Processing technology of precipitation hardening type 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

Inactive Publication Date: 2019-05-14
慈溪市帅吉文体用品有限公司
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  • Abstract
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Problems solved by technology

[0005] The invention aims at the problems existing in the above-mentioned prior art, and provides a processing technology for a preci

Method used

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Experimental program
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Embodiment

[0042] Include the following steps:

[0043] 1. Forgings, configure molten steel according to GB1220-2007 "Stainless Steel Rods", 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 ...

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Abstract

The invention relates to a processing technology of a precipitation hardening type stainless steel pump shaft. The processing technology comprises the following steps of piece forging, roughing I, UTinspection, heat treatment, roughing II, high temperature aging, semi-finish turning I, semi-finish turning II, low temperature aging, repairing, finish turning I, grinding I, scribing, milling, grinding II, flaw detection, chrome plating, dehydrogenation treatment, removal of chrome plating protection, grinding III, grinding IV, trimming and finished product obtaining. The processing technology of the pump shaft is small in work hardening effect, small in dimensional deformation, good in pump shaft processing dimensional accuracy and high in surface finish. Finished size inspection is controlled to be 40 DEG C or below; and the processing efficiency is high, the quality is good, the dimensional accuracy and the dimensional and dimensional tolerance deformation of the pump shaft are small,and the dimensional requirements and technical requirements of drawings are met.

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

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Application Information

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IPC IPC(8): B23P15/00
Inventor 孙巧云
Owner 慈溪市帅吉文体用品有限公司
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