CN104174817B - A kind of ocean platform climb casting and the Technology for Heating Processing of machine Connection Block - Google Patents
A kind of ocean platform climb casting and the Technology for Heating Processing of machine Connection Block Download PDFInfo
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- CN104174817B CN104174817B CN201410416477.8A CN201410416477A CN104174817B CN 104174817 B CN104174817 B CN 104174817B CN 201410416477 A CN201410416477 A CN 201410416477A CN 104174817 B CN104174817 B CN 104174817B
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Abstract
The invention discloses a kind of ocean platform climb casting and the Technology for Heating Processing of machine Connection Block, comprising: dead head design, Pouring control and Technology for Heating Processing; The design of described dead head comprises running gate system and casting rising head is set, and described running gate system comprises cup, sprue, the ingate of mutual perforation, and described ingate tangent line is introduced; Described casting rising head comprises 3 open risers that structure is identical, size is equal; Described Pouring control comprises: orifice size, pouring temperature, the duration of pouring are controlled, and sand removal gas cutting rising head after casting; Described Technology for Heating Processing: comprise that normalizing adds tempering pretreatment and modifier treatment. By the way, running gate system of the present invention only uses rising head, without chill is set, simplify casting technique, reduce casting cost, can carry out abundant feeding to foundry goods by rising head, foundry goods be heat-treated simultaneously, can eliminate casting stress, improve mechanical castings, to reach the technical requirement of ABS to ocean platform steel-casting.
Description
Technical field
The present invention relates to metal casting technical field, particularly relate to a kind of ocean platform climb casting and the Technology for Heating Processing of machine Connection Block.
Background technology
Heavy castings due to its size and volume excessive, in industry, generally all adopt sand to cast, but sand casting can not reach the dimensional accuracy of hot investment casting, and the surface quality of foundry goods is poor, precision is low, in casting process, easily crack, the critical defect such as pore, sand holes, Internal Quality of Cast is difficult to ensure. In order to improve dimensional accuracy, the mechanical property of foundry goods, Technology for Heating Processing is also very crucial simultaneously.
When sand casting heavy castings, in casting die, generally to subsidy, chill be set in conjunction with rising head, complex process, casting cost is high.
Summary of the invention
The technical problem that the present invention mainly solves is: for the deficiencies in the prior art, the casting and the Technology for Heating Processing that provide a kind of ocean platform to climb machine Connection Block, foundry goods only use rising head carry out feeding, without chill is set, simplify casting technique, reduce casting cost, can carry out abundant feeding to foundry goods by rising head, foundry goods has been heat-treated simultaneously, eliminate casting stress, improve the internal quality of casting and mechanical property.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: the casting and the Technology for Heating Processing that provide a kind of ocean platform to climb machine Connection Block, comprising: dead head design, Pouring control and Technology for Heating Processing;
Described cast Feeder Design: comprise running gate system and casting rising head is set, described running gate system comprises cup, sprue, the ingate of mutual perforation, and the diameter of described sprue is 60mm, described ingate tangent line is introduced; Described casting rising head comprises 3 open risers that structure is identical, size is equal, and described open riser is distributed on ocean platform and climbs in the thickest bottom head covers of machine Connection Block wall;
Described Pouring control: cast ZG35Gr1Mo material is smelted the molten steel forming, orifice diameter is 50mm, pouring temperature is 1540-1560 DEG C, be 20-25s the duration of pouring, after cast 1h, obtains Connection Block foundry goods, foundry goods is incubated to 24 hours in sand mo(u)ld, then open riser is excised in sand removal again, adopts the heat mode of cutting to excise open riser, and heat is cut temperature and is not less than 200 DEG C;
Described Technology for Heating Processing: comprise that normalizing adds tempering pretreatment and modifier treatment, first described Connection Block foundry goods is carried out to normalizing and add tempering pretreatment: normalizing is warming up to 600 ± 10 DEG C and is incubated processing, temperature retention time is 1 hour; Continue to be warming up to 880 ± 10 DEG C and be incubated processing, temperature retention time is 4 hours; Air cooling is warming up to 620 ± 10 DEG C to tempering after room temperature and is incubated processing, and temperature retention time is 3 hours; Cooling to 300 DEG C with the furnace comes out of the stove below; And then described Connection Block foundry goods is carried out to modifier treatment: normalizing is warming up to 860 ± 10 DEG C and is incubated, and temperature retention time is 4 hours; The cooling rear tempering of oil quenching is warming up to 620 ± 10 DEG C and is incubated processing, and temperature retention time is 6 hours; Being chilled to 550 DEG C with stove comes out of the stove.
