CN110904383A - Sintering method for trolley pin - Google Patents
Sintering method for trolley pin Download PDFInfo
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- CN110904383A CN110904383A CN201911210656.5A CN201911210656A CN110904383A CN 110904383 A CN110904383 A CN 110904383A CN 201911210656 A CN201911210656 A CN 201911210656A CN 110904383 A CN110904383 A CN 110904383A
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- Prior art keywords
- pin
- sintering method
- casting
- trolley
- continuous casting
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a sintering method of a trolley pin, which comprises the following raw materials in parts by mass: 0.04-0.08 part of C, 0.15-0.35 part of Si, 1.25-1.65 parts of Mn, 0.035-0.055 part of Al, 0.135-0.155 part of Nb, 0.015-0.035 part of Ti, 0.01-0.03 part of Cr, 0.021-0.025 part of P, 0.003-0.007 part of S, 0.045-0.065 part of N and 100 parts of Fe; compared with the original process, the process improves the wear resistance and the service life of the trolley pin.
Description
Technical Field
The invention particularly relates to a sintering method of a trolley pin, and belongs to the field of metallurgy.
Background
The trolley pin used in the sintering workshop is originally formed by welding a steel plate and round steel for a fitter workshop after finish machining, but is easy to deform due to long-term high-temperature working environment, short in service life and wasteful of manpower for replacement.
Disclosure of Invention
The invention aims to develop a trolley pin sintering method, and solve the technical problems that pins in the prior art are easy to deform, short in service life, waste in manual replacement and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
the sintering method of the trolley pin comprises the following raw materials in parts by weight: 0.04-0.08 part of C, 0.15-0.35 part of Si, 1.25-1.65 parts of Mn, 0.035-0.055 part of Al, 0.135-0.155 part of Nb, 0.015-0.035 part of Ti, 0.01-0.03 part of Cr, 0.021-0.025 part of P, 0.003-0.007 part of S, 0.045-0.065 part of N and 100 parts of Fe;
the first step is as follows: opening a precision casting wax mold, roughly smelting the raw materials, then feeding the raw materials into a refining furnace LF for refining to obtain a pin casting blank S content of less than or equal to 0.005%, and feeding the pin casting blank into a continuous casting machine for continuous casting and rolling;
the second step is that: soaking the pin casting blank after continuous casting and rolling by an induction heating device, controlling the temperature to be 1120-1220 ℃, reheating for not less than 300min in a furnace, and rough rolling;
the third step: wax mould forming, molding sand shell making, adjusting the position of a pouring gate, integrally forming after molten iron pouring, ultrasonically detecting flaws, cutting and forming a casting head, and then warehousing.
As a preferred technical scheme of the invention: and the first step of rough smelting comprises KR desulfurization and converter smelting.
As a preferred technical scheme of the invention: and before the pin casting blank in the first step is put into a continuous casting machine for continuous casting, RH vacuum treatment, wire feeding and soft stirring are carried out.
As a preferred technical scheme of the invention: after KR desulfurization treatment, the content of S in the molten iron is less than or equal to 0.010 percent.
As a preferred technical scheme of the invention: the H content in the steel after the RH vacuum treatment is less than 2 ppm.
Has the advantages that:
compared with the prior art, the invention has the beneficial effects that: compared with the original process, the process improves the wear resistance and the service life of the trolley pin, has the advantages of good performance, low production cost, high production efficiency and small quality risk, and has great popularization value.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example 1:
a trolley pin sintering method is characterized in that: the trolley pin is prepared from the following raw materials in parts by weight: 0.04-0.08 part of C, 0.15-0.35 part of Si, 1.25-1.65 parts of Mn, 0.035-0.055 part of Al, 0.135-0.155 part of Nb, 0.015-0.035 part of Ti, 0.01-0.03 part of Cr, 0.021-0.025 part of P, 0.003-0.007 part of S, 0.045-0.065 part of N and 100 parts of Fe;
the first step is as follows: opening a precision casting wax mold, desulfurizing raw materials KR, feeding the KR into a refining furnace LF for refining after smelting in a converter, and feeding the pin casting blank into a continuous casting machine for continuous casting and rolling, wherein the content of molten iron S is less than or equal to 0.010%;
the second step is that: soaking the pin casting blank after continuous casting and rolling by an induction heating device, controlling the temperature to be 1120-1220 ℃, reheating for not less than 300min in a furnace, and rough rolling;
the third step: wax mould forming, molding sand shell making, adjusting the position of a pouring gate, integrally forming after molten iron pouring, ultrasonically detecting flaws, cutting and forming a casting head, and then warehousing.
