CN105401057A - Tough high-chrome abrasion-resistant cast ball and preparation method thereof - Google Patents
Tough high-chrome abrasion-resistant cast ball and preparation method thereof Download PDFInfo
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- CN105401057A CN105401057A CN201510757694.8A CN201510757694A CN105401057A CN 105401057 A CN105401057 A CN 105401057A CN 201510757694 A CN201510757694 A CN 201510757694A CN 105401057 A CN105401057 A CN 105401057A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D5/00—Heat treatments of cast-iron
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/36—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for balls; for rollers
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
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- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
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- Crystallography & Structural Chemistry (AREA)
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Abstract
The invention discloses a tough high-chrome abrasion-resistant cast ball. The tough high-chrome abrasion-resistant cast ball comprises, by weight, 2%-2.2% of C, 10%-12% of Cr, 0.4%-0.6% of Si, 0.5%-0.7% of Mn, 0.5%-2% of Nd, 1%-2.5% of Si, 0.5%-2% of Ti and the balance Fe and inevitable impurities. The invention further discloses a preparation method of the tough high-chrome abrasion-resistant cast ball. The preparation method of the tough high-chrome abrasion-resistant cast ball comprises the steps of smelting, casting and heat treatment. According to the tough high-chrome abrasion-resistant cast ball and the preparation method thereof, a micro amount of Nd, a micro amount of Si and a micro amount of Ti are added based on a conventional high-chrome cast ball, so that on the basis that the high hardness and high abrasion resistance of the high-chrome cast ball are guaranteed, the lower quenching tendency and the lower cracking tendency are achieved in the use process, the preparation technique is simple, and the cost is low.
Description
Technical field
The present invention relates to wear-resistant metal material technical field, particularly relate to a kind of toughening type high-chromium wear-resistant cast ball and preparation method thereof.
Background technology
Ball mill, as the major equipment of material grinding in mine, Cement industry, obtains popularization and application widely, and grinding element is wherein the important expendable material of ball mill operation work, and the quality of its performance is directly connected to output and the running efficiency of ball mill.
Rich chromium cast iron is a kind of excellent property and is subject to the special wear-resistant material paid attention to.There is the wear resistance that steel alloy of comparing is higher, the toughness higher than ordinary white cast iron and intensity, also have good high temperature resistant and corrosion resistance nature simultaneously concurrently.Rich chromium cast iron technique is simple, moderate cost, is one of current domestic and international the most widely used high-abrasive material.A large amount of failure analyses of high chromium casting ball are shown, cast ball main failure forms is in use by fatigue and corrodes the crack of surface layer of acting in conjunction generation or come off, and its root tiny crack of being formed in quenching process of cast ball often, especially large size high chromium casting ball produces cracking in quenching and follow-up use procedure is its main failure forms.In order to ensure its low tearing tendency, often need higher tempering temperature, the consequent is the reduction of hardness and wear resisting property.
Therefore, large size high-chromium wear-resistant cast ball is needed to improve its toughness further on the basis ensureing its strong hardness and wear resistance, reduces the tearing tendency of cast ball in quenching process, improve its use properties further.
Summary of the invention
Based on the technical problem that background technology exists, the present invention proposes a kind of toughening type high-chromium wear-resistant cast ball and preparation method thereof, added by the compound of trace alloying element, in guarantee high rigidity, on the basis of high-wearing feature, there is lower quenching and the tearing tendency of use procedure, preparation technology is simple, cost is lower, present invention process strong adaptability simultaneously, do not change original melting, casting and thermal treatment process, realize the good combination improving wear resistance and reduce tearing tendency, and the tempering temperature of cast ball can be reduced under the prerequisite not increasing tearing tendency, be applied to cement, the field large-size ball mill tools such as electric power can obtain good effect and economic benefit.
A kind of toughening type high-chromium wear-resistant cast ball that the present invention proposes, its compositions in weight percentage comprises: C:2 ~ 2.2wt%, Cr:10 ~ 12wt%, Si:0.4 ~ 0.6wt%, Mn:0.5 ~ 0.7wt%, Nd:0.5 ~ 2wt%, Si:1 ~ 2.5wt%, Ti:0.5 ~ 2wt%, all the other are Fe and inevitable impurity.
