CN105200327A - Corrosion-resistant casting steel ball and heat treatment method thereof - Google Patents

Corrosion-resistant casting steel ball and heat treatment method thereof Download PDF

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Publication number
CN105200327A
CN105200327A CN201510634196.4A CN201510634196A CN105200327A CN 105200327 A CN105200327 A CN 105200327A CN 201510634196 A CN201510634196 A CN 201510634196A CN 105200327 A CN105200327 A CN 105200327A
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CN
China
Prior art keywords
steel ball
erosion resistant
corrosion
casting steel
resistant foundry
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Pending
Application number
CN201510634196.4A
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Chinese (zh)
Inventor
胡大为
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Hunan Dianli Wear Metal Products Co Ltd
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Hunan Dianli Wear Metal Products Co Ltd
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Application filed by Hunan Dianli Wear Metal Products Co Ltd filed Critical Hunan Dianli Wear Metal Products Co Ltd
Priority to CN201510634196.4A priority Critical patent/CN105200327A/en
Publication of CN105200327A publication Critical patent/CN105200327A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a corrosion-resistant casting steel ball and a heat treatment method thereof. The corrosion-resistant casting steel ball comprises the following components in percentage by mass: 0.1-0.15% of C, 14-17% of Cr, 0.2-0.4% of Si, 1-1.5% of Mn, 0.1-0.2% of Cu, smaller than or equal to 0.015% of P, 0.050-0.070% of Nb, 0.1-0.2% of Ti, 0.35-0.65% of Co, 0.3-0.5% of Mo, 0.1-0.15% of Sm, and the balanced Fe and unavoidable impurities. A casting steel structure is tempered sorbite, lamellar spacing is small, and the prepared corrosion-resistant casting steel ball has high corrosion resistance, high yield strength, good toughness and impact resistance and excellent wear resistance.

