摘要
沉淀硬化不锈钢是含铝、钛、铌和铜等沉淀硬化元素的铁-镍-铬合金。沉淀硬化过程包括非常细小的金属间相的形成(析出),如Laves相Fe_2(Mo,Nb),Ni_3M(M:Al,Ti,Nb,Cu,V,Mo,W),Nb(C,N)和碳氮化物Ti(C,N)及碳化物Fe_3Nb_3C(M_6C)。本文对沉淀硬化钢进行了渗硼处理,为了提高硬度和耐磨性,该钢以铌作硬化剂。钢的成分为0.03C-0.22Si-17.86Cr-3.91Ni-2.14Mo-1.96Nb(质量分数,%)。渗硼在添加10%Al的熔融硼砂中进行,温度1 100℃,时间4 h,油冷,随后于500℃时效。结果获得了硬度高、耐磨性好的硼化物层。
Precipitation-hardening stainless steels are iron-nickel-chromium alloys containing precipitation hardening elements such as aluminum, titanium, niobium and copper. The precipitation hardening process involves the formation （precipitation） of very fine intermetallic phases such as Laves phases-Fe2（Mo,Nb） ; Ni3M （M： A1, Ti, Nb, Cu, V, Mo, W）; Nb（C,N） and Ti（C,N） （carbonitride） and Fe3Nb3C （M6C carbides）. In this work, boriding treatment was performed on a precipitation hardening steel, developed by us using niobium as a formative element of precipitated hardeners to increase hardness and wear resistance. The steel sample composition was 0.03C-0.22Si-17.86Cr-3.91Ni-2.14Mo-1.96Nb （ in wt% ）. The boriding treatment was conducted in a molten borax bath with the addition of 10% aluminum at 1 100 ℃ for 4 hours. The cooling was performed in oil and the samples were subsequently aged at 500 ℃. Boride layers with high hardness and resistance to wear were obtained.
出处
《热处理》
CAS
2016年第4期42-46,共5页
Heat Treatment
关键词
不锈钢
沉淀硬化
渗硼
黏着磨损
stainless steels
precipitation-hardening
boriding
adhesive wear