Preferably, the weight ratio of Nd and Cr is 1 ~ 1.5:10 ~ 12.
Preferably, the weight ratio of Si and Cr is 1 ~ 2:10 ~ 12.
Preferably, the weight ratio of Ti and Cr is 0.8 ~ 1.5:10 ~ 12.
Preferably, its compositions in weight percentage comprises: C:2.15wt%, Cr:11wt%, Si:0.5wt%, Mn:0.6wt%, Nd:1wt%, Si:1wt%, Ti:1%, and all the other are Fe and inevitable impurity.
The preparation method of the above-mentioned toughening type high-chromium wear-resistant cast ball that the present invention also proposes, comprising: melting, casting, thermal treatment.
Preferably, the concrete operations of melting are: raw material melting in medium-frequency induction furnace is evenly obtained aluminium alloy, and smelting temperature is 1550 ~ 1600 DEG C.
Preferably, the concrete operations of casting are: aluminium alloy melting obtained sends into constant temperature casting in mould, and pouring temperature is 1400 ~ 1450 DEG C, and cooling, the demoulding obtains cast ball ball base.
Preferably, thermal treatment comprises Quench and temper; The concrete operations of quenching are: be heated to 920 ~ 980 DEG C by casting the cast ball ball base obtained, insulation 2 ~ 4h, sends in quenchant and cool, and takes out cleaning and obtains quenching ball base.
Preferably, the concrete operations of tempering are: the quenching ball base obtained quenching is sent in stove and carried out tempering, and tempering temperature is 200 ~ 350 DEG C, and insulation 4 ~ 8h, cool to 90 ~ 110 DEG C with the furnace, come out of the stove, slow cooling to room temperature obtains toughening type high-chromium wear-resistant cast ball.
The present invention, on the basis of conventional high chromium casting ball, adds micro-Nd, Si and Ti composition, significantly improves wear resisting property, reduce tearing tendency.Wherein Nd can crystal grain thinning, purification crystal boundary, reduce high chromium casting ball produce and use procedure in tearing tendency; Si can improve the hardening capacity of cast ball, and forms local graphite on carbide border, reduces tearing tendency further; Add the TiC that metal Ti forms small and dispersed in heat treatment process, thus improve the wear resistance of cast ball.The present invention is added by the compound of trace alloying element, on the basis ensureing high rigidity, high-wearing feature, has lower quenching and the tearing tendency of use procedure, and preparation technology is simple, and cost is lower.
Compared with prior art, beneficial effect of the present invention is embodied in:
1, Nd and Si is added by a small amount of, the tearing tendency of high chromium casting ball can be effectively reduced, especially the tearing tendency of large size high chromium casting ball in quenching and use procedure, thus can reduce tempering temperature in drawing process, keeps higher hardness and does not increase its tearing tendency;
2, add Ti on a small quantity, form the TiC of high rigidity, high diffusive distribution, improve cast ball wear resistance;
3, Technological adaptability is strong, without the need to changing original melting, casting and thermal treatment process and equipment.
Accompanying drawing explanation
Fig. 1 is the as cast condition metallograph of the toughening type high-chromium wear-resistant cast ball of the embodiment of the present invention 5.
Fig. 3 is the as cast condition metallograph of the conventional high chromium casting ball not adding Nd, Si, Ti.
Fig. 2 is the heat treatment state metallograph of the toughening type high-chromium wear-resistant cast ball of the embodiment of the present invention 5.
Fig. 4 is the heat treatment state metallograph of the conventional high chromium casting ball not adding Nd, Si, Ti.
Embodiment
Below, by specific embodiment, technical scheme of the present invention is described in detail.
Embodiment 1
A kind of toughening type high-chromium wear-resistant cast ball that the present invention proposes, its compositions in weight percentage comprises: C:2wt%, Cr:12wt%, Si:0.4wt%, Mn:0.7wt%, Nd:0.5wt%, Si:2.5wt%, Ti:0.5wt%, all the other are Fe and inevitable impurity.