Description

A kind of erosion resistant foundry steel ball and heat treating method thereof
Technical field
The present invention relates to iron and steel technical field, particularly a kind of erosion resistant foundry steel ball and heat treating method thereof.
Background technology
During ball mill wet-milling ore pulp, because steel ball soaks in media as well, require that steel ball has certain corrosion resistance.And steel ball casting of the prior art, because the collocation of the alloying element such as its carbon manganese chromium is unreasonable, and mostly be austenite or martensite and block eutectic carbides due to its metallographic structure, be easily subject to the corrosion of ore pulp, cause ball to consume comparatively large, production cost is high.
Summary of the invention
In order to solve the technical problem existed in background technology, the present invention proposes a kind of erosion resistant foundry steel ball and heat treating method thereof, the steel ball sheet interlayer spacing that it obtains is tiny, and have strong corrosion resistance, yield strength is high, and toughness is good, and wear resisting property is excellent.
First aspect present invention provides a kind of erosion resistant foundry steel ball, and the mass percent of its component and component is respectively:
C:0.2 ~ 0.3%, Cr:14 ~ 17%, Si:0.2 ~ 0.4%, Mn:1 ~ 1.5%, Cu:0.1 ~ 0.2%, P :≤0.015%, Nb:0.050 ~ 0.070%, Ti:0.1 ~ 0.2%, Co:0.35 ~ 0.65%, Mo:0.3 ~ 0.5%, Sm:0.1 ~ 0.15%, surplus is Fe and inevitable impurity.
This steel ball casting be organized as tempered sorbite.
Second aspect present invention provides a kind of heat treating method of erosion resistant foundry steel ball, comprises the following steps:
By each composition Homogeneous phase mixing by mass percentage;
Adopt main frequency furnace fusion smelting;
Molten iron is cast in mould, the cooling forming demoulding;
Chilled steel ball is heated to 1000-1050 DEG C;
With hardening liquid quenching at 850 ~ 900 DEG C, the cool time is 2min;
Tempering at 550 ~ 600 DEG C, speed of cooling 10-12 DEG C/min;
To be cooled after 200 DEG C, put into insulated tank and progressively cool to room temperature.
Preferably, drawing process adopts air cooling.
Disclosing based on technique scheme, the steel ball casting obtained according to a kind of erosion resistant foundry steel ball provided by the invention and heat treating method thereof, its sheet interlayer spacing is tiny, and have strong corrosion resistance, yield strength is high, and toughness is good, and wear resisting property is excellent; In the medium of pH value 3-7, erosion rate is less than for 0.1%/year, and in the medium of pH value 7-11, erosion rate is less than for 0.08%/year.
Accompanying drawing explanation
Fig. 1 is the schema of the heat treating method of a kind of erosion resistant foundry steel ball that the present invention proposes;
Fig. 2 is the metallurgical structure schematic diagram of a kind of erosion resistant foundry steel ball that the present invention proposes.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail.
Please refer to Fig. 1, the heat treating method of a kind of erosion resistant foundry steel ball provided by the invention, comprises the steps:
By each composition Homogeneous phase mixing by mass percentage;
Adopt main frequency furnace fusion smelting;
Molten iron is cast in mould, the cooling forming demoulding;
Chilled steel ball is heated to 1000-1050 DEG C;
With hardening liquid quenching at 850 ~ 900 DEG C, the cool time is 2min;
Tempering at 550 ~ 600 DEG C, speed of cooling 10-12 DEG C/min;
To be cooled after 200 DEG C, put into insulated tank and progressively cool to room temperature.
Drawing process adopts air cooling.
The metallurgical structure schematic diagram of the steel ball casting obtained according to this heat treating method please refer to Fig. 2.
For the difference of each constituent mass per-cent, its steel ball casting obtained and performance also slightly different, specifically please refer to following examples.
Embodiment one
Each component and mass percent are respectively: C:0.1%, Cr:14%, Si:0.2%, Mn:1%, Cu:0.1%, P :≤0.015%, Nb:0.050%, Ti:0.1%, Co:0.35%, Mo:0.3%: Sm:0.1%, surplus is Fe and inevitable impurity.After heat-treating according to the method described above, obtain the steel ball with tempered sorbite tissue.
Test shows: steel ball surface hardness reaches 64HRC; Steel ball is in the medium of pH value 3-7, and erosion rate is 0.09%/year, and in the medium of pH value 7-11, erosion rate is 0.06%/year.
Embodiment 2
Each component and mass percent are respectively: C:0.13%, Cr:15%, Si:0.3%, Mn:1.2%, Cu:0.15%, P :≤0.015%, Nb:0.060%, Ti:0.15%, Co:0.5%, Mo:0.4%, Sm:0.12%, surplus is Fe and inevitable impurity.After heat-treating according to the method described above, obtain the steel ball with tempered sorbite tissue.
Test shows: steel ball surface hardness reaches 65HRC; Steel ball is in the medium of pH value 3-7, and erosion rate is 0.075%/year, and in the medium of pH value 7-11, erosion rate is 0.05%/year.
Embodiment 3
Each component and mass percent are respectively: C:0.15%, Cr:17%, Si:0.4%, Mn:1.5%, Cu:0.2%, P :≤0.015%, Nb:0.070%, Ti:0.2%, Co:0.65%, Mo:0.5%, Sm:0.15%, surplus is Fe and inevitable impurity.After heat-treating according to the method described above, obtain the steel ball with tempered sorbite tissue.
Test shows: steel ball surface hardness reaches 67HRC; Steel ball is in the medium of pH value 3-7, and erosion rate is 0.07%/year, and in the medium of pH value 7-11, erosion rate is 0.04%/year.
To sum up, obtain the steel ball with tempered sorbite tissue according to a kind of erosion resistant foundry steel ball provided by the invention and heat treating method thereof, its sheet interlayer spacing is tiny, and have strong corrosion resistance, yield strength is high, and toughness is good, and wear resisting property is excellent; In the medium of pH value 3-7, erosion rate is less than for 0.1%/year, and in the medium of pH value 7-11, erosion rate is less than for 0.08%/year.
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 (4)