Example 2:
a trolley pin sintering method is characterized in that: the trolley pin is prepared from the following raw materials in parts by weight: 0.04-0.08 part of C, 0.15-0.35 part of Si, 1.25-1.65 parts of Mn, 0.035-0.055 part of Al, 0.135-0.155 part of Nb, 0.015-0.035 part of Ti, 0.01-0.03 part of Cr, 0.021-0.025 part of P, 0.003-0.007 part of S, 0.045-0.065 part of N and 100 parts of Fe;
the first step is as follows: opening a precision casting wax mold, desulfurizing raw materials KR, feeding the KR into a refining furnace LF for refining after smelting in a converter, and feeding the pin casting blank into a continuous casting machine for continuous casting and rolling, wherein the content of molten iron S is less than or equal to 0.010%;
the second step is that: soaking the pin casting blank after continuous casting and rolling by an induction heating device, controlling the temperature to be 1120-1220 ℃, reheating for not less than 300min in a furnace, and rough rolling;
the third step: wax mould forming, molding sand shell making, adjusting the position of a pouring gate, integrally forming after molten iron pouring, ultrasonically detecting flaws, cutting and forming a casting head, and then warehousing.
Before the pin casting blank is put into a continuous casting machine, RH vacuum treatment, wire feeding and soft stirring are carried out.
Example 3:
a trolley pin sintering method is characterized in that: the trolley pin is prepared from the following raw materials in parts by weight: 0.04-0.08 part of C, 0.15-0.35 part of Si, 1.25-1.65 parts of Mn, 0.035-0.055 part of Al, 0.135-0.155 part of Nb, 0.015-0.035 part of Ti, 0.01-0.03 part of Cr, 0.021-0.025 part of P, 0.003-0.007 part of S, 0.045-0.065 part of N and 100 parts of Fe;
the first step is as follows: opening a precision casting wax mold, desulfurizing raw materials KR, feeding the KR into a refining furnace LF for refining after smelting in a converter, and feeding the pin casting blank into a continuous casting machine for continuous casting and rolling, wherein the content of molten iron S is less than or equal to 0.010%;
the second step is that: soaking the pin casting blank after continuous casting and rolling by an induction heating device, controlling the temperature to be 1120-1220 ℃, reheating for not less than 300min in a furnace, and rough rolling;
the third step: wax mould forming, molding sand shell making, adjusting the position of a pouring gate, integrally forming after molten iron pouring, ultrasonically detecting flaws, cutting and forming a casting head, and then warehousing.
Before the pin casting blank is put into a continuous casting machine, RH vacuum treatment, wire feeding and soft stirring are carried out.
The H content in the steel after RH vacuum treatment is less than 2 ppm.
