Rustfri stål produktion materialer

Due to different uses, each product has different processing techniques and quality requirements for raw materials. Generally speaking, different types of stainless steel products require different thickness tolerances for raw materials, such as Class II tableware and insulation cups. The thickness tolerance is generally high, ranging from -3 percent to 5 percent . For Class I tableware, the thickness tolerance is generally -5 percent , for steel pipes -10 percent , for hotel refrigerators -8 percent , and for distributors, the thickness tolerance is generally between -4 percent and 6 percent . At the same time, the differences in product sales both domestically and internationally can also lead to different customer requirements for raw material thickness tolerances. Generally, customers of export products have higher requirements for thickness tolerance, while domestic enterprises have relatively lower requirements for thickness tolerance (mostly due to cost considerations), with some customers even requiring -15 percent .
① DDQ (deep drawing quality) material: refers to a material used for deep drawing (drawing), also known as soft material. The main characteristics of this material are high elongation ( Greater than or equal to 53 percent ), low hardness ( Less than or equal to 170 percent ), internal grain grade between 7.0 and 8.0, and excellent deep drawing performance. The processing ratio (BLANKING SIZE/product diameter) of many enterprises producing Vacuum flask and pans is generally high, and their processing ratios are 3.0, 1.96, 2.13 and 1.98 respectively. SUS304DDQ materials are mainly used for products with high processing ratios. Of course, products with a processing ratio exceeding 2.0 generally require several passes of stretching to complete. If the raw material extension cannot be achieved, the product is prone to cracking and pulling through during the processing of deep drawn products, which affects the qualified rate of the finished product and increases the cost of the manufacturer;
② Generelt materiale: hovedsageligt brugt til materialer andet end DDQ formål. Karakteristika for dette materiale er relativt lavt forlængelse ( Større end eller lige til 45 procent ), relativt højt hårdhed ( Mindre end eller lige til 180HB), og intern korn størrelse klasse mellem 8.0} og 9.0. Sammenlignet med DDQ materialer, dens dyb tegning ydeevne er relativt dårligt. Det er hovedsageligt brugt til produkter der kan opnås uden strækning, sådan som skeer, gafler, elektrisk apparater, stål rør, etc. af en type af service. Men it har en fordel sammenlignet med DDQ materialer, som er det det dens BQ egenskaber er relativt bedre, hovedsageligt skyldes dets s lidt højere hårdhed.
Rustfri stål plade er en lavpris materiale, men kunder har meget høje krav til dens overflade kvalitet. Under produktion proces af rustfri stål plader, forskellige defekter sådan som ridser, gruber, sand huller, mørke linjer, folder, og kontaminering er uundgåelige. As a resultat, overflade kvalitet defekter sådan som ridser og folder er er ikke tilladt i højkvalitets materialer, og defekter sådan som som gruber og sand huller er også ikke tilladt i skeer, skeer, gafler, og produktion fordi it er vanskelig at fjerne dem under polering. Det er nødvendigt at bestemme overfladen kvalitet niveau baseret på graden og hyppighed af forskellige overflade defekter, i rækkefølge til bestemme produktet grad.