CN105483500A - Preparation method of automobile engine cylinder block - Google Patents
Preparation method of automobile engine cylinder block Download PDFInfo
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- CN105483500A CN105483500A CN201510826055.2A CN201510826055A CN105483500A CN 105483500 A CN105483500 A CN 105483500A CN 201510826055 A CN201510826055 A CN 201510826055A CN 105483500 A CN105483500 A CN 105483500A
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Abstract
The invention discloses a preparation method of an automobile engine cylinder block. The automobile engine cylinder block comprises the following raw materials in parts by weight: 11 parts of a hard phase, 35 parts of a bonding phase, 2 parts of an inhibiting phase and 35 parts of an alloy phase. The preparation method comprises the following steps: stirring the raw materials, pressing the raw materials, and conducting sinter molding on the pressed raw material. The hard phase comprises the following raw materials according to the mass ratio: 10-12 percent of silicon carbide, 1-3 percent of tantalum carbide, 0.7-1.2 percent of niobium carbide, 0.7-0.9 percent of TiC, 0.3-0.6 percent of neodymium, 2.3-3.6 percent of Cr3C2, and the balance of tungsten carbide. The bonding phase comprises the following raw materials according to the mass ratio: 6-8 percent of NiAl, 20-32 percent of Co, and the balance of Fe. The preparation method has the advantages that a standard dose barrel is adopted so as to feed a pressing blank mold, the accuracy is high, the compactness of a part blank is high, the qualified rate is high, quenching and tempering processes are specially added, the internal stress generated after crystallization is small, and the processability is high.
Description
Technical field
The present invention relates to cylinder body preparation field, specifically belong to a kind of automobile engine cylinder-body preparation method.
Background technology
Automobile engine cylinder-body is the vitals in automobile gearbox.Its overall precision and performance directly decide the safety and stability of wheel box.Belong to high-density, high strength, high-precision parts with complex structures.
At present, domestic powder metallurgy automobile engine cylinder-body is high because of precision prescribed, by can not directly reach drawing and technical requirements after the compacting of pressing powder metallurgy press, sintering, also will carry out postorder processing.Powder metallurgy synchronizer tooth hub adopts high strength powder to make, particularly the D39 material that adopts with tooth hub of high-grade car, and sinter rear surface hardness and reach more than HV5300, postorder finishing and digital control processing are all very difficult, and digital control processing must adopt special tool.
The order of existing engine cylinder body processing technology is compression moulding, sintering, shaping, digital control processing, quenching, cleaning and packaging.
Summary of the invention
For the problems referred to above, the object of this invention is to provide a kind of precision high, part blank compactness is good, and qualification rate is high, the automobile engine cylinder-body preparation method that processing characteristics is good.
Technical scheme of the present invention is as follows:
A kind of automobile engine cylinder-body preparation method, includes following production stage:
1), raw material prepares: be made up of the raw material of following weight part: 6-8 part hard phase, the bonding phase of 24-26 part, 4-5 part suppress phase, 32-34 part alloy phase forms, and described hard phase is made up of the raw material of following mass ratio: 4-6% silicon carbide, 2-4% tantalum carbide, 1.7-2.2% niobium carbide, 0.4-0.5% neodymium, 1.2-1.4%Cr
3c
2, surplus is wolfram varbide; Described alloy phase is made up of the raw material of following mass ratio: 12-14% silicon carbide, 15-17% niobium carbide, 12-14%Fe powder, 24-28%NbC, surplus are neodymium;
2), raw material mixing, after above-mentioned raw materials is mixed, add mixture total mass 16-18% ethanol as grinding medium, add mixture total mass 6-8% tensio-active agent, after grinding drying in 4-7 hour, sinter 4-5 hour at 950-120 DEG C, continue grinding and obtain 40-50 μm of powder, then carry out sinter molding;
3), cylinder body sintered part is heated to 560-600 DEG C, keep 1-2 hour, 780-800 DEG C is warming up to again in 58-65 minute, quench cooled is carried out with quenching oil, again the cylinder body sintered part after quenching is carried out tempering 60-70 minute at 420-500 DEG C, then taking-up puts into the tempering oil of 220-250 DEG C with oily slow cooling from tempering stove.
Raw material prepares: the raw material composition of following weight part: 7 parts of hard phases, 25 parts of bonding phases, 6 parts of suppression phases, 33 parts of alloy phases compositions.
Beneficial effect of the present invention:
The present invention directly adopts powder material, without the need to primary comminution, adopts standard dose bucket to the feeding of pressed compact mould, precision is high, and part blank compactness is good, and qualification rate is high, and special employing adds quenching, tempering process, the internal stress after crystal formation is little, and processing characteristics is good.
Embodiment
Below in conjunction with specific embodiment, illustrate the present invention further, these embodiments should be understood only for illustration of the present invention
A kind of automobile engine cylinder-body preparation method, includes following production stage:
1), raw material prepares: be made up of the raw material of following weight part: 7 parts of hard phases, 25 parts of bonding phases, 6 parts of suppression phases, 33 parts of alloy phases form, and described hard phase is made up of the raw material of following mass ratio: 4-6% silicon carbide, 2-4% tantalum carbide, 1.7-2.2% niobium carbide, 0.4-0.5% neodymium, 1.2-1.4%Cr
3c
2, surplus is wolfram varbide; Described alloy phase is made up of the raw material of following mass ratio: 12-14% silicon carbide, 15-17% niobium carbide, 12-14%Fe powder, 24-28%NbC, surplus are neodymium;
2), raw material mixing, after above-mentioned raw materials is mixed, add mixture total mass 16-18% ethanol as grinding medium, add mixture total mass 6-8% tensio-active agent, after grinding drying in 4-7 hour, sinter 4-5 hour at 950-120 DEG C, continue grinding and obtain 40-50 μm of powder, then carry out sinter molding;
3), cylinder body sintered part is heated to 560-600 DEG C, keep 1-2 hour, 780-800 DEG C is warming up to again in 58-65 minute, quench cooled is carried out with quenching oil, again the cylinder body sintered part after quenching is carried out tempering 60-70 minute at 420-500 DEG C, then taking-up puts into the tempering oil of 220-250 DEG C with oily slow cooling from tempering stove.
