Dalilan da yasa taurin shigar da taurare sassan ba su cika buƙatun fasaha ba

1. Yanayin zafin jiki bai isa ba

Wato, dumama bai isa ba kuma ba a kai ga abin da ake buƙata na zafin jiki ba. Don matsakaicin tsarin ƙarfe na carbon, akwai ferrite da ba a narkar da shi a cikin austenite, kuma akwai ferrite da ba a narkar da shi ba a cikin tsarin da aka kashe sai dai ga martensite, kuma saman da aka kashe na workpiece galibi shuɗi ne. Hakanan za’a iya gani daga bayyanar ɓangarorin induction masu taurare cewa saman da aka kashe na yau da kullun shine beige, kuma saman mai zafi fari ne.

2. Rashin isasshen sanyaya

Wato, ƙimar sanyaya ƙasa da ƙimar sanyaya mai mahimmanci. A cikin tsarin da aka kashe, ban da wani ɓangare na martensite, akwai kuma tortenite, kuma mafi girman adadin tortenite, ƙananan taurin. Yana faruwa sau da yawa a lokacin da maida hankali na quenching matsakaici, zazzabi, matsa lamba canje-canje da kuma ruwa allura rami da aka toshe.

3. Yanayin zafin kai ya yi yawa

Matsalar zafin zafin jiki mai girman gaske yana faruwa a cikin quenching na shaft, wanda gabaɗaya yana faruwa a lokacin da ke kwance a kwance ko kuma a tsaye quenching. Lokacin da faɗin jet ɗin ruwa ya yi gajere, yanayin dumama da sauri ya wuce jet ɗin ruwa kuma baya sanyaya sashin quenching sosai, kuma ruwan yana toshe matakan matakan (babban ɓangaren diamita yana saman, ƙaramin diamita sashin yana kan ƙasa), kuma ɓangaren da aka kashe ba zai iya ci gaba da sanyaya ba. Sakamakon haka, ana yawan ganin yanayin zafi mai zafin kai da kuma gano a saman da ya mutu.

4. Tabo mai laushi ko karkace baki

Lallausan tabo da tubalan da ke kan saman da aka kashe galibi baƙar fata ne, kuma bel ɗin baƙar fata na karkace al’ada ce ta gama gari na bincikar sassan da aka kashe. Wannan baƙar fata kuma ana kiranta da band mai laushi, kuma galibi tsarin tortite ne. Magani shine a fesa ruwa daidai gwargwado, kuma ƙara saurin jujjuyawar aikin aikin shima zai iya rage girman bel ɗin baƙar fata, amma mafi mahimmanci shine tsarin feshin ruwa ya kamata ya sanya yanayin dumama yayi sanyi daidai. Rufe ramukan jet sau da yawa suna ɗaya daga cikin abubuwan da ke haifar da tabo mai laushi.

5. Tasirin abubuwan sinadaran abun ciki

Rage abubuwan da ke tattare da abubuwa, musamman abubuwan da ke cikin carbon, yana ɗaya daga cikin abubuwan da ke rage taurin. Idan ya cancanta, za a iya amfani da abun ciki na carbon da aka zaɓa don mahimman sassa, ta yadda babba da ƙananan iyaka na w (C) za a iya ƙunsar zuwa cikin 0.05%.

6. Maganin zafi na shiri

Canje-canje a cikin quenching da tempering tsari, da kuma baki fata na birgima abu ya rage a kan quenching surface ne kuma dalilan da ya sa taurin shigar da taurare sassa ba ya saduwa da fasaha bukatun.

7. Surface decarburization da decarbonization

Sau da yawa yana faruwa a saman kayan da aka zana sanyi. Saboda haka, bayan quenching wadannan sanduna, waje Layer za a iya kasa da 0.5mm kafin taurin. Idan taurin saman ya yi ƙasa kaɗan, taurin Layer na ciki ya fi saman ƙasa, yana nuna cewa akwai ƙarancin carbon-depleted ko decarburized Layer. (banda na musamman geometries kamar cam lobes, gear saman).

8. Ribbon tsoho nama

Tsarin banded ɗin a cikin ainihin tsarin ɓangaren da aka kashe zai haifar da rashin isasshen ƙarfi bayan quenching. Akwai ferrite da ba a narkar da shi ba a cikin tsarin banded, wanda ba za a iya narkar da shi yayin aiwatar da haɓakawa ba, kuma taurin bayan quenching dole ne ya gaza, kuma tsarin banded yana da wahala a kawar da shi ko da an ƙara yawan zafin jiki.