Claims (5)
1. A trolley pin sintering method is characterized in that: the trolley pin is prepared from the following raw materials in parts by weight: 0.04-0.08 part of C, 0.15-0.35 part of Si, 1.25-1.65 parts of Mn, 0.035-0.055 part of Al, 0.135-0.155 part of Nb, 0.015-0.035 part of Ti, 0.01-0.03 part of Cr, 0.021-0.025 part of P, 0.003-0.007 part of S, 0.045-0.065 part of N and 100 parts of Fe;
the first step is as follows: opening a precision casting wax mold, roughly smelting the raw materials, then feeding the raw materials into a refining furnace LF for refining to obtain a pin casting blank S content of less than or equal to 0.005%, and feeding the pin casting blank into a continuous casting machine for continuous casting and rolling;
the second step is that: soaking the pin casting blank after continuous casting and rolling by an induction heating device, controlling the temperature to be 1120-1220 ℃, reheating for not less than 300min in a furnace, and rough rolling;
the third step: wax mould forming, molding sand shell making, adjusting the position of a pouring gate, integrally forming after molten iron pouring, ultrasonically detecting flaws, cutting and forming a casting head, and then warehousing.
2. The trolley pin sintering method according to claim 1, characterized in that: and the first step of rough smelting comprises KR desulfurization and converter smelting.
3. The trolley pin sintering method according to claim 1, characterized in that: and before the pin casting blank in the first step is put into a continuous casting machine for continuous casting, RH vacuum treatment, wire feeding and soft stirring are carried out.
4. The trolley pin sintering method according to claim 2, characterized in that: after KR desulfurization treatment, the content of S in the molten iron is less than or equal to 0.010 percent.
5. The trolley pin sintering method according to claim 3, characterized in that: the H content in the steel after the RH vacuum treatment is less than 2 ppm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911210656.5A CN110904383A (en) | 2019-12-02 | 2019-12-02 | Sintering method for trolley pin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911210656.5A CN110904383A (en) | 2019-12-02 | 2019-12-02 | Sintering method for trolley pin |
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| Publication Number | Publication Date |
|---|---|
| CN110904383A true CN110904383A (en) | 2020-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911210656.5A Pending CN110904383A (en) | 2019-12-02 | 2019-12-02 | Sintering method for trolley pin |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH093604A (en) * | 1995-06-23 | 1997-01-07 | Daido Steel Co Ltd | High speed tool steel for precision casting |
| CN100410555C (en) * | 2006-09-28 | 2008-08-13 | 大连三环复合材料技术开发有限公司 | Stainless steel solid bearing holder and its making method |
| CN103252449A (en) * | 2013-05-08 | 2013-08-21 | 青岛钰鑫车辆工程有限公司 | Production method of composite material stirring wing |
| CN104404387A (en) * | 2014-10-29 | 2015-03-11 | 江苏沙钢集团有限公司 | Steel plate for ultralow-temperature and high-pressure service delivery tubes, and its making method |
| CN104439074A (en) * | 2014-11-27 | 2015-03-25 | 宁波通达精密铸造有限公司 | Fusible mold precision casting method |
| CN110306111A (en) * | 2019-07-17 | 2019-10-08 | 张家港宏昌钢板有限公司 | A kind of thick steel plates and its manufacturing method |
-
2019
- 2019-12-02 CN CN201911210656.5A patent/CN110904383A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH093604A (en) * | 1995-06-23 | 1997-01-07 | Daido Steel Co Ltd | High speed tool steel for precision casting |
| CN100410555C (en) * | 2006-09-28 | 2008-08-13 | 大连三环复合材料技术开发有限公司 | Stainless steel solid bearing holder and its making method |
| CN103252449A (en) * | 2013-05-08 | 2013-08-21 | 青岛钰鑫车辆工程有限公司 | Production method of composite material stirring wing |
| CN104404387A (en) * | 2014-10-29 | 2015-03-11 | 江苏沙钢集团有限公司 | Steel plate for ultralow-temperature and high-pressure service delivery tubes, and its making method |
| CN104439074A (en) * | 2014-11-27 | 2015-03-25 | 宁波通达精密铸造有限公司 | Fusible mold precision casting method |
| CN110306111A (en) * | 2019-07-17 | 2019-10-08 | 张家港宏昌钢板有限公司 | A kind of thick steel plates and its manufacturing method |
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Application publication date: 20200324 |
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