In a preferred embodiment of the present invention, described open riser is oval cylindricality, and it is of a size of: waist circular 200mm × 350mm(height). Open riser Sizes, makes the liquid state that has enough molten steel to supplement foundry goods in open riser shrink and solidify the volume of feeding and the rear die cavity expansion of cast.
In a preferred embodiment of the present invention, in casting process, in the time that liquid steel level rises to the 1/2-2/3 of described open riser height, in open riser, add heat preserving agent, each open riser adds heat preserving agent 2kg. Add heat preserving agent and keep the liquid time for extending open riser molten steel, improve the feeding efficiency of rising head, and can save molten steel consumption, reduction casting cost.
In a preferred embodiment of the present invention, in described Technology for Heating Processing, normalizing, tempering programming rate≤120 DEG C/h. Control programming rate, can improve thermal effectiveness, eliminate casting stress, the stable dimensions of foundry goods and improve the mechanical performance of foundry goods.
The invention has the beneficial effects as follows: running and feeding system of the present invention adopts 3 open risers, without placing chill, simplify casting technique, reduced casting cost, can carry out abundant feeding to foundry goods by rising head, ingate tangent line is introduced simultaneously, make pour steel in running channel, produce rotation, postpone the heating open riser time, be conducive to feeding and consecutive solidification, can effectively prevent the casting defects such as shrinkage cavity and porosity, crackle and distortion; After casting, again foundry goods is heat-treated, can eliminate casting stress, improve the internal quality of casting and mechanical performance.
Brief description of the drawings
The climb structural representation of machine Connection Block foundry goods of Fig. 1 ocean platform;
Fig. 2 is the climb casting technique top view of machine Connection Block of ocean platform;
Fig. 3 is the A-A cutaway view shown in Fig. 2;
In accompanying drawing, the mark of each parts is as follows: 1, bottom end face, 2, open riser, 3, sprue, 4, cup.
Detailed description of the invention
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that, protection scope of the present invention is made to more explicit defining.
Refer to Fig. 1, Fig. 2 and Fig. 3, the embodiment of the present invention comprises:
Ocean platform climb casting and the Technology for Heating Processing of machine Connection Block, comprising: dead head design, Pouring control and Technology for Heating Processing;
Described cast Feeder Design: comprise running gate system and casting rising head is set, described running gate system comprises cup 4, sprue 3 and the ingate of mutual perforation, the diameter of described sprue 3 is 60mm, described ingate tangent line is introduced, make pour steel in running channel, produce rotation, postpone to add the hot riser time, be conducive to feeding and consecutive solidification; Described casting rising head comprises 3 open risers that structure is identical, size is equal 2, and described open riser 2 is distributed on ocean platform and climbs in the thickest bottom head covers of machine Connection Block wall, can carry out abundant feeding to foundry goods by rising head;
Described Pouring control: the molten steel that the melting of cast ZG35Gr1Mo material forms, orifice diameter is 50mm, pouring temperature is 1540-1560 DEG C, and be 20-25s the duration of pouring, after cast 1h, obtain the ocean platform machine Connection Block foundry goods that climbs, foundry goods is incubated to 24 hours in sand mo(u)ld, and then open riser 2 is excised in sand removal again, adopts the heat mode of cutting to excise, and heat is cut temperature and is not less than 200 DEG C, cause casting crack in order to avoid produce rising head root stress raisers;
Described Technology for Heating Processing: comprise that normalizing adds tempering pretreatment and modifier treatment, first the described ocean platform machine Connection Block foundry goods that climbs is carried out normalizing and adds tempering pretreatment: normalizing is warming up to 600 ± 10 DEG C and is incubated processing, and temperature retention time is 1 hour; Continue to be warming up to 880 ± 10 DEG C and be incubated processing, temperature retention time is 4 hours; Air cooling is warming up to 620 ± 10 DEG C to tempering after room temperature and is incubated processing, and temperature retention time is 3 hours; Cooling to 300 DEG C with the furnace comes out of the stove below; And then the described ocean platform machine Connection Block foundry goods that climbs is carried out to modifier treatment: normalizing is warming up to 860 ± 10 DEG C and is incubated, and temperature retention time is 4 hours; The cooling rear tempering of oil quenching is warming up to 620 ± 10 DEG C and is incubated processing, and temperature retention time is 6 hours; Being chilled to 550 DEG C with stove comes out of the stove. Described Technology for Heating Processing is used for eliminating casting stress, stablizes casting dimension, improves the internal soundness of foundry goods simultaneously, improves the mechanical property of foundry goods.
