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Annealing,normalized, quenching, tempering… Do you know the difference of all this heat treatment ways? The role of heat treatment is to improve the mechanical properties of materials, eliminate residual stress and improve the cutting effency.According to different purposes, Heat treatment process can be divided into two types: preparing heat treatment and final heat treatment. 1.Preparing heat treatment The purpose of pre-heat treatment is to improve processing performance, eliminate internal stress, and prepare good gold -phase tissue for final heat treatment,which include annealing, normalizing, aging treatment etc. 1) Annealing and Normalizing Annealing and normalizing are used for Hot working blanks….

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Wear is the main problem when people use the wear resistant steel plate,wear will cause the wear resistant steel plate service life shorter.Do you know what is the main wear type of wear resistant steel plate and how to avoid the wear? The most common wear is  sliding wear,the second type is impact wear,and another type  is extrusion wear caused by the interaction of two or more grinding bodies on the surface of wear-resistant steel plates. Different wear type with different impacts on the service life of products. 01 Sliding wear  Sliding wear, same as sliding friction wear, refers…

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Privacy Policy of Shandong Dajin Metal Material Co., LTD. Shandong Dajin Metal Material Co., LTD. operates the Website Name website, which provides the SERVICE. This page is used to inform website visitors regarding our policies regarding the collection, use, and disclosure of Personal Information if anyone decides to use our Service, the Website’s Name website. If you choose to use our Service, then you agree to the collection and use of information in relation to this policy. The Personal Information that we collect is used for providing and improving the Service. We will not use or share your information…

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Cold drawn steel is known for its high precision and good surface quality. Shandong Dajin Metal Material Co.,ltd. ‘s cold drawn steel tolerances are in accordance with ISO standards and the best tolerances are -0.02MM.

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The new packaging of cold drawn steel rod As we all know that cold drawn steel rod easy to rust during shipment,especially during the ocean shipment.In order to avoid the rust and damage packaging,our production department re-design the packaing of our cold dran steel rod.The ref. pictures as follow: The Maximum weight each bundle is 1000kg,One sling for each bundle for easy loading and unloading of forklifts.Effective protection of cold drawn steel packaging not damaged during transportation and handling.

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303Cu free-cutting steelis mainly used for the production of instruments, instruments, watch parts, automobiles, machine tools and other various machines with small force and strict requirements on size and finish. Requirements for dimensional accuracy and finish. Strict, standard parts with relatively low mechanical performance requirements, such as gears, shafts, bolts, valves, bushings, pins, pipe joints, spring seat cushions, etc., and machine tool screws, plastic molding dies, surgical and dental surgical instruments Wait. 303Cu stainless steel bar: It is easier to cut than 304 by adding Cu element and a small amount of sulfur and phosphorus. Other properties are similar…

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In the field of automotive parts, in order to improve the cutting efficiency, 1144 free-cutting steel containing of lead (0.04% to 0.30%) is often used. Japan’s annual output exceeds 500,000 tons. However, in recent years, the environmental protection wave in the world has put forward strong requirements for reducing the use of toxic heavy metal lead, so it is necessary to develop a lead-free cutting steel. The 1144 free-cutting steel features a significant improvement in the cutting process (ie disconnection) and the life of tools such as tools and drills. Another type of sulfur-free cutting steel has the effect…

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It is known that elements for improving the machinability of steel include S, Pb, Se, Te, Bi, Ca, Ti, and the like. The mechanical structure uses a large amount of sulfur-containing free-cutting steel for the production of automobile-centered machinery industry. This is because the steel has excellent machinability and is relatively inexpensive, so the economic efficiency is good. Today, Shandong Dajin Metal Material Co.,Ltd. came to talk with everyone about the development trend of free-cutting steel. Shandong Dajin Metal Material Co.,Ltd. specializes in the production and operation of cold drawn free-cutting steel rod. The products are sold to many…

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Cold-rolled seamless pipe is a cold-drawn or cold-rolled precision seamless steel pipe with high dimensional accuracy and good surface finish for mechanical structures and hydraulic equipment. Seamless steel tubes are divided into two types: hot rolled and cold rolled （cold drawn) seamless steel tubes. Cold rolled （cold drawn) seamless pipe is divided into general steel pipe, low and medium pressure boiler steel pipe, high pressure boiler steel pipe, alloy steel pipe, stainless steel pipe, petroleum cracking pipe, other steel pipes, and also includes carbon thin-walled steel pipe and alloy thin-walled steel pipe. Stainless steel thin-walled steel pipe and special-shaped…

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