According to the automobile engine cylinder-body preparation method material that the present invention produces, experimental data is as follows:
Yield strength σ s (MPa):>=920, elongation δ 5 (%):>=9.8, relative reduction in area ψ (%):>=42.6, Impact energy Ak v (J):>=54, notched bar impact strength α kv (J/cm
2):>=61.
Claims (2)
1. an automobile engine cylinder-body preparation method, is characterized in that, includes following production stage:
1), raw material prepares: be made up of the raw material of following weight part: 6-8 part hard phase, the bonding phase of 24-26 part, 4-5 part suppress phase, 32-34 part alloy phase forms, and described hard phase is made up of the raw material of following mass ratio: 4-6% silicon carbide, 2-4% tantalum carbide, 1.7-2.2% niobium carbide, 0.4-0.5% neodymium, 1.2-1.4%Cr
3c
2, surplus is wolfram varbide; Described alloy phase is made up of the raw material of following mass ratio: 12-14% silicon carbide, 15-17% niobium carbide, 12-14%Fe powder, 24-28%NbC, surplus are neodymium;
2), raw material mixing, after above-mentioned raw materials is mixed, add mixture total mass 16-18% ethanol as grinding medium, add mixture total mass 6-8% tensio-active agent, after grinding drying in 4-7 hour, sinter 4-5 hour at 950-120 DEG C, continue grinding and obtain 40-50 μm of powder, then carry out sinter molding;
3), cylinder body sintered part is heated to 560-600 DEG C, keep 1-2 hour, 780-800 DEG C is warming up to again in 58-65 minute, quench cooled is carried out with quenching oil, again the cylinder body sintered part after quenching is carried out tempering 60-70 minute at 420-500 DEG C, then taking-up puts into the tempering oil of 220-250 DEG C with oily slow cooling from tempering stove.
2. automobile engine cylinder-body preparation method according to claim 1, is characterized in that: the raw material composition of following weight part: 7 parts of hard phases, 25 parts of bonding phases, 6 parts of suppression phases, 33 parts of alloy phases compositions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510826055.2A CN105483500A (en) | 2015-11-25 | 2015-11-25 | Preparation method of automobile engine cylinder block |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510826055.2A CN105483500A (en) | 2015-11-25 | 2015-11-25 | Preparation method of automobile engine cylinder block |
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| CN105483500A true CN105483500A (en) | 2016-04-13 |
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| CN201510826055.2A Pending CN105483500A (en) | 2015-11-25 | 2015-11-25 | Preparation method of automobile engine cylinder block |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112251583A (en) * | 2020-09-15 | 2021-01-22 | 扬州扬子江宝云缸套有限公司 | Heat treatment process for engine cylinder block |
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| CN101248204A (en) * | 2005-08-24 | 2008-08-20 | 尤迪霍尔姆工具公司 | Steel alloy and tools or components manufactured out of the steel alloy |
| CN102162070A (en) * | 2011-03-30 | 2011-08-24 | 中南大学 | Connecting rod material for engines in powder metallurgy and preparation method thereof |
| CN103388097A (en) * | 2013-06-29 | 2013-11-13 | 蚌埠市鸿安精密机械有限公司 | Carbide tool |
| CN103388088A (en) * | 2013-06-29 | 2013-11-13 | 蚌埠市鸿安精密机械有限公司 | Cemented carbide reamer |
| CN103388098A (en) * | 2013-06-29 | 2013-11-13 | 蚌埠市鸿安精密机械有限公司 | Carbide hobbing cutter |
| CN104084589A (en) * | 2014-06-06 | 2014-10-08 | 马鞍山市恒毅机械制造有限公司 | Powder metallurgical automobile hub bearing unit |
| CN105110796A (en) * | 2015-08-27 | 2015-12-02 | 苏州莱特复合材料有限公司 | Built-in cylinder liner of automobile engine and powder metallurgy preparation method thereof |
-
2015
- 2015-11-25 CN CN201510826055.2A patent/CN105483500A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101248204A (en) * | 2005-08-24 | 2008-08-20 | 尤迪霍尔姆工具公司 | Steel alloy and tools or components manufactured out of the steel alloy |
| CN102162070A (en) * | 2011-03-30 | 2011-08-24 | 中南大学 | Connecting rod material for engines in powder metallurgy and preparation method thereof |
| CN103388097A (en) * | 2013-06-29 | 2013-11-13 | 蚌埠市鸿安精密机械有限公司 | Carbide tool |
| CN103388088A (en) * | 2013-06-29 | 2013-11-13 | 蚌埠市鸿安精密机械有限公司 | Cemented carbide reamer |
| CN103388098A (en) * | 2013-06-29 | 2013-11-13 | 蚌埠市鸿安精密机械有限公司 | Carbide hobbing cutter |
| CN104084589A (en) * | 2014-06-06 | 2014-10-08 | 马鞍山市恒毅机械制造有限公司 | Powder metallurgical automobile hub bearing unit |
| CN105110796A (en) * | 2015-08-27 | 2015-12-02 | 苏州莱特复合材料有限公司 | Built-in cylinder liner of automobile engine and powder metallurgy preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112251583A (en) * | 2020-09-15 | 2021-01-22 | 扬州扬子江宝云缸套有限公司 | Heat treatment process for engine cylinder block |
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