Wherein, described open riser 2 is oval cylindricality, and it is of a size of: waist 200mm × 350mm(height), open riser 2 Sizes, make the liquid state that has enough molten steel to supplement foundry goods in open riser 2 shrink and solidify feeding and pour into a mould the volume that rear die cavity expands.
In casting process, in the time that liquid steel level rises to the 1/2-2/3 of described open riser height, in open riser 2, add heat preserving agent, each open riser 2 adds heat preserving agent 2kg. Add heat preserving agent and keep the liquid time for extending open riser 2 molten steel, improve the feeding efficiency of rising head, and can save molten steel consumption, reduction casting cost.
In described Technology for Heating Processing, normalizing, tempering programming rate≤120 DEG C/h. Control programming rate, can improve thermal effectiveness, eliminate casting stress, the stable dimensions of foundry goods and improve the mechanical performance of foundry goods.
Embodiment mono-:
Ocean platform climb casting and the Technology for Heating Processing of machine Connection Block, first arrange running gate system and open riser by above-mentioned requirements;
Then use pouring molten steel moulding: cast ZG35Gr1Mo material is smelted the molten steel forming, orifice diameter is 50mm, pouring temperature is 1540 DEG C, and be 20s the duration of pouring, when molten steel rises to described open riser height 1/2 time, in each open riser, respectively add 2kg heat preserving agent, after cast 1h, obtain the ocean platform machine Connection Block foundry goods that climbs, foundry goods is incubated to 24 hours in sand mo(u)ld, open riser 2 is cut in sand removal after heat, and it is 200 DEG C that heat is cut temperature;
Finally foundry goods is heat-treated: comprise that normalizing adds tempering pretreatment and modifier treatment, first the described ocean platform machine Connection Block foundry goods that climbs is carried out normalizing and adds tempering pretreatment: normalizing is warming up to 600 DEG C and is incubated processing, and temperature retention time is 1 hour; Continue to be warming up to 870 DEG C and be incubated processing, temperature retention time is 4 hours; Air cooling is warming up to 620 DEG C to tempering after room temperature and is incubated processing, and temperature retention time is 3 hours; Cooling to 300 DEG C with the furnace comes out of the stove below; And then the described ocean platform machine Connection Block foundry goods that climbs is carried out to modifier treatment: normalizing is warming up to 850 DEG C and is incubated, and temperature retention time is 4 hours; The cooling rear tempering of oil quenching is warming up to 620 DEG C and is incubated processing, and temperature retention time is 6 hours; Being chilled to 550 DEG C with stove comes out of the stove.
