CN107803632A - The processing technology of PH stainless steel pump shaft - Google Patents
The processing technology of PH stainless steel pump shaft Download PDFInfo
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- CN107803632A CN107803632A CN201711049635.0A CN201711049635A CN107803632A CN 107803632 A CN107803632 A CN 107803632A CN 201711049635 A CN201711049635 A CN 201711049635A CN 107803632 A CN107803632 A CN 107803632A
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- chromium plating
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- pump shaft
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- 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
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- Electroplating Methods And Accessories (AREA)
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Abstract
The present invention relates to a kind of processing technology of PH stainless steel pump shaft, it comprises the steps：Forging, rough turn I, UT inspection, heat treatment, rough turn II, high-temperature aging, half smart car I, half smart car II, low temperature aging, repair grind, smart car I, mill I, line, milling, mill II, flaw detection, chromium plating, dehydrogenation, remove chromium plating protection, mill III, mill IV, finishing, obtain finished product.Pump shaft processing technology of the present invention, work-hardening effect is small, and size distortion is small, and pump shaft accurate to dimension is good, and surface smoothness is high.Finish size inspection is controlled below 40 DEG C；And high in machining efficiency, quality is good, it can guarantee that the dimensional accuracy of pump shaft and the deformation of morpheme size tolerance are small, meet the requirement of drawing size and technical requirements.
Description
Technical field
The present invention relates to a kind of pump shaft processing technology, more particularly to a kind of processing work of PH stainless steel pump shaft
Skill.
Background technology
0Cr17Ni4Cu4Nb is a kind of typical martensitic precipitation hardening type stainless steel, and its nickel content is relatively low, and martensite turns
Temperature is higher than room temperature, is cooled to room temperature through solid solubility temperature, and its structural transformation is martensite, then through Ageing Treatment, martensitic matrix
In just separate out copper phase, intensity is further improved.Because phosphorus content is relatively low, the steel has good machining under solid solution condition
Performance, its corrosivity and solderability are better than martensitic stain less steel.
0Cr17Ni4Cu4Nb corrosion resistances and high temperature oxidation stability are good, and have excellent high temperature resistant below 400 DEG C
Mechanical property, therefore being usually used in making less than 370 DEG C of parts and requirement has corrosion resistance, wearability, high intensity and high rigidity
Parts and equipment.
But when making pump shaft with this kind of material, because material intensity itself is high, good corrosion resistance, but plasticity is poor, and it is particularly hot
Deal with improperly, long-term use has brittle tendency, is also easy to produce fatigue, causes axle fracture to fail.If simultaneously at pump shaft keyway in the presence of
Small slag inclusion or crackle, through long-term operating, axle is also easy to produce fatigue, and crackle is gradually increased, and causes axle to fail.
The content of the invention
Invention is directed to above-mentioned problems of the prior art, there is provided a kind of processing of PH stainless steel pump shaft
Technique, solves the problems, such as pump shaft easy fracture failure in the prior art.
Technical scheme comprises the steps：
1st, forging, by GB1220-2007《Stainless steel bar》Standard configuration molten steel, forging steel ingot, by secondary remelting forging
Blank；
2nd, rough turn I：Above-mentioned blank is supported with centre frame, blocks axle one end, the end face at the flat end that is stuck of car, blank hits
Heart hole, centre bore cylindrical unilateral allowance 3-4mm, surface roughness Ra 6.3um；
3rd, UT is examined：Ultrasonic inspection is carried out to the workpiece after above-mentioned rough turn I, performed by JB/T4730 standards；
4th, it is heat-treated：Workpiece after above-mentioned UT is examined carries out 1040 ± 10 DEG C of solutionizing processing, water quenching, the same stove of test block；
5th, rough turn II：By the workpiece card other end after above-mentioned heat treatment, workpiece, the flat end end that is stuck of car are supported with centre frame
