表面熱(rè)處理(lǐ)

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2021-01-25

surface heat treatment

表面熱(rè)處理(lǐ)

通(tōng)過對(duì)鋼件(jiàn↓& →)表面的(de)加熱(rè)、冷(lěng)卻而改變表層力學性能(néng)的(de)金(jīn ÷₹©)屬熱(rè)處理(lǐ)工(gōng)藝。表面淬火(huǒ)是(shì)表面熱(rè)處理(l☆♣☆ǐ)的(de)主要(yào)內(nèi)容，其目的(de)是(shì)獲得(d≥Ω$e)高(gāo)硬度的(de)表面層和(hé)有(yφ↑ǒu)利的(de)內(nèi)應力分(fēn)布，以提高(g≤←σ āo)工(gōng)件(jiàn)的(de)耐磨性能≤φ(néng)和(hé)抗疲勞性能(néng)。

對(duì)工(gōng)件(jiàn)表面進行(xíng)強化(huà)的(de)金(jπ‌βīn)屬熱(rè)處理(lǐ)工(gōng) ÷←σ藝。它不(bù)改變零件(jiàn)心部的(de)組織和(hé)性能(néng) 。廣泛用(≠γyòng)于既要(yào)求表層具有(yǒu)高(gāo)的(de)耐磨性、抗疲 ∞×勞強度和(hé)較大(dà)的(de)沖擊載荷，又(yòu)要(yào)求整體(♦←σtǐ)具有(yǒu)良好(hǎo)的(de)塑性和(hé)韌性的(de)零件(ji∞✔γ×àn)，如(rú)曲軸、凸輪軸、傳動齒輪等。表面熱(rè)處理(₽λlǐ)分(fēn)為(wèi)表面淬火(huǒ)和(hé)化(h § uà)學熱(rè)處理(lǐ)兩大(dà)類。

Surface heat treamtne is<∞© by heating the surface of the st'∞eel, cooling and changing the surface mechanic♥₩Ω÷al properties of meta heat treatmen÷&t process. Surface hardeni$γ¶ng is the main content of the su↔↕$ rface heat treatment.It€§s objective is to obtain a high hard♣>ness of the surface layer and favorable sδ÷tress distribution, in order ÷±β∑to improve the wear resistanc ε™<e and fatigue properties of the workpiece.

It is metal heat treatment process,to enhanc✔™$e work piece surface. It does not change thε$δe organization and performance of the work piec $×e heart section.. It is widely used iγδn work pices , both surface requi♦Ωα♥res a high wear resis£₽tance, fatigue stren☆‌ gth and a larger impact load, but also re©☆₽quires a whole has good ductility α&and toughness, such as λ÷ crankshafts, camshafts, transmission gears.

Surface heat treatment is div<₹ided into two categories: surface harφλdening and chemical trea↔tment