The preparation method of the above-mentioned toughening type high-chromium wear-resistant cast ball that the present invention also proposes, comprising: raw material melting in medium-frequency induction furnace is evenly obtained aluminium alloy, smelting temperature is 1600 DEG C; Aluminium alloy melting obtained sends into constant temperature casting in mould, and pouring temperature is 1400 DEG C, cooling, and the demoulding obtains cast ball ball base; Be heated to 980 DEG C by casting the cast ball ball base obtained, insulation 2h, sends in quenchant and cools, and takes out cleaning and obtains quenching ball base; The quenching ball base obtained quenching is sent in stove and is carried out tempering, and tempering temperature is 350 DEG C, and insulation 4h, cool to 110 DEG C with the furnace, come out of the stove, slow cooling to room temperature obtains toughening type high-chromium wear-resistant cast ball.
Embodiment 2
A kind of toughening type high-chromium wear-resistant cast ball that the present invention proposes, its compositions in weight percentage comprises: C:2.2wt%, Cr:10wt%, Si:0.6wt%, Mn:0.5wt%, Nd:2wt%, Si:1wt%, Ti:2wt%, all the other are Fe and inevitable impurity.
The preparation method of the above-mentioned toughening type high-chromium wear-resistant cast ball that the present invention also proposes, comprising: raw material melting in medium-frequency induction furnace is evenly obtained aluminium alloy, smelting temperature is 1550 DEG C; Aluminium alloy melting obtained sends into constant temperature casting in mould, and pouring temperature is 1450 DEG C, cooling, and the demoulding obtains cast ball ball base; Be heated to 920 DEG C by casting the cast ball ball base obtained, insulation 4h, sends in quenchant and cools, and takes out cleaning and obtains quenching ball base; The quenching ball base obtained quenching is sent in stove and is carried out tempering, and tempering temperature is 200 DEG C, and insulation 8h, cool to 90 DEG C with the furnace, come out of the stove, slow cooling to room temperature obtains toughening type high-chromium wear-resistant cast ball.
Embodiment 3
A kind of toughening type high-chromium wear-resistant cast ball that the present invention proposes, its compositions in weight percentage comprises: C:2.05wt%, Cr:11.5wt%, Si:0.45wt%, Mn:0.65wt%, Nd:1wt%, Si:2wt%, Ti:0.8wt%, all the other are Fe and inevitable impurity.
The preparation method of the above-mentioned toughening type high-chromium wear-resistant cast ball that the present invention also proposes, comprising: raw material melting in medium-frequency induction furnace is evenly obtained aluminium alloy, smelting temperature is 1580 DEG C; Aluminium alloy melting obtained sends into constant temperature casting in mould, and pouring temperature is 1420 DEG C, cooling, and the demoulding obtains cast ball ball base; Be heated to 960 DEG C by casting the cast ball ball base obtained, insulation 2.5h, sends in quenchant and cools, and takes out cleaning and obtains quenching ball base; The quenching ball base obtained quenching is sent in stove and is carried out tempering, and tempering temperature is 300 DEG C, and insulation 5h, cool to 105 DEG C with the furnace, come out of the stove, slow cooling to room temperature obtains toughening type high-chromium wear-resistant cast ball.
Embodiment 4
A kind of toughening type high-chromium wear-resistant cast ball that the present invention proposes, its compositions in weight percentage comprises: C:2.1wt%, Cr:10.5wt%, Si:0.55wt%, Mn:0.55wt%, Nd:1.5wt%, Si:1wt%, Ti:1.5wt%, all the other are Fe and inevitable impurity.
The preparation method of the above-mentioned toughening type high-chromium wear-resistant cast ball that the present invention also proposes, comprising: raw material melting in medium-frequency induction furnace is evenly obtained aluminium alloy, smelting temperature is 1560 DEG C; Aluminium alloy melting obtained sends into constant temperature casting in mould, and pouring temperature is 1440 DEG C, cooling, and the demoulding obtains cast ball ball base; Be heated to 940 DEG C by casting the cast ball ball base obtained, insulation 3.5h, sends in quenchant and cools, and takes out cleaning and obtains quenching ball base; The quenching ball base obtained quenching is sent in stove and is carried out tempering, and tempering temperature is 250 DEG C, and insulation 7h, cool to 95 DEG C with the furnace, come out of the stove, slow cooling to room temperature obtains toughening type high-chromium wear-resistant cast ball.
