Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Machining process of precipitation hardening stainless steel pump shaft

A precipitation-hardening, stainless steel pump technology, applied in the field of pump shaft processing technology, can solve the problems of easy fracture and failure of the pump shaft, achieve stable size, eliminate processing stress, and ensure dimensional accuracy

Active Publication Date: 2016-11-16
SHENYANG SANKE HYDRAULIC MACHINERY MANUFACTORY
View PDF7 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problems existing in the above-mentioned prior art, and provides a processing technology of precipitation-hardening stainless steel pump shaft, which solves the problem that the pump shaft is easy to break and fail in the prior art

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0042] Include the following steps:

[0043] 1. Forgings, configure molten steel according to GB1220-2007 "Stainless Steel Bars", forge steel ingots, and forge blanks after secondary remelting;

[0044] 2. Rough turning I: Support the above-mentioned blank with a center frame, clamp one end of the shaft, turn the end face of the stuck end flat, punch the blank with a center hole, the outer circle of the center hole has a unilateral allowance of 3-4mm, and the surface roughness is Ra6.3um ;

[0045] 3. UT inspection: Ultrasonic inspection is carried out on the workpiece after the above rough car I, according to the JB / T4730 standard;

[0046] 4. Heat treatment: The workpiece after the above UT inspection is subjected to solution treatment at 1040±10°C, water quenched, and the test block is in the same furnace;

[0047] 5. Rough turning II: clamp the workpiece after the above heat treatment to the other end, support the workpiece with the center frame, flatten the end face of ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a machining process of a precipitation hardening stainless steel pump shaft. The machining process comprises the steps of: forging, rough turning I, UT inspection, heat treatment, rough turning II, high-temperature aging, semi-finish turning I, semi-finish turning II, low-temperature aging, grinding, finish turning I, polishing I, lineation, milling, polishing II, flaw detection, chromium plating, hydrogen removing treatment, chromium plating protection removal, polishing III, polishing IV, finishing, and obtaining of a finished product. The pump shaft machining process is low in hardening effect and size deformation, excellent in pump shaft machining size precision and high in surface smoothness, controls the size inspection below 40 DEG C after machining, is high in machining efficiency and quality, can guarantee the pump shaft size precision and low shape and position size tolerance deformation, and satisfies the drawing size requirements and the technical requirements.

Description

technical field [0001] The invention relates to a processing technology of a pump shaft, in particular to a processing technology of a precipitation-hardened stainless steel pump shaft. Background technique [0002] 0Cr17Ni4Cu4Nb is a typical martensitic precipitation-hardening stainless steel. Its nickel content is low, and its martensite transformation temperature is higher than room temperature. After cooling to room temperature through solid solution temperature, its structure transforms into martensite, and then undergoes aging treatment. The copper phase is precipitated in the martensite matrix, which further improves the strength. Due to the low carbon content, the steel has good machinability in solid solution state, and its corrosion and weldability are better than those of martensitic stainless steel. [0003] 0Cr17Ni4Cu4Nb has good corrosion resistance and high temperature oxidation resistance, and has excellent high temperature resistance mechanical properties b...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/14
CPCB23P15/14
Inventor 梁猛王平久张皙瑶顾世平
Owner SHENYANG SANKE HYDRAULIC MACHINERY MANUFACTORY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com