Embodiment bis-:
Ocean platform climb casting and the Technology for Heating Processing of machine Connection Block, first arrange running gate system and open riser by above-mentioned requirements;
Then use pouring molten steel moulding: the molten steel that the melting of cast ZG35Gr1Mo material forms, orifice diameter is 50mm, pouring temperature is 1550 DEG C, and be 23s the duration of pouring, when molten steel rises to described open riser height 1/2 time, in each open riser, respectively add 2kg heat preserving agent, after cast 1h, obtain the ocean platform machine Connection Block foundry goods that climbs, foundry goods is incubated to 24 hours in sand mo(u)ld, open riser 2 is cut in sand removal after heat, and it is 200 DEG C that heat is cut temperature;
Finally foundry goods is heat-treated: comprise that normalizing adds tempering pretreatment and modifier treatment, first the described ocean platform machine Connection Block foundry goods that climbs is carried out normalizing and adds tempering pretreatment: normalizing is warming up to 590 DEG C and is incubated processing, and temperature retention time is 1 hour; Continue to be warming up to 880 DEG C and be incubated processing, temperature retention time is 4 hours; Air cooling is warming up to 610 DEG C to tempering after room temperature and is incubated processing, and temperature retention time is 3 hours; Cooling to 300 DEG C with the furnace comes out of the stove below; And then the described ocean platform machine Connection Block foundry goods that climbs is carried out to modifier treatment: normalizing is warming up to 860 DEG C and is incubated, and temperature retention time is 4 hours; The cooling rear tempering of oil quenching is warming up to 630 DEG C and is incubated processing, and temperature retention time is 6 hours; Being chilled to 550 DEG C with stove comes out of the stove.
Embodiment tri-:
Ocean platform climb casting and the Technology for Heating Processing of machine Connection Block, first arrange running gate system and open riser by above-mentioned requirements;
Then use pouring molten steel moulding: cast ZG35Gr1Mo material is smelted the molten steel forming, orifice diameter is 50mm, pouring temperature is 1560 DEG C, and be 25s the duration of pouring, when molten steel rises to described open riser height 2/3 time, in each open riser, respectively add 2kg heat preserving agent, after cast 1h, obtain the ocean platform machine Connection Block foundry goods that climbs, foundry goods is incubated to 24 hours in sand mo(u)ld, open riser 2 is cut in sand removal after heat, and it is 230 DEG C that heat is cut temperature;
Finally foundry goods is heat-treated: comprise that normalizing adds tempering pretreatment and modifier treatment, first the described ocean platform machine Connection Block foundry goods that climbs is carried out normalizing and adds tempering pretreatment: normalizing is warming up to 610 DEG C and is incubated processing, and temperature retention time is 1 hour; Continue to be warming up to 890 DEG C and be incubated processing, temperature retention time is 4 hours; Air cooling is warming up to 630 DEG C to tempering after room temperature and is incubated processing, and temperature retention time is 3 hours; Cooling to 300 DEG C with the furnace comes out of the stove below; And then the described ocean platform machine Connection Block foundry goods that climbs is carried out to modifier treatment: normalizing is warming up to 870 DEG C and is incubated, and temperature retention time is 4 hours; The cooling rear tempering of oil quenching is warming up to 610 DEG C and is incubated processing, and temperature retention time is 6 hours; Being chilled to 550 DEG C with stove comes out of the stove.
The present invention has disclosed a kind of ocean platform climb casting and the Technology for Heating Processing of machine Connection Block, foundry goods only adopt 3 open risers, without place chill, simplify casting technique, reduced casting cost, can carry out abundant feeding to foundry goods by rising head, ingate tangent line is introduced simultaneously, make pour steel in running channel, produce rotation, postpone the heating open riser time, be conducive to feeding and consecutive solidification, can effectively prevent the casting defects such as shrinkage cavity and porosity, crackle and distortion; After casting, again foundry goods is heat-treated, can eliminate casting stress, improve the internal quality of casting and mechanical performance. The ocean platform making by this technique climb machine Connection Block foundry goods mechanical performance meet: yield strength >=490MPa, tensile strength >=690MPa, percentage elongation >=11%, the contraction percentage of area >=25% ,-20 DEG C of φ impact value AKV >=21J, hardness 200 ~ 220HB.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes description of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (4)
1. ocean platform casting and the Technology for Heating Processing for machine Connection Block of climbing, is characterized in that, comprising: dead head design, Pouring control and Technology for Heating Processing;
