發(fā)布時(shí)間：2018-03-17 01:17

  本文選題：9310鋼　切入點(diǎn)：滲碳　出處：《哈爾濱理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：本文利用可控氣氛雙室爐對9310鋼試樣在不同滲碳溫度下進(jìn)行滲碳實(shí)驗(yàn),研究9310鋼材料滲層、剝層碳濃度、殘余奧氏體含量等變化規(guī)律,通過分析滲碳后的金相組織,滲碳溫度和滲碳時(shí)間對深層深度的影響,碳勢對剝層碳濃度的影響以及殘余奧氏體含量與冰冷處理的關(guān)系,最終確定了9310滲碳鋼熱處理滲碳淬火的最佳工藝參數(shù),從而為實(shí)際生產(chǎn)提供理論指導(dǎo)。本實(shí)驗(yàn)所用的9310鋼在其他工藝參數(shù)不變的情況下,經(jīng)過900℃、910℃、927℃三個(gè)溫度滲碳保溫后,可以從金相組織圖中看到隨著溫度的升高,其滲碳層的組織變化也越來越顯著,且HRC60深度及硬度隨著溫度的升高而增加,滲層深度隨著滲碳溫度的提高不斷加深,不同的滲碳溫度下的殘余奧氏體量均小于10%,長時(shí)間(至少4小時(shí))的深冷處理才可以使殘余奧氏體的含量達(dá)到標(biāo)準(zhǔn)(小于10%),溫度對其影響并不是很明顯。隨著滲碳溫度的升高,滲碳層中碳濃度升高,含碳量明顯增加。當(dāng)采用不同滲碳溫度進(jìn)行滲碳,在0.2 mm剝層碳濃度梯度最高,0.2 mm處反應(yīng)為真實(shí)的碳濃度梯度,即波層碳濃度較高。本文還研究了9310鋼的齒形參數(shù)對滲層深度的影響,研究結(jié)果表明:在900℃、910℃、927℃三個(gè)溫度滲碳保溫后,9310鋼心部組織不受滲碳溫度的影響,齒頂滲層都存在超差現(xiàn)象,齒頂滲層深度與齒高中部的滲層深度存在對應(yīng)關(guān)系,最后得出齒寬m與過滲相關(guān)距離H存在三種對應(yīng)關(guān)系:(1)當(dāng)m=2H·ctgθ時(shí),齒頂剛好達(dá)到過滲點(diǎn);(2)當(dāng)m㧐2H·ctg(?)時(shí),齒頂不存在過滲現(xiàn)象;(3)當(dāng)m＜2H·ctgθ時(shí),齒頂發(fā)生過滲現(xiàn)象。
[Abstract]:In this paper, the Carburizing experiments of 9310 steel samples at different Carburizing temperatures were carried out by means of a controlled atmosphere double chamber furnace. The changes of the layer, the carbon concentration and the residual austenite content of the 9310 steel material were studied. The microstructure of the steel after Carburizing was analyzed. The effects of Carburizing temperature, Carburizing time on the deep depth, the effect of carbon potential on the denudation carbon concentration, and the relationship between the residual austenite content and the cold treatment, the optimum technological parameters for heat treatment and quenching of 9310 Carburized steel were determined. So as to provide theoretical guidance for practical production. The 9310 steel used in this experiment has been carburized at 900 鈩，

本文編號：1622514