Embodiment 5
A kind of toughening type high-chromium wear-resistant cast ball that the present invention proposes, its compositions in weight percentage comprises: C:2.15wt%, Cr:11wt%, Si:0.5wt%, Mn:0.6wt%, Nd:1wt%, Si:1wt%, Ti:1%, and all the other are Fe and inevitable impurity.
The preparation method of the above-mentioned toughening type high-chromium wear-resistant cast ball that the present invention also proposes, comprising: raw material melting in medium-frequency induction furnace is evenly obtained aluminium alloy, smelting temperature is 1550 DEG C; Aluminium alloy melting obtained sends into constant temperature casting in mould, and pouring temperature is 1450 DEG C, cooling, and the demoulding obtains cast ball ball base; Be heated to 950 DEG C by casting the cast ball ball base obtained, insulation 2h, sends in quenchant and cools, and takes out cleaning and obtains quenching ball base; The quenching ball base obtained quenching is sent in stove and is carried out tempering, and tempering temperature is 350 DEG C, and insulation 5h, cool to 100 DEG C with the furnace, come out of the stove, slow cooling to room temperature obtains toughening type high-chromium wear-resistant cast ball.
Embodiment 5 gained toughening type high-chromium wear-resistant cast ball and the conventional high chromium casting ball that do not add Nd, Si, Ti are carried out to microimaging obtain metallograph in as cast condition, heat treatment state, as shown in figures 1-4.Fig. 1 and Fig. 2 is compared, Fig. 3 and Fig. 4 is compared, can find out: relative to the conventional high chromium casting ball not adding Nd, Si, Ti, crystal grain of the present invention is more tiny, after heat treatment have obvious hard phase to separate out.
Embodiment 6
A kind of toughening type high-chromium wear-resistant cast ball that the present invention proposes, its compositions in weight percentage comprises: C:2.15wt%, Cr:11wt%, Si:0.5wt%, Mn:0.6wt%, Nd:1wt%, Si:1wt%, Ti:1%, and all the other are Fe and inevitable impurity.
The preparation method of the above-mentioned toughening type high-chromium wear-resistant cast ball that the present invention also proposes, comprising: raw material melting in medium-frequency induction furnace is evenly obtained aluminium alloy, smelting temperature is 1550 DEG C; Aluminium alloy melting obtained sends into constant temperature casting in mould, and pouring temperature is 1450 DEG C, cooling, and the demoulding obtains cast ball ball base; Be heated to 950 DEG C by casting the cast ball ball base obtained, insulation 2h, sends in quenchant and cools, and takes out cleaning and obtains quenching ball base; The quenching ball base obtained quenching is sent in stove and is carried out tempering, and tempering temperature is 300 DEG C, and insulation 5h, cool to 100 DEG C with the furnace, come out of the stove, slow cooling to room temperature obtains toughening type high-chromium wear-resistant cast ball.
Embodiment 7
A kind of toughening type high-chromium wear-resistant cast ball that the present invention proposes, its compositions in weight percentage comprises: C:2.15wt%, Cr:11wt%, Si:0.5wt%, Mn:0.6wt%, Nd:1wt%, Si:1wt%, Ti:1%, and all the other are Fe and inevitable impurity.
The preparation method of the above-mentioned toughening type high-chromium wear-resistant cast ball that the present invention also proposes, comprising: raw material melting in medium-frequency induction furnace is evenly obtained aluminium alloy, smelting temperature is 1550 DEG C; Aluminium alloy melting obtained sends into constant temperature casting in mould, and pouring temperature is 1450 DEG C, cooling, and the demoulding obtains cast ball ball base; Be heated to 950 DEG C by casting the cast ball ball base obtained, insulation 2h, sends in quenchant and cools, and takes out cleaning and obtains quenching ball base; The quenching ball base obtained quenching is sent in stove and is carried out tempering, and tempering temperature is 250 DEG C, and insulation 5h, cool to 100 DEG C with the furnace, come out of the stove, slow cooling to room temperature obtains toughening type high-chromium wear-resistant cast ball.