Face, centering, turning unilateral allowance 1.5-2mm, each shoulder axial direction allowance 1mm, roughness Ra 6.3um；
6th, high-temperature aging：Workpiece after above-mentioned rough turn II is subjected to high-temperature aging processing, internal stress is eliminated, at high-temperature aging
Manage bar part is：+ 580 ± 10 DEG C, 4h, air cooling；
7th, half smart car I：The workpiece that above-mentioned high-temperature aging is treated, one end is blocked, push up the other end, middle centre frame branch
Support, on request size turning, threaded circular, cylindrical, threaded circular radial direction allowance 0.6-0.7mm, ride shoulder, undercut, shoulder, sky
Cutter groove axially presses nominal size allowance 0.4-0.5mm；
8th, half smart car II：Turn around, repeat process 7；
9th, low temperature aging：Workpiece after above-mentioned half smart car II is subjected to low temperature aging processing, eliminates internal stress, low temperature aging
Treatment conditions are：350 DEG C ± 10,4h, air cooling；
10th, repair and grind：By drawing machining center hole；
11st, smart car I：By the above-mentioned workpiece repaiied after grinding, car goes out screw thread and escape by drawing, there is Geometrical Tolerance Principle
End face allowance 0.2mm；
12nd, I is ground：It is cylindrical at keyway to press nominal size allowance 0.2mm by the workpiece cylindrical grinding after above-mentioned smart car I；
13rd, rule：Workpiece after above-mentioned mill I is rule in keyway position；
14th, milling：By the keyseat by drawing of the workpiece after above-mentioned line；
15th, II is ground：Workpiece after above-mentioned milling is milled to size before chromium plating；
16th, PT is examined：Workpiece after above-mentioned mill II is subjected to liquid penetration test；
17th, chromium plating：Workpiece after above-mentioned flaw detection is subjected to chromium plating, ensures finished product chromium coating thickness 0.05-0.08mm, chromium plating
When will be protected at screw thread, escape；
18th, dehydrogenation：Workpiece after above-mentioned chromium plating is subjected to low temperature dehydrogenation；
19th, chromium plating protection is removed, centre bore is repaiied, to axle bounce≤0.05mm；
20th, III is ground：Workpiece after above-mentioned reparation is milled to size after chromium plating；
21st, IV is ground：Workpiece after above-mentioned mill III is continued to refine, is milled to chromium plating surface roughness Ra1.6um, has morpheme public
Difference require end face, with the cylindrical of keyway, be milled to drawing requirement；
22nd, repair：Workpiece after above-mentioned mill IV is removed into machined burrs, cleaning, marking, obtains finished product.
Also include alignment procedure：Workpiece after above-mentioned half smart car II is straightened if any bent portion.
Also include protection step：Keyway, undercut, shaft extension, threaded portion are carried out into chromium plating safeguard procedures before chromium plating.
In the step 1, it is 6t electroslag furnaces to forge forging equipment in step.
In the step 4, heat-treatment furnace is φ 1.8m × 8m shaft furnaces.
Lathe used is in described step 2, step 5, step 7, step 8, step 11：Workpiece rotational frequency 130r/min,
Tool in Cutting depth 0.2mm, tool feeding 0.3mm/prn；Cutter：YG8 sharp knives or 75 ° of alloy cutters, the rough turn 40- of the depth of cut
50mm/ turns, and half smart car 30mm/ turns, and smart car 5-10mm/ turns.
In described step 12, step 15, step 20, step 21, grinder wheel is white fused alumina emery wheel, rotating speed 50-60r/
min。
Advantages of the present invention effect is as follows：
1st, the solutionizing of pump shaft blank is handled, and ensures the chemical composition and mechanical property of material；
2nd, pump shaft high-temperature aging and low temperature aging processing, it is ensured that eliminate machining stress, stable dimensions, ensure the chi after processing
Very little precision；
3rd, pump shaft Non-Destructive Testing, it is ensured that pump shaft zero defect.
In a word, the pump shaft processing technology, work-hardening effect is small, and size distortion is small, and pump shaft accurate to dimension is good, surface
It is highly polished.Finish size inspection is controlled below 40 DEG C；And high in machining efficiency, quality is good, the size essence of pump shaft can guarantee that
Degree and the deformation of morpheme size tolerance are small, meet the requirement of drawing size and technical requirements.
Embodiment
The present invention technical solution of the present invention is described in detail as follows by specific embodiment.
