CN103834771A - Heat treatment method of wear-resistant cast steel - Google Patents
Heat treatment method of wear-resistant cast steel Download PDFInfo
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- CN103834771A CN103834771A CN201410081973.2A CN201410081973A CN103834771A CN 103834771 A CN103834771 A CN 103834771A CN 201410081973 A CN201410081973 A CN 201410081973A CN 103834771 A CN103834771 A CN 103834771A
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Abstract
The invention discloses a heat treatment method of wear-resistant cast steel. The cast steel comprises the following chemical components in percent by weight: 0.32-0.34% of C, 0.90-0.95% of Mn, 1.1-1.3% of Si, 1.8-2.1% of Cr, 0.35-5% of Ni, 0.02-0.03% of Ti, 0.18-0.22% of V and the balance of iron. The heat treatment method comprises the following steps: (1) normalizing, namely performing heat preservation on the wear-resistant cast steel in a normalizing furnace at a temperature of 1060 DEG C for 24 hours, and cooling the wear-resistant cast steel to room temperature in the normalizing furnace; (2) quenching, namely performing heat preservation on the wear-resistant cast steel in a quenching furnace with a temperature of 920-960 DEG C for 30 minutes, taking out the wear-resistant cast steel, and water-cooling the wear-resistant cast steel to room temperature; (3) tempering, namely performing heat preservation on the wear-resistant cast steel in a tempering furnace with a temperature of 260 DEG C for 2 hours, taking out the wear-resistant cast steel, and air cooling the wear-resistant cast steel to the room temperature. While ensuring high hardness, the wear-resistant cast steel has good toughness, and the process is simple and stable.
Description
Technical field
The present invention relates to a kind of heat treating method of wearable cast steel, particularly a kind of heat treating method of the wearable cast steel with high hard toughness.
Background technology
Wearing and tearing are many industrial sector ubiquities and become a major reason that causes equipment failure or material damage, and it has also consumed a large amount of energy and material simultaneously.The various engineering excavation machines of being manufactured by wear-resistant alloy cast steel and shovel loader bucket tooth, various Wearproof transfer piping made, various grinder hammerhead and jaw, various grip-pad, due in the working conditions such as high strength, atrocious weather, its wear pattern is more serious.
In existing foundry engieering, conventionally adopt vacuum heat treatment or annealing thermal treatment, after thermal treatment, take polishing or machining mode to process steel casting, can increase like this aftertreatment cost of steel casting, increase workpeople's workload simultaneously; And complex process is unstable.
Summary of the invention
The object of the invention is to, a kind of heat treating method of wearable cast steel is provided.The present invention, in guaranteeing high rigidity, has good toughness, and technique simple and stable.
Technical scheme of the present invention: the heat treating method of wearable cast steel, is characterized in that: the chemical composition of described cast steel and mass percent thereof are: C:0.32-0.34; Mn:0.90-0.95; Si:1.1-1.3; Cr:1.8-2.1; Ni:0.3.5-5; Ti:0.02-0.03; V:0.18-0.22; Surplus is iron;
Described heat treating method comprises:
1. normalizing: it is that the normalizing furnace of 1060 ℃ is incubated 24h that described wearable cast steel is placed in to temperature, is chilled to room temperature in normalizing furnace;
2. quench: in temperature is the quenching furnance of 920-960 ℃, be incubated 30min, take out water-cooled to room temperature;
3. tempering: be incubated 2h in the tempering stove of 260 ℃ of temperature, take out air cooling to room temperature.
In the heat treating method of aforesaid wearable cast steel, the hardness of described wearable cast steel: 48-50HRC, impelling strength Akv13-15J.
In the heat treating method of aforesaid wearable cast steel, the tissue of described wearable cast steel is mainly tempering lath martensite, residual austenite and a small amount of carbide.
In the heat treating method of aforesaid wearable cast steel, the size of described carbide is at 30-40nm.
Compared with prior art, steel casting thermal treatment process provided by the invention, its beneficial effect is, and this technique is easily understood, and has improved the mechanical property of steel casting, and thermal treatment cost is very low, and cast(ing) surface aftertreatment workload is little, and casting dimension accuracy is high.Adopt the combination of quenching and low-temperaturetempering, technological operation is simple, superior performance.The present invention can eliminate the dendritic segregation producing in castingprocesses, makes microstructure homogenization, reduces directivity, comparatively stable.
The invention has the advantages that: 1, microalloy treatment technique advanced person, good stability; 2, thermal treatment process is simple, and low-temperaturetempering processing, has saved the energy, has reduced production cost; 3, the coupling that adopts rational alloying element, high without hardness, and good toughness; 4, rational chromium content, can improve matrix, improves hardening capacity.
Embodiment
Below in conjunction with embodiment, the present invention is further illustrated, but not as the foundation to the present invention's restriction.