Embodiment 8
A kind of toughening type high-chromium wear-resistant cast ball that the present invention proposes, its compositions in weight percentage comprises: C:2.15wt%, Cr:11wt%, Si:0.5wt%, Mn:0.6wt%, Nd:1wt%, Si:1wt%, Ti:1%, and all the other are Fe and inevitable impurity.
The preparation method of the above-mentioned toughening type high-chromium wear-resistant cast ball that the present invention also proposes, comprising: raw material melting in medium-frequency induction furnace is evenly obtained aluminium alloy, smelting temperature is 1550 DEG C; Aluminium alloy melting obtained sends into constant temperature casting in mould, and pouring temperature is 1450 DEG C, cooling, and the demoulding obtains cast ball ball base; Be heated to 950 DEG C by casting the cast ball ball base obtained, insulation 2h, sends in quenchant and cools, and takes out cleaning and obtains quenching ball base; The quenching ball base obtained quenching is sent in stove and is carried out tempering, and tempering temperature is 200 DEG C, and insulation 5h, cool to 100 DEG C with the furnace, come out of the stove, slow cooling to room temperature obtains toughening type high-chromium wear-resistant cast ball.
Embodiment 5 ~ 8 gained toughening type high-chromium wear-resistant cast ball and the conventional high chromium casting ball not adding Nd, Si, Ti are carried out as cast condition, heat treatment state hardness test, and its test result is as follows:
| Sample | Toughening type high-chromium wear-resistant cast ball (HRC) | Conventional high chromium casting ball (HRC) |
| As cast condition | 49 | 40.5 |
| Quenching state | 70 | 67 |
| Tempering 350 DEG C (i.e. embodiment 5) | 61.2 | 59 |
| Tempering 300 DEG C (i.e. embodiment 6) | 63.5 | 61 |
| Tempering 250 DEG C (i.e. embodiment 7) | 65.5 | 62 |
| Tempering 200 DEG C (i.e. embodiment 8) | 66.2 | 63.5 |
Embodiment 9
A kind of toughening type high-chromium wear-resistant cast ball that the present invention proposes, its compositions in weight percentage comprises: C:2.15wt%, Cr:11wt%, Si:0.5wt%, Mn:0.6wt%, Nd:1wt%, and all the other are Fe and inevitable impurity.
The preparation method of the above-mentioned toughening type high-chromium wear-resistant cast ball that the present invention also proposes, comprising: raw material melting in medium-frequency induction furnace is evenly obtained aluminium alloy, smelting temperature is 1550 DEG C; Aluminium alloy melting obtained sends into constant temperature casting in mould, and pouring temperature is 1450 DEG C, cooling, and the demoulding obtains cast ball ball base; Be heated to 950 DEG C by casting the cast ball ball base obtained, insulation 2h, sends in quenchant and cools, and takes out cleaning and obtains quenching ball base; The quenching ball base obtained quenching is sent in stove and is carried out tempering, and tempering temperature is 350 DEG C, and insulation 5h, cool to 100 DEG C with the furnace, come out of the stove, slow cooling to room temperature obtains toughening type high-chromium wear-resistant cast ball.
Embodiment 10
A kind of toughening type high-chromium wear-resistant cast ball that the present invention proposes, its compositions in weight percentage comprises: C:2.15wt%, Cr:11wt%, Si:0.5wt%, Mn:0.6wt%, Nd:1wt%, and all the other are Fe and inevitable impurity.