Embodiment
Comprise the steps：
1st, forging, by GB1220-2007《Stainless steel bar》Standard configuration molten steel, forging steel ingot, by secondary remelting forging
Blank；
2nd, rough turn I：Above-mentioned blank is supported with centre frame, blocks axle one end, the end face at the flat end that is stuck of car, blank hits
Heart hole, centre bore cylindrical unilateral allowance 3-4mm, surface roughness Ra 6.3um；
3rd, UT is examined：Ultrasonic inspection is carried out to the workpiece after above-mentioned rough turn I, performed by JB/T4730 standards；
4th, it is heat-treated：Workpiece after above-mentioned UT is examined carries out 1040 ± 10 DEG C of solutionizing processing, water quenching, the same stove of test block；
5th, rough turn II：By the workpiece card other end after above-mentioned heat treatment, workpiece is supported with centre frame, car is flat to be lived end end
Face, centering, turning unilateral allowance 1.5-2mm, each shoulder axial direction allowance 1mm, roughness Ra 6.3um；
6th, high-temperature aging：Workpiece after above-mentioned rough turn II is subjected to high-temperature aging processing, internal stress is eliminated, at high-temperature aging
Manage bar part is：+ 580 ± 10 DEG C, 4h, air cooling；
7th, half smart car I：The workpiece that above-mentioned high-temperature aging is treated, card one end, push up the other end, middle centre frame branch
Support, on request size turning, threaded circular, cylindrical, threaded circular radial direction allowance 0.6-0.7mm, ride shoulder, undercut, shoulder, sky
Cutter groove axially presses nominal size allowance 0.4-0.5mm；
8th, half smart car II：Turn around, repeat process 7；
9th, low temperature aging：Workpiece after above-mentioned half smart car II is subjected to low temperature aging processing, eliminates internal stress, low temperature aging
Treatment conditions are：350 DEG C ± 10,4h, air cooling；
10th, repair and grind：By drawing machining center hole；
11st, smart car I：By the above-mentioned workpiece repaiied after grinding, car goes out screw thread and escape by drawing, there is Geometrical Tolerance Principle
End face allowance 0.2mm；
12nd, I is ground：It is cylindrical at keyway to press nominal size allowance 0.2mm by the workpiece cylindrical grinding after above-mentioned smart car I；
13rd, rule：Workpiece after above-mentioned mill I is rule in keyway position；
14th, milling：By the keyseat by drawing of the workpiece after above-mentioned line；
15th, II is ground：Workpiece after above-mentioned milling is milled to size before chromium plating；
16th, PT is examined：Workpiece after above-mentioned mill II is subjected to liquid penetration test；
17th, chromium plating：Workpiece after above-mentioned flaw detection is subjected to chromium plating, ensures finished product chromium coating thickness 0.05-0.08mm, chromium plating
When will be protected at screw thread, escape；
18th, dehydrogenation：Workpiece after above-mentioned chromium plating is subjected to low temperature dehydrogenation；
19th, chromium plating protection is removed, centre bore is repaiied, to axle bounce≤0.05mm；
20th, III is ground：Workpiece after above-mentioned reparation is milled to size after chromium plating；
21st, IV is ground：Workpiece after above-mentioned mill III is continued to refine, is milled to chromium plating surface roughness Ra1.6um, has morpheme public
Difference require end face, with the cylindrical of keyway, be milled to drawing requirement；
22nd, repair：Workpiece after above-mentioned mill IV is removed into machined burrs, cleaning, marking, obtains finished product.
Also include alignment procedure：Workpiece after above-mentioned half smart car II is straightened if any bent portion.
Also include protection step：Keyway, undercut, shaft extension, threaded portion are carried out into chromium plating safeguard procedures before chromium plating.
