in a lot of occasions, also require further improvement, to enhance productivity, reduce costs, improve security, for high-quality precision and sophisticated technology development provides safeguard, for social development provides power, task is also very arduous.

Summary of the invention

The object of the present invention is to provide a kind of wear resistant alloy material for hydraulicvalve and preparation method thereof, this alloy material has high wear resistance, hardness, resistant to elevated temperatures feature.

Technical scheme of the present invention is as follows:

For a wear resistant alloy material for hydraulicvalve, it is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.1-0.3, silicon 0.6-0.9, manganese 3.6-3.9, chromium 0.4-0.8, nickel 2.3-2.5, molybdenum 0.02-0.05, B0.4-0.6, Ti0.3-0.5, P≤0.030, S≤0.030, surplus are iron.

The production method of the described wear resistant alloy material for hydraulicvalve, is characterized in that:

(1), the pig iron and scrap iron are dropped in stove and melt and originate as ferrous substrate in 3:1 ratio; Carry out desulfurization, deoxidation, alloying, the refining of employing refining agent, casting, casting postheat treatment etc.;

(2) in alloying process, to the lot sequence that drops into alloying element in stove be: (1) silicon, chromium, nickel; (2) manganese, molybdenum; (3) other remaining component; The each batch of timed interval of dropping into element is 8-10 minute, after feeding intake, stirs.

Described casting postheat treatment is: be first warming up to 930-950 DEG C by room temperature with 180-200 DEG C/h of speed, insulation 3-4 hour; Be cooled to 640-660 DEG C with 120-140 DEG C/h of speed again, insulation 50-70 minute; Be cooled to 320-340 DEG C with 100-120 DEG C/h of speed again, insulation 2-3 hour; Be warming up to 520-540 DEG C with 150-170 DEG C/h of speed again, insulation 2-3 hour, takes out air cooling and get final product.

Described refining agent is made up of the raw material of following weight part: instrument comminuted steel shot 3-4, clay 10-12, Wingdale 3-4, sepiolite 2-3, Sodium Silicofluoride 2-3, SODIUMNITRATE 1-2, vermiculite 5-6, silicon carbide 9-11, titanium dioxide 2-3, fluorite 6-8, aluminium hydroxide 8-10, jade powder 3-4, montmorillonite 1-2; Preparation method mixes each raw material, is heated to molten state and stirs remove slag, and then, is poured into Quench in pure water, then is ground into 100-200 order powder; Gained powder is added and is equivalent to the silane resin acceptor kh-550 of powder weight 2-3%, the nano-carbon powder of 1-2%, after mixing, under 8-15Mpa, be pressed into base, then, at 900-950 DEG C, calcine 3-4 hour, cooling after, be ground into again 150-250 order powder, obtain final product.

Beneficial effect of the present invention

The present invention is by using the material combination such as boron, nickel, proportioning and production technique are rationally set, input order is rationally set, the alloy material of formation has higher intensity and hardness, wear resistance, corrosion resistant feature, can the significant prolongation wear resisting part life-span, be applicable to casting or the coating of hydraulicvalve; And use part scrap iron as raw material, make the steady quality homogeneous of alloy.Refining agent of the present invention is for Foundry Production, and the degree of porosity obviously improving in yield rate, particularly foundry goods reduces 1-2 degree, is controlled effectively, and can not produce pore at cast(ing) surface, and trapped oxide also obviously reduces, and oxide inclusion is 2 grades of left and right.

Embodiment

For a wear resistant alloy material for hydraulicvalve, chemical element composition and mass percent thereof that it contains are: carbon 0.1-0.3, silicon 0.6-0.9, manganese 3.6-3.9, chromium 0.4-0.8, nickel 2.3-2.5, molybdenum 0.02-0.05, B0.4-0.6, Ti0.3-0.5, P≤0.030, S≤0.030, surplus are iron.