The preparation method of the above-mentioned toughening type high-chromium wear-resistant cast ball that the present invention also proposes, comprising: raw material melting in medium-frequency induction furnace is evenly obtained aluminium alloy, smelting temperature is 1550 DEG C; Aluminium alloy melting obtained sends into constant temperature casting in mould, and pouring temperature is 1450 DEG C, cooling, and the demoulding obtains cast ball ball base; Be heated to 950 DEG C by casting the cast ball ball base obtained, insulation 2h, sends in quenchant and cools, and takes out cleaning and obtains quenching ball base; The quenching ball base obtained quenching is sent in stove and is carried out tempering, and tempering temperature is 300 DEG C, and insulation 5h, cool to 100 DEG C with the furnace, come out of the stove, slow cooling to room temperature obtains toughening type high-chromium wear-resistant cast ball.
Embodiment 11
A kind of toughening type high-chromium wear-resistant cast ball that the present invention proposes, its compositions in weight percentage comprises: C:2.15wt%, Cr:11wt%, Si:0.5wt%, Mn:0.6wt%, Nd:1wt%, and all the other are Fe and inevitable impurity.
The preparation method of the above-mentioned toughening type high-chromium wear-resistant cast ball that the present invention also proposes, comprising: raw material melting in medium-frequency induction furnace is evenly obtained aluminium alloy, smelting temperature is 1550 DEG C; Aluminium alloy melting obtained sends into constant temperature casting in mould, and pouring temperature is 1450 DEG C, cooling, and the demoulding obtains cast ball ball base; Be heated to 950 DEG C by casting the cast ball ball base obtained, insulation 2h, sends in quenchant and cools, and takes out cleaning and obtains quenching ball base; The quenching ball base obtained quenching is sent in stove and is carried out tempering, and tempering temperature is 250 DEG C, and insulation 5h, cool to 100 DEG C with the furnace, come out of the stove, slow cooling to room temperature obtains toughening type high-chromium wear-resistant cast ball.
Embodiment 12
A kind of toughening type high-chromium wear-resistant cast ball that the present invention proposes, its compositions in weight percentage comprises: C:2.15wt%, Cr:11wt%, Si:0.5wt%, Mn:0.6wt%, Nd:1wt%, and all the other are Fe and inevitable impurity.
The preparation method of the above-mentioned toughening type high-chromium wear-resistant cast ball that the present invention also proposes, comprising: raw material melting in medium-frequency induction furnace is evenly obtained aluminium alloy, smelting temperature is 1550 DEG C; Aluminium alloy melting obtained sends into constant temperature casting in mould, and pouring temperature is 1450 DEG C, cooling, and the demoulding obtains cast ball ball base; Be heated to 950 DEG C by casting the cast ball ball base obtained, insulation 2h, sends in quenchant and cools, and takes out cleaning and obtains quenching ball base; The quenching ball base obtained quenching is sent in stove and is carried out tempering, and tempering temperature is 200 DEG C, and insulation 5h, cool to 100 DEG C with the furnace, come out of the stove, slow cooling to room temperature obtains toughening type high-chromium wear-resistant cast ball.
Embodiment 9 ~ 12 gained toughening type high-chromium wear-resistant cast ball and the conventional high chromium casting ball not adding Nd, Si, Ti are carried out as cast condition, heat treatment state hardness test, and its test result is as follows:
| Sample | Toughening type high-chromium wear-resistant cast ball (HRC) | Conventional high chromium casting ball (HRC) |
| As cast condition | 48.7 | 40.5 |
| Quenching state | 66.7 | 67 |
| Tempering 350 DEG C (i.e. embodiment 9) | 57.7 | 59 |
| Tempering 300 DEG C (i.e. embodiment 10) | 60 | 61 |
| Tempering 250 DEG C (i.e. embodiment 11) | 61 | 62 |
| Tempering 200 DEG C (i.e. embodiment 12) | 62.8 | 63.5 |
The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (10)
1. a toughening type high-chromium wear-resistant cast ball, it is characterized in that, its compositions in weight percentage comprises: C:2 ~ 2.2wt%, Cr:10 ~ 12wt%, Si:0.4 ~ 0.6wt%, Mn:0.5 ~ 0.7wt%, Nd:0.5 ~ 2wt%, Si:1 ~ 2.5wt%, Ti:0.5 ~ 2wt%, all the other are Fe and inevitable impurity.