Claims (3)
1. a kind of processing technology of PH stainless steel pump shaft, it is characterised in that comprise the steps：Step 1, forging, are pressed
GB1220-2007《Stainless steel bar》Standard configuration molten steel, forging steel ingot, by secondary remelting forged blank；Step 2, rough turn I：
Above-mentioned blank is supported with centre frame, blocks axle one end, the end face at the flat end that is stuck of car, blank centering, centre bore is cylindrical
Unilateral allowance 3-4mm, surface roughness Ra 6.3um；Step 3, UT are examined：Ultrasonic wave inspection is carried out to the workpiece after above-mentioned rough turn I
Test, performed by JB/T4730 standards；Step 4, heat treatment：Workpiece after above-mentioned UT is examined is carried out at 1040 ± 10 DEG C of solutionizing
Reason, water quenching, the same stove of test block；Step 5, rough turn II：By the workpiece card other end after above-mentioned heat treatment, workpiece is supported with centre frame,
The flat end end face that is stuck of car, centering, turning unilateral allowance 1.5-2mm, each shoulder axial direction allowance 1mm, roughness
Ra6.3um；Step 6, high-temperature aging：Workpiece after above-mentioned rough turn II is subjected to high-temperature aging processing, internal stress is eliminated, during high temperature
Imitating treatment conditions is：+ 580 ± 10 DEG C, 4h, air cooling；Step 7, half smart car I：The workpiece that above-mentioned high-temperature aging is treated, is blocked
One end, push up the other end, centre center rest support, on request size turning, threaded circular, cylindrical, threaded circular radial direction allowance
0.6-0.7mm, ride shoulder, undercut, shoulder, undercut axially press nominal size allowance 0.4-0.5mm；Step 8, half smart car
II：Turn around, repeat process 7；Step 9, low temperature aging：Workpiece after above-mentioned half smart car II is subjected to low temperature aging processing, eliminated
Internal stress, low temperature aging treatment conditions are：350 DEG C ± 10,4h, air cooling；Step 10, repair and grind：By drawing machining center hole；Step
11st, smart car I：By the above-mentioned workpiece repaiied after grinding, car goes out screw thread and escape by drawing, and the end face for having Geometrical Tolerance Principle is stayed
Measure 0.2mm；Step 12, mill I：It is cylindrical at keyway to press nominal size allowance 0.2mm by the workpiece cylindrical grinding after above-mentioned smart car I；Step
Rapid 13, rule：Workpiece after above-mentioned mill I is rule in keyway position；Step 14, milling：Workpiece after above-mentioned line is pressed into drawing
It is required that keyseat；Step 15, mill II：Workpiece after above-mentioned milling is milled to size before chromium plating；Step 16, PT are examined：By above-mentioned mill
Workpiece after II carries out liquid penetration test；Step 17, chromium plating：Workpiece after above-mentioned flaw detection is subjected to chromium plating, ensures finished product plating
Layers of chrome thickness 0.05-0.08mm, it will be protected at screw thread, escape during chromium plating；Step 18, dehydrogenation：By above-mentioned chromium plating
Workpiece carries out low temperature dehydrogenation afterwards；Step 19, chromium plating protection is removed, centre bore is repaiied, to axle bounce≤0.05mm；Step 20,
Grind III：Workpiece after above-mentioned reparation is milled to size after chromium plating；Step 21, mill IV：Workpiece after above-mentioned mill III is continued into essence
Mill, is milled to chromium plating surface roughness Ra1.6um, has the end face of Geometrical Tolerance Principle, with the cylindrical of keyway, be milled to drawing requirement；
Step 22, finishing：Workpiece after above-mentioned mill IV is removed into machined burrs, cleaning, marking, obtains finished product.
2. the processing technology of a kind of PH stainless steel pump shaft according to claim 1, it is characterised in that also include
Alignment procedure：Workpiece after above-mentioned half smart car II is straightened if any bent portion.
3. the processing technology of a kind of PH stainless steel pump shaft according to claim 1, it is characterised in that also include
Protect step：Keyway, undercut, shaft extension, threaded portion are carried out into chromium plating safeguard procedures before chromium plating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711049635.0A CN107803632A (en) | 2017-10-31 | 2017-10-31 | The processing technology of PH stainless steel pump shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711049635.0A CN107803632A (en) | 2017-10-31 | 2017-10-31 | The processing technology of PH stainless steel pump shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107803632A true CN107803632A (en) | 2018-03-16 |
Family
ID=61583169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711049635.0A Pending CN107803632A (en) | 2017-10-31 | 2017-10-31 | The processing technology of PH stainless steel pump shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107803632A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111633392A (en) * | 2020-07-17 | 2020-09-08 | 常州今创风挡系统有限公司 | Manufacturing process of connecting frame |
| CN115255810A (en) * | 2022-04-28 | 2022-11-01 | 三河建华高科有限责任公司 | Processing technique method of current collecting disc in CMP equipment |
-
2017
- 2017-10-31 CN CN201711049635.0A patent/CN107803632A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111633392A (en) * | 2020-07-17 | 2020-09-08 | 常州今创风挡系统有限公司 | Manufacturing process of connecting frame |
| CN111633392B (en) * | 2020-07-17 | 2023-12-29 | 常州今创风挡系统有限公司 | Manufacturing process of connecting frame |
| CN115255810A (en) * | 2022-04-28 | 2022-11-01 | 三河建华高科有限责任公司 | Processing technique method of current collecting disc in CMP equipment |
| CN115255810B (en) * | 2022-04-28 | 2024-05-14 | 三河建华高科有限责任公司 | Processing technique of current collecting disc in CMP equipment |
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Application publication date: 20180316 |