Muffle furnace heat treatment operation process

Lub muffle furnace kho cua sov rauv yog ib tug txheej txheem nyob rau hauv uas cov ntaub ntawv yog rhuab, insulated thiab txias nyob rau hauv ib tug tej yam nruab nrab, thiab lawv cov kev ua tau zoo yog tswj los ntawm kev hloov cov nto los yog sab hauv cov khoom.

Cov txheej txheem txheej txheem ntawm muffle furnace:

1: Muffle furnace annealing: yog hais txog cov txheej txheem kev kho cua sov uas cov ntaub ntawv hlau tau rhuab mus rau qhov kub thiab txias, khaws cia rau qee lub sijhawm, thiab tom qab ntawd maj mam txias. Cov txheej txheem annealing feem ntau yog: recrystallization annealing, kev nyuaj siab annealing, spheroidizing annealing, tiav annealing thiab lwm yam. Lub hom phiaj ntawm annealing: feem ntau yog kom txo cov hardness ntawm cov ntaub ntawv hlau, txhim kho plasticity, kom yooj yim txiav los yog siab ua, kom txo tau cov residual kev nyuaj siab, los txhim kho lub uniformity ntawm cov qauv thiab muaj pes tsawg leeg, los yog npaj rau kev kho cua sov tom ntej.

2: Muffle furnace normalizing: yog hais txog cov txheej txheem ntawm cov cua sov hlau los yog hlau qhov chaw saum toj no lossis (lub ntsiab lus tseem ceeb ntawm cov hlau), ua kom nws ntawm 30 ~ 50 ℃ rau lub sijhawm tsim nyog, thiab tom qab ntawd txias nws hauv huab cua. Lub hom phiaj ntawm normalizing yog los txhim kho cov cuab yeej ntawm cov hlau tsis muaj carbon tsawg, txhim kho machinability, refine nplej, tshem tawm cov yam ntxwv tsis xws luag, thiab npaj rau kev kho cua sov tom ntej.

3: Muffle furnace quenching: hais txog cua sov cov hlau mus rau qhov kub siab tshaj Ac3 los yog Ac1 (qhov kub ntawm qhov kub ntawm cov hlau), khaws cia rau ib lub sijhawm, thiab tom qab ntawd tau txais martensite (lossis bainite) ntawm qhov tsim nyog txias. ) Cov txheej txheem kev kho cua sov ntawm lub koom haum. Cov txheej txheem quenching muaj xws li ntsev da dej quenching, martensite graded quenching, bainite austempering, nto quenching thiab ib nrab quenching. Lub hom phiaj ntawm quenching: kom tau txais cov qauv martensite ntawm cov hlau, txhim kho hardness, lub zog thiab hnav tsis kam ntawm lub workpiece, thiab npaj cov qauv rau kev kho cua sov tom ntej.

4: Muffle furnace tempering: refers to the heat treatment process in which steel parts are quenched and then heated to a certain temperature below, kept for a certain period of time, and then cooled to room temperature. Common tempering processes are: low temperature tempering, medium temperature tempering, high temperature tempering and multiple tempering. The purpose of tempering: mainly to eliminate the stress generated by the steel during quenching, so that the steel has high hardness and wear resistance, and has the required plasticity and toughness.