1. an erosion resistant foundry steel ball, is characterized in that, the mass percent of its component and component is respectively:
C:0.2 ~ 0.3%, Cr:14 ~ 17%, Si:0.2 ~ 0.4%, Mn:1 ~ 1.5%, Cu:0.1 ~ 0.2%, P :≤0.015%, Nb:0.050 ~ 0.070%, Ti:0.1 ~ 0.2%, Co:0.35 ~ 0.65%, Mo:0.3 ~ 0.5%, Sm:0.1 ~ 0.15%, surplus is Fe and inevitable impurity.
2. a kind of erosion resistant foundry steel ball according to claim 1, it is characterized in that, it is organized as tempered sorbite.
3. a heat treating method for erosion resistant foundry steel ball, is characterized in that, comprises the following steps:
By each composition Homogeneous phase mixing by mass percentage;
Adopt main frequency furnace fusion smelting;
Molten iron is cast in mould, the cooling forming demoulding;
Chilled steel ball is heated to 1000-1050 DEG C;
With hardening liquid quenching at 850 ~ 900 DEG C, the cool time is 2min;
Tempering at 550 ~ 600 DEG C, speed of cooling 10-12 DEG C/min;
To be cooled after 200 DEG C, put into insulated tank and progressively cool to room temperature.
4. the heat treating method of a kind of erosion resistant foundry steel ball according to claim 2, is characterized in that, drawing process adopts air cooling.
CN201510634196.4A 2015-09-29 2015-09-29 Corrosion-resistant casting steel ball and heat treatment method thereof Pending CN105200327A (en)

Priority Applications (1)

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CN201510634196.4A CN105200327A (en) 2015-09-29 2015-09-29 Corrosion-resistant casting steel ball and heat treatment method thereof

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Application Number Priority Date Filing Date Title
CN201510634196.4A CN105200327A (en) 2015-09-29 2015-09-29 Corrosion-resistant casting steel ball and heat treatment method thereof

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Publication Number Publication Date
CN105200327A true CN105200327A (en) 2015-12-30

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106086672A (en) * 2016-06-16 2016-11-09 马鞍山市程鹏耐磨材料有限公司 A kind of wear-resistant complex element alloy steel ball casting and manufacture method thereof
CN110303115A (en) * 2019-05-27 2019-10-08 徐州国隆电力配件铸造有限公司 A kind of casting pattern process for the steel ball that wearability is strong

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06240354A (en) * 1993-02-16 1994-08-30 Nippon Steel Corp Production of tough thick steel plate
JP2005264298A (en) * 2004-03-22 2005-09-29 Jfe Steel Kk Metallic material for fuel cell and solid oxide type fuel cell
CN103805866A (en) * 2012-11-03 2014-05-21 无锡市森信精密机械厂 Wearable steel ball preparation process
CN104087867A (en) * 2014-07-31 2014-10-08 宁国市宁武耐磨材料有限公司 High wearing resistance anti-oxidation wear-resisting ball for ball mill
CN104109798A (en) * 2014-08-01 2014-10-22 宁国市南方耐磨材料有限公司 High-Cr abrasion-resistant cast iron steel ball
CN104120365A (en) * 2014-08-01 2014-10-29 宁国市南方耐磨材料有限公司 Impact-resistant steel ball for ball mill

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06240354A (en) * 1993-02-16 1994-08-30 Nippon Steel Corp Production of tough thick steel plate
JP2005264298A (en) * 2004-03-22 2005-09-29 Jfe Steel Kk Metallic material for fuel cell and solid oxide type fuel cell
CN103805866A (en) * 2012-11-03 2014-05-21 无锡市森信精密机械厂 Wearable steel ball preparation process
CN104087867A (en) * 2014-07-31 2014-10-08 宁国市宁武耐磨材料有限公司 High wearing resistance anti-oxidation wear-resisting ball for ball mill
CN104109798A (en) * 2014-08-01 2014-10-22 宁国市南方耐磨材料有限公司 High-Cr abrasion-resistant cast iron steel ball
CN104120365A (en) * 2014-08-01 2014-10-29 宁国市南方耐磨材料有限公司 Impact-resistant steel ball for ball mill

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106086672A (en) * 2016-06-16 2016-11-09 马鞍山市程鹏耐磨材料有限公司 A kind of wear-resistant complex element alloy steel ball casting and manufacture method thereof
CN110303115A (en) * 2019-05-27 2019-10-08 徐州国隆电力配件铸造有限公司 A kind of casting pattern process for the steel ball that wearability is strong

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