Embodiment.The heat treating method of wearable cast steel, feature is: the chemical composition of described cast steel and mass percent thereof are: C:0.32-0.34; Mn:0.90-0.95; Si:1.1-1.3; Cr:1.8-2.1; Ni:0.3.5-5; Ti:0.02-0.03; V:0.18-0.22; Surplus is iron;
Described heat treating method comprises:
1. normalizing: it is that the normalizing furnace of 1060 ℃ is incubated 24h that described wearable cast steel is placed in to temperature, is chilled to room temperature in normalizing furnace;
2. quench: in temperature is the quenching furnance of 920-960 ℃, be incubated 30min, take out water-cooled to room temperature;
3. tempering: be incubated 2h in the tempering stove of 260 ℃ of temperature, take out air cooling to room temperature.
The hardness of described wearable cast steel: 48-50HRC, impelling strength Akv13-15J.The tissue of described wearable cast steel is mainly tempering lath martensite, residual austenite and a small amount of carbide.The size of described carbide is at 30-40nm.
Claims (4)
1. the heat treating method of wearable cast steel, is characterized in that: the chemical composition of described cast steel and mass percent thereof are: C:0.32-0.34; Mn:0.90-0.95; Si:1.1-1.3; Cr:1.8-2.1; Ni:0.3.5-5; Ti:0.02-0.03; V:0.18-0.22; Surplus is iron;
Described heat treating method comprises:
1. normalizing: it is that the normalizing furnace of 1060 ℃ is incubated 24h that described wearable cast steel is placed in to temperature, is chilled to room temperature in normalizing furnace;
2. quench: in temperature is the quenching furnance of 920-960 ℃, be incubated 30min, take out water-cooled to room temperature;
3. tempering: be incubated 2h in the tempering stove of 260 ℃ of temperature, take out air cooling to room temperature.
2. the heat treating method of wearable cast steel according to claim 1, is characterized in that: the hardness of described wearable cast steel: 48-50HRC, impelling strength Akv13-15J.
3. the heat treating method of wearable cast steel according to claim 1 and 2, is characterized in that: the tissue of described wearable cast steel is mainly tempering lath martensite, residual austenite and a small amount of carbide.
4. the heat treating method of wearable cast steel according to claim 3, is characterized in that: the size of described carbide is at 30-40nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410081973.2A CN103834771B (en) | 2014-03-07 | 2014-03-07 | The heat treating method of wearable cast steel |
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| CN201410081973.2A CN103834771B (en) | 2014-03-07 | 2014-03-07 | The heat treating method of wearable cast steel |
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| CN103834771A true CN103834771A (en) | 2014-06-04 |
| CN103834771B CN103834771B (en) | 2015-10-28 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104325073A (en) * | 2014-10-27 | 2015-02-04 | 大丰市洪联铸钢有限责任公司 | Casting technology of wear-resistant and low-porosity steel casting |
| CN104946858A (en) * | 2015-07-29 | 2015-09-30 | 山东伊莱特重工有限公司 | High-temperature short-time heating surface strengthening processing process |
| CN106676390A (en) * | 2017-03-28 | 2017-05-17 | 宁波禾顺新材料有限公司 | Low-carbon martensite cast steel applied to heavy cross section and heat treatment method of low-carbon martensite cast steel |
| CN106834936A (en) * | 2016-12-29 | 2017-06-13 | 兰州兰石集团有限公司 | Agricultural machinery deep soil loosing shovel abrasion resistant cast steel and its Technology for Heating Processing |
| CN109252099A (en) * | 2018-10-30 | 2019-01-22 | 河北冀凯铸业有限公司 | A kind of high-toughness high-strength cast steel wear-resistant material and preparation method thereof |
| CN110923431A (en) * | 2019-11-25 | 2020-03-27 | 宁波铭汇金属科技有限公司 | Heat treatment method of hammer head steel casting |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104325073A (en) * | 2014-10-27 | 2015-02-04 | 大丰市洪联铸钢有限责任公司 | Casting technology of wear-resistant and low-porosity steel casting |
| CN104946858A (en) * | 2015-07-29 | 2015-09-30 | 山东伊莱特重工有限公司 | High-temperature short-time heating surface strengthening processing process |
| CN106834936A (en) * | 2016-12-29 | 2017-06-13 | 兰州兰石集团有限公司 | Agricultural machinery deep soil loosing shovel abrasion resistant cast steel and its Technology for Heating Processing |
| CN106676390A (en) * | 2017-03-28 | 2017-05-17 | 宁波禾顺新材料有限公司 | Low-carbon martensite cast steel applied to heavy cross section and heat treatment method of low-carbon martensite cast steel |
| CN109252099A (en) * | 2018-10-30 | 2019-01-22 | 河北冀凯铸业有限公司 | A kind of high-toughness high-strength cast steel wear-resistant material and preparation method thereof |
| CN110923431A (en) * | 2019-11-25 | 2020-03-27 | 宁波铭汇金属科技有限公司 | Heat treatment method of hammer head steel casting |
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| CN103834771B (en) | 2015-10-28 |
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