Described dead head design: comprise the design of running gate system and casting rising head, described running gate system comprises cup, sprue, the ingate of mutual perforation, and the diameter of described sprue is 60mm, and described ingate tangent line is introduced; Described casting rising head comprises 3 open risers that structure is identical, size is equal, and described open riser is distributed on ocean platform and climbs in the thickest bottom head covers of machine Connection Block wall;
Described Pouring control: the molten steel that the melting of cast ZG35Gr1Mo material forms, orifice diameter is 50mm, pouring temperature is 1540-1560 DEG C, be 20-25s the duration of pouring, after cast 1h, obtains the ocean platform machine Connection Block foundry goods that climbs, foundry goods is incubated to 24 hours in sand mo(u)ld, then open riser is excised in sand removal again, adopts the heat mode of cutting to excise open riser, and heat is cut temperature and is not less than 200 DEG C;
Described Technology for Heating Processing: comprise that normalizing adds tempering pretreatment and modifier treatment, first the described ocean platform machine Connection Block foundry goods that climbs is carried out normalizing and adds tempering pretreatment: normalizing is warming up to 600 ± 10 DEG C and is incubated processing, and temperature retention time is 1 hour; Continue to be warming up to 880 ± 10 DEG C and be incubated processing, temperature retention time is 4 hours; Air cooling is warming up to 620 ± 10 DEG C to tempering after room temperature and is incubated processing, and temperature retention time is 3 hours; Cooling to 300 DEG C with the furnace comes out of the stove below; And then the described ocean platform machine Connection Block foundry goods that climbs is carried out to modifier treatment: normalizing is warming up to 860 ± 10 DEG C and is incubated, and temperature retention time is 4 hours; The cooling rear tempering of oil quenching is warming up to 620 ± 10 DEG C and is incubated processing, and temperature retention time is 6 hours; Being chilled to 550 DEG C with stove comes out of the stove.
2. ocean platform according to claim 1 casting and the Technology for Heating Processing of machine Connection Block of climbing, is characterized in that, described rising head is oval cylindricality, and it is of a size of: waist 200mm × height 350mm.
3. ocean platform according to claim 1 casting and the Technology for Heating Processing of machine Connection Block of climbing, it is characterized in that, in casting process, in the time that liquid steel level rises to the 1/2-2/3 of described open riser height, in open riser, add heat preserving agent, each open riser adds heat preserving agent 2kg.
4. ocean platform according to claim 1 casting and the Technology for Heating Processing of machine Connection Block of climbing, is characterized in that, in described Technology for Heating Processing, and normalizing, tempering programming rate≤100 DEG C/h.
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| CN201410416477.8A CN104174817B (en) | 2014-08-22 | 2014-08-22 | A kind of ocean platform climb casting and the Technology for Heating Processing of machine Connection Block |
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| CN201410416477.8A CN104174817B (en) | 2014-08-22 | 2014-08-22 | A kind of ocean platform climb casting and the Technology for Heating Processing of machine Connection Block |
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| CN104174817B true CN104174817B (en) | 2016-05-11 |
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| CN109082513B (en) * | 2018-09-12 | 2022-04-15 | 新乡市长城铸钢有限公司 | Heat treatment process for large pump shell |
| CN112872297B (en) * | 2020-12-25 | 2023-04-25 | 兰州高压阀门有限公司 | Stepped feeding casting process for large-sized profile section casting |
| CN116037856A (en) * | 2022-12-01 | 2023-05-02 | 镇江同舟螺旋桨有限公司 | Production process for pouring riser of large propeller for multiple repair pouring |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS603941A (en) * | 1983-06-21 | 1985-01-10 | Asahi Malleable Iron Co Ltd | Casting method of cylindrical body |
| CN103212672A (en) * | 2013-03-15 | 2013-07-24 | 马钢(集团)控股有限公司 | Method for casting low speed diesel engine cylinder cap for large cylinder diameter boat |
| CN103878312A (en) * | 2012-12-19 | 2014-06-25 | 江苏华东风能科技有限公司 | Novel casting and pouring system for conical support casting of wind driven generator |
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2014
- 2014-08-22 CN CN201410416477.8A patent/CN104174817B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS603941A (en) * | 1983-06-21 | 1985-01-10 | Asahi Malleable Iron Co Ltd | Casting method of cylindrical body |
| CN103878312A (en) * | 2012-12-19 | 2014-06-25 | 江苏华东风能科技有限公司 | Novel casting and pouring system for conical support casting of wind driven generator |
| CN103212672A (en) * | 2013-03-15 | 2013-07-24 | 马钢(集团)控股有限公司 | Method for casting low speed diesel engine cylinder cap for large cylinder diameter boat |
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