常用的钣金材料（Commonly ud sheet metal material）Common sheet metal material
I. galvanized steel
Galvanized steel mainly in two categories:老式录音机
1. Electro galvanized sheet (EG) 2, hot dip galvanized sheet (GI).
Table 1: comparison of galvanized sheet with hot dip galvanized sheet
Galvanized sheet
(EG/SECC) hot dip galvanized plate
我的长沙(GI)
Ba metal, cold rolled annealed steel plate, cold rolled hard steel plate
Pretreatment; electroplating; hot plating
It is difficult to plating zinc and difficult to plating
Zinc coating on the surface of the coating is of steel. The surface is smooth, without zinc, the zinc layer is solidified, and the zinc flower or zinc free flower can be ud
The coating is pure zinc, the outer layer is pure zinc, and the
inner layer is iron zinc alloy
The mechanical properties and the same motherboard after annealing, a hardening of soft material;
The processing performance is similar to that of ba metal. The formability is good, it can withstand simple processing and complex processing can not be competent
The material thickness is common and the material thickness is 0.6~1.5mm愚公移山的精神
The corrosion resistance of the coating is thin, poor thick coating, good can Jianai fingerprint coating
The price is cheap
Two. Stainless steel
Stainless acid resisting steel, which is corrosive to atmosphere, acid, alkali, salt and other medium.
To achieve stainless steel corrosion resistance, chromium (Cr) amount of not less than 13%; in addition, can be added nickel (Ni) or molybdenum (Mo), etc. to increa the effect. As alloy species
There are many kinds and different contents.
什么疾什么快Stainless steel features: good corrosion resistance, good brightness, high strength, certain elasticity, expensive.
Characteristics of stainless steel:
1, ferritic stainless steel: its high Cr content, with good and high temperature oxidation resistance.
2, austenitic stainless steel: typical brands such as /Cr18Ni9, /Cr18Ni9T1, no magnetism, good corrosion resistance, temperature strength and high temperature oxidation resistance, good plasticity, good toughness, and excellent weldability, notch effect, so it is widely ud. The steel is generally not high strength, low yield strength, and can not be strengthened by heat treatment, but after cold pressing, it can make the tensile strength higher and improve its elasticity, but it can be easily obtained by cold drawing at high temperature. Not suitable for high load.
3, martensitic stainless steel:
Typical such as 2Cr13, GX-8, with magnetism, good shock resistance, good thermal conductivity, high strength and yield limit, good comprehensive mechanical properties after heat treatment strengthening. With more carbon content, after welding need to be back to deal with, in order to eliminate stress, high temperature cooling, easy to form 8 body, so after forging to slow cold, and should immediately temper. Mainly for load-bearing parts.
Cas:
10Cr18Ni9 it is a kind of austenitic stainless steel, can not
写人物作文
only eliminate the quenching hardening, and obtain the good corrosion resistance of cold hardening, quenching in water is a must, to ensure that the best corrosion resistance; antioxidant stability at 900 DEG C. Suitable for all kinds of welding methods; have the tendency of intercrystalline corrosion, intergranular corrosion may suffer damage to the parts in the corrosive medium, water and steam in the medium term; steel after quenching cold deformation, high plasticity, good ductility, but poor cutting quality.
1Cr18Ni9 it is 18-8 type austenitic stainless steel standard, quenching can fry strengthening, but it has good corrosion resistance and cold plastic deformation properties; steel due to plasticity and tou
ghness is high, is suitable for various cutting; welding method; the carbon content of 0Cr18ni9 steel is high, the grain boundary corrosion nsitivity than after welding heat treatment is required, generally should not be welded corrosion; 850 degrees below the air medium and 750 DEG C aviation fuel combustion products of the atmosphere Kenya has stable oxidation resistance.
It is a Cr13Ni4Mn9 austenitic stainless steel, quenched steel not strengthened, plastic is very high in the hardened state, can be performed with cold stamping and other types of deep pressure; poor cutting steel; spot welding and welding am welding effect is good, after welding must be carried out after heat treatment; high corrosion resistance in the atmosphere; easy to produce intergranular corrosion in the corrosive medium, so it is for more than 450 should be ud with antioxidant; stable at 750 to 800 DEG C in hot air.
It belongs to 1Cr13 ferrite and martensite is ud in stainless steel, after quenching and tempering; in order to improve the wear resistance of parts, fatigue performance and corrosion resistance can be nitriding, cyanidation; quenching and polishing in wet air, steam, fresh water, a water, tap water and adequate corrosion resistance, stability good nitrate at room temperature; anti-oxidation stability under the temperature of 750 DEG C. High plasticity under annealing state of deep drawing steel, steel, stamping, bending, flanging cold processing; welding and arc welding results are satisfactory;
cutting is good, excellent polishing performance; steel after forging and cold tempering should be carried out immediately.关于春节的句子
2Cr13 it belongs to martensitic stainless steel. It is ud after quenching and tempering. It can be ud to improve the wear resistance, corrosion resistance, fatigue property and corrosion resistance of steel. It can be nitrided and cyaniding. The strength of steel after quenching and tempering
The hardness is higher than that of 1Cr13 steel, the corrosion resistance and heat resistance are slightly lower, and the oxidation resistance is still stable in the air medium under the temperature of 700 degrees celsius. The weldability of steel and the plasticity under annealing condition are not comparable to tho of 1Cr13,
But still satisfied; good machinability; excellent polishing performance; steel should be cooled after forging and tempered immediately.转述句怎么改
3Cr13 it belongs to martensitic stainless steel. It is ud
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