The production method of the described wear resistant alloy material for hydraulicvalve is:

(2) in alloying process, to the lot sequence that drops into alloying element in stove be: (1) silicon, chromium, nickel; (2) manganese, molybdenum; (3) other remaining component; The each batch of timed interval of dropping into element is 9 minutes, after feeding intake, stirs.

Described casting postheat treatment is: be first warming up to 940 DEG C by room temperature with 190 DEG C/h of speed, be incubated 3.5 hours; Be cooled to 650 DEG C with 130 DEG C/h of speed again, be incubated 60 minutes; Be cooled to 330 DEG C with 110 DEG C/h of speed again, be incubated 2.5 hours; Be warming up to 530 DEG C with 160 DEG C/h of speed again, be incubated 2.5 hours, take out air cooling and get final product.

Described refining agent by following weight part (kilogram) raw material make: instrument comminuted steel shot 4, clay 10, Wingdale 3, sepiolite 2, Sodium Silicofluoride 2, SODIUMNITRATE 2, vermiculite 5, silicon carbide 9, titanium dioxide 2, fluorite 8, aluminium hydroxide 8, jade powder 3, montmorillonite 2; Preparation method mixes each raw material, is heated to molten state and stirs remove slag, and then, is poured into Quench in pure water, then is ground into 100-200 order powder; Gained powder is added and is equivalent to the silane resin acceptor kh-550 of powder weight 2%, 1% nano-carbon powder, after mixing, under 12-15Mpa, be pressed into base, then, at 900-950 DEG C, calcine 3-4 hour, cooling after, be ground into again 150-250 order powder, obtain final product.

The present invention for the mechanical property of the wear resistant alloy material of hydraulicvalve is: tensile strength 1180MPa, yield strength 865MPa, unit elongation 14%, relative reduction in area 26%, impact absorbing energy 56J, impelling strength 63J/cm2, hardness 255HB.

Claims

1. for a wear resistant alloy material for hydraulicvalve, it is characterized in that: chemical element composition and mass percent thereof that it contains are: carbon 0.1-0.3, silicon 0.6-0.9, manganese 3.6-3.9, chromium 0.4-0.8, nickel 2.3-2.5, molybdenum 0.02-0.05, B0.4-0.6, Ti0.3-0.5, P≤0.030, S≤0.030, surplus are iron.

2. the production method of the wear resistant alloy material for hydraulicvalve according to claim 1, is characterized in that:

3. the production method of the wear resistant alloy material for hydraulicvalve according to claim 2, is characterized in that: described casting postheat treatment is: be first warming up to 930-950 DEG C by room temperature with 180-200 DEG C/h of speed, insulation 3-4 hour; Be cooled to 640-660 DEG C with 120-140 DEG C/h of speed again, insulation 50-70 minute; Be cooled to 320-340 DEG C with 100-120 DEG C/h of speed again, insulation 2-3 hour; Be warming up to 520-540 DEG C with 150-170 DEG C/h of speed again, insulation 2-3 hour, takes out air cooling and get final product.

4. the production method of the wear resistant alloy material for hydraulicvalve according to claim 2, is characterized in that: described refining agent is made up of the raw material of following weight part: instrument comminuted steel shot 3-4, clay 10-12, Wingdale 3-4, sepiolite 2-3, Sodium Silicofluoride 2-3, SODIUMNITRATE 1-2, vermiculite 5-6, silicon carbide 9-11, titanium dioxide 2-3, fluorite 6-8, aluminium hydroxide 8-10, jade powder 3-4, montmorillonite 1-2; Preparation method mixes each raw material, is heated to molten state and stirs remove slag, and then, is poured into Quench in pure water, then is ground into 100-200 order powder; Gained powder is added and is equivalent to the silane resin acceptor kh-550 of powder weight 2-3%, the nano-carbon powder of 1-2%, after mixing, under 8-15Mpa, be pressed into base, then, at 900-950 DEG C, calcine 3-4 hour, cooling after, be ground into again 150-250 order powder, obtain final product.