2. toughening type high-chromium wear-resistant cast ball according to claim 1, it is characterized in that, the weight ratio of Nd and Cr is 1 ~ 1.5:10 ~ 12.
3. toughening type high-chromium wear-resistant cast ball according to claim 1 or 2, is characterized in that, the weight ratio of Si and Cr is 1 ~ 2:10 ~ 12.
4. toughening type high-chromium wear-resistant cast ball according to any one of claim 1-3, is characterized in that, the weight ratio of Ti and Cr is 0.8 ~ 1.5:10 ~ 12.
5. toughening type high-chromium wear-resistant cast ball according to any one of claim 1-4, it is characterized in that, its compositions in weight percentage comprises: C:2.15wt%, Cr:11wt%, Si:0.5wt%, Mn:0.6wt%, Nd:1wt%, Si:1wt%, Ti:1%, all the other are Fe and inevitable impurity.
6. the preparation method of toughening type high-chromium wear-resistant cast ball as described in any one of claim 1-5, is characterized in that, comprising: melting, casting, thermal treatment.
7. the preparation method of toughening type high-chromium wear-resistant cast ball according to claim 6, it is characterized in that, the concrete operations of melting are: raw material melting in medium-frequency induction furnace is evenly obtained aluminium alloy, and smelting temperature is 1550 ~ 1600 DEG C.
8. the preparation method of toughening type high-chromium wear-resistant cast ball according to claim 6 or 7, it is characterized in that, the concrete operations of casting are: aluminium alloy melting obtained sends into constant temperature casting in mould, and pouring temperature is 1400 ~ 1450 DEG C, cooling, the demoulding obtains cast ball ball base.
9. the preparation method of toughening type high-chromium wear-resistant cast ball according to any one of claim 6-8, it is characterized in that, thermal treatment comprises Quench and temper; The concrete operations of quenching are: be heated to 920 ~ 980 DEG C by casting the cast ball ball base obtained, insulation 2 ~ 4h, sends in quenchant and cool, and takes out cleaning and obtains quenching ball base.
10. the preparation method of toughening type high-chromium wear-resistant cast ball according to claim 9, it is characterized in that, the concrete operations of tempering are: the quenching ball base obtained quenching is sent in stove and carried out tempering, tempering temperature is 200 ~ 350 DEG C, insulation 4 ~ 8h, cool to 90 ~ 110 DEG C with the furnace, come out of the stove, slow cooling to room temperature obtains toughening type high-chromium wear-resistant cast ball.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111733365A (en) * | 2020-07-03 | 2020-10-02 | 合肥工业大学 | Production method of high-hardness high-toughness wear-resistant forged ball |
| CN113897537A (en) * | 2021-08-24 | 2022-01-07 | 安徽新马铸造科技有限公司 | Wear-resistant steel ball with long service life and casting process thereof |
| CN113897541A (en) * | 2021-08-24 | 2022-01-07 | 安徽新马铸造科技有限公司 | High-chromium wear-resistant steel ball and casting process thereof |
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| CN103981424A (en) * | 2014-05-07 | 2014-08-13 | 中建材宁国新马耐磨材料有限公司 | High-chromium alloy cast ball and preparation method thereof |
| CN104831157A (en) * | 2015-05-22 | 2015-08-12 | 安徽省宁国市宁沪钢球有限公司 | Abrasion-resistant high-chromium cast ball and preparation process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111733365A (en) * | 2020-07-03 | 2020-10-02 | 合肥工业大学 | Production method of high-hardness high-toughness wear-resistant forged ball |
| CN111733365B (en) * | 2020-07-03 | 2021-05-14 | 合肥工业大学 | Production method of high-hardness high-toughness wear-resistant forged ball |
| CN113897537A (en) * | 2021-08-24 | 2022-01-07 | 安徽新马铸造科技有限公司 | Wear-resistant steel ball with long service life and casting process thereof |
| CN113897541A (en) * | 2021-08-24 | 2022-01-07 | 安徽新马铸造科技有限公司 | High-chromium wear-resistant steel ball and casting process thereof |
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