CN106181231A - GCr15 hydraulic hammer piston production technology - Google Patents
GCr15 hydraulic hammer piston production technology Download PDFInfo
- Publication number
- CN106181231A CN106181231A CN201610532689.1A CN201610532689A CN106181231A CN 106181231 A CN106181231 A CN 106181231A CN 201610532689 A CN201610532689 A CN 201610532689A CN 106181231 A CN106181231 A CN 106181231A
- Authority
- CN
- China
- Prior art keywords
- gcr15
- production technology
- retention time
- temperature
- well formula
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/04—Hardening by cooling below 0 degrees Celsius
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
Abstract
The invention discloses a kind of GCr15 hydraulic hammer piston production technology, include following processing step: select high-quality beating steel GCr15, use vacuum outgas steel ingot, ingot head opening position resection is more than 15%, after steel ingot former portion resection is more than 2%, carries out being forged into circle, forging ratio >=5:1, then carrying out spheroidizing, surface grinding, surface roughness must reach ultrasonic examination requirement: performs by JB/T5000.15 2007 standard, reaches two grades of flaw detections；Present invention employs new material Gcr15/9cr2mo and production technology makes the product of pure production domesticization, substantially increase service life.
Description
Technical field
The present invention relates to hydraulic part field, particularly belong to GCr15 hydraulic hammer piston production technology.
Background technology
Hydraulic breaking hammer is formed by numerous assembling parts, and each part plays vital effect, hydraulic crushing
Hammer piston is after by hydraulic-driven, produces high intensity, and high vibration and a core part of altofrequency impact energy, it is durable
Degree and improve hitting dynamics and be just particularly important, once it is by side force or fall block and deform, and can make in hydraulic breaking hammer
Locking pulled by cylinder body and reversal valve, causes whole hydraulic breaking hammer to be scrapped, the most badly damaged hydraulic pump of excavator.Thus can make
Become huge economic loss and seriously delay normal production.The piston of hydraulic breaking hammer is based on import at present, and use cost is huge
Greatly.
Summary of the invention
It is an object of the invention to provide a kind of GCr15 hydraulic hammer piston production technology, have employed new material Gcr15/
9cr2mo and production technology make the product of pure production domesticization, substantially increase service life.
Technical scheme is as follows:
GCr15 hydraulic hammer piston production technology, includes following processing step:
1), selecting high-quality beating steel GCr15, use vacuum outgas steel ingot, ingot head opening position resection is more than 15%, and steel ingot is former
After portion's resection is more than 2%, carries out being forged into circle, forging ratio >=5:1, then carry out spheroidizing, surface grinding, rough surface
Degree must reach ultrasonic examination requirement: performs by JB/T5000.15-2007 standard, reaches two grades of flaw detections；
2), finishing operation:
After 1-2mm surplus is stayed in the rough turn molding of a, numerically controlled lathe, carry out cold-heat treatment processing；
After b, cold-heat treatment, carry out ultrasonic examination, detect a flaw and reach two grades of flaw detection requirements with reference to JB/T5000.15-2007, and do
Hardness test, case hardness requires that at HRC58-62, core hardness requires at HRC42-44, and qualified rear numerical control carries out finish turning,
Ask and leave 0.3-0.5mm allowance；
3), heat treatment
Workpiece after polish is put into well formula glowing furnace and carries out Quenching Treatment, hardening heat 350-400 DEG C, temperature retention time 3h,
Hardening heat 450-500 DEG C, temperature retention time 7h；Temper, temperature 260 DEG C ± 5 DEG C, insulation is carried out at well formula tempering furnace
Time 20h, then air cooling；
4), bead, cold treatment
Entering cooler bin after piston ball blast, in cooling the temperature inside the box is-140 DEG C, isothermal holding took out after 7 hours.
Described well formula glowing furnace of being put into by workpiece after polish carries out Quenching Treatment, hardening heat 380 DEG C, temperature retention time
3h, hardening heat 480 DEG C, temperature retention time 7h；Temper, temperature 260 DEG C, temperature retention time is carried out at well formula tempering furnace
20h, then air cooling.
Steel ball ball blast of the present invention removes surface oxide layer and burr, increases area density.Cold treatment is effectively improved inside it
Organizational structure, greatly reduces its coefficient of expansion.Have employed new material Gcr15/9cr2mo and production technology is made pure domestic
The product changed, substantially increases service life.
Detailed description of the invention
GCr15 hydraulic hammer piston production technology, includes following processing step:
1), selecting high-quality beating steel GCr15, use vacuum outgas steel ingot, ingot head opening position resection is more than 15%, and steel ingot is former
After portion's resection is more than 2%, carries out being forged into circle, forging ratio >=5:1, then carry out spheroidizing, surface grinding, rough surface
Degree must reach ultrasonic examination requirement: performs by JB/T5000.15-2007 standard, reaches two grades of flaw detections；
2), finishing operation:
After 1-2mm surplus is stayed in the rough turn molding of a, numerically controlled lathe, carry out cold-heat treatment processing；
After b, cold-heat treatment, carry out ultrasonic examination, detect a flaw and reach two grades of flaw detection requirements with reference to JB/T5000.15-2007, and do
Hardness test, case hardness requires that at HRC58-62, core hardness requires at HRC42-44, and qualified rear numerical control carries out finish turning,
Ask and leave 0.3-0.5mm allowance；
3), heat treatment
Workpiece after polish is put into well formula glowing furnace and carries out Quenching Treatment, hardening heat 350-400 DEG C, temperature retention time 3h,
Hardening heat 450-500 DEG C, temperature retention time 7h；Temper, temperature 260 DEG C ± 5 DEG C, insulation is carried out at well formula tempering furnace
Time 20h, then air cooling；
4), bead, cold treatment
Entering cooler bin after piston ball blast, in cooling the temperature inside the box is-140 DEG C, isothermal holding took out after 7 hours.
Described well formula glowing furnace of being put into by workpiece after polish carries out Quenching Treatment, hardening heat 380 DEG C, temperature retention time
3h, hardening heat 480 DEG C, temperature retention time 7h；Temper, temperature 260 DEG C, temperature retention time is carried out at well formula tempering furnace
20h, then air cooling.
GCr15 hydraulic hammer piston performance parameter prepared by embodiments of the invention is as follows:
1, under 80 DEG C of high temperature, modified difference is 0.01mm
2, tensile strength (Mpa) >=980
3, yield strength (Mpa) >=850
4, bending strength (Mpa) >=2300.
Claims (2)
1.GCr15 hydraulic hammer piston production technology, it is characterised in that include following processing step:
1), selecting high-quality beating steel GCr15, use vacuum outgas steel ingot, ingot head opening position resection is more than 15%, and steel ingot is former
After portion's resection is more than 2%, carries out being forged into circle, forging ratio >=5:1, then carry out spheroidizing, surface grinding, rough surface
Degree must reach ultrasonic examination requirement: performs by JB/T5000.15-2007 standard, reaches two grades of flaw detections；
2), finishing operation:
After 1-2mm surplus is stayed in the rough turn molding of a, numerically controlled lathe, carry out cold-heat treatment processing；
After b, cold-heat treatment, carry out ultrasonic examination, detect a flaw and reach two grades of flaw detection requirements with reference to JB/T5000.15-2007, and do
Hardness test, case hardness requires that at HRC58-62, core hardness requires at HRC42-44, and qualified rear numerical control carries out finish turning,
Ask and leave 0.3-0.5mm allowance；
3), heat treatment
Workpiece after polish is put into well formula glowing furnace and carries out Quenching Treatment, hardening heat 350-400 DEG C, temperature retention time 3h,
Hardening heat 450-500 DEG C, temperature retention time 7h；Temper, temperature 260 DEG C ± 5 DEG C, insulation is carried out at well formula tempering furnace
Time 20h, then air cooling；
4), bead, cold treatment
Entering cooler bin after piston ball blast, in cooling the temperature inside the box is-140 DEG C, isothermal holding took out after 7 hours.
GCr15 hydraulic hammer piston production technology the most according to claim 1, it is characterised in that: described by after polish
Workpiece is put into well formula glowing furnace and is carried out Quenching Treatment, hardening heat 380 DEG C, temperature retention time 3h, and hardening heat 480 DEG C, during insulation
Between 7h；Temper, temperature 260 DEG C, temperature retention time 20h, then air cooling is carried out at well formula tempering furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610532689.1A CN106181231A (en) | 2016-07-07 | 2016-07-07 | GCr15 hydraulic hammer piston production technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610532689.1A CN106181231A (en) | 2016-07-07 | 2016-07-07 | GCr15 hydraulic hammer piston production technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106181231A true CN106181231A (en) | 2016-12-07 |
Family
ID=57473478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610532689.1A Pending CN106181231A (en) | 2016-07-07 | 2016-07-07 | GCr15 hydraulic hammer piston production technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106181231A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1962177A (en) * | 2006-12-06 | 2007-05-16 | 国营重庆重型铸锻厂 | Method for making hammer stem for forging equipment |
| CN101574769A (en) * | 2009-05-21 | 2009-11-11 | 天津辰龙重工机械有限公司 | Surface treatment method of piston for quartering hammer |
| CN102796964A (en) * | 2011-10-10 | 2012-11-28 | 江苏力博士机械股份有限公司 | Novel material of piston of breaking hammer and manufacturing process of piston |
-
2016
- 2016-07-07 CN CN201610532689.1A patent/CN106181231A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1962177A (en) * | 2006-12-06 | 2007-05-16 | 国营重庆重型铸锻厂 | Method for making hammer stem for forging equipment |
| CN101574769A (en) * | 2009-05-21 | 2009-11-11 | 天津辰龙重工机械有限公司 | Surface treatment method of piston for quartering hammer |
| CN102796964A (en) * | 2011-10-10 | 2012-11-28 | 江苏力博士机械股份有限公司 | Novel material of piston of breaking hammer and manufacturing process of piston |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161207 |