The function of camshaft of Leng Jizhu iron reachs application

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  • source:TAMIKO CNC Machining
Product of Leng Jizhu iron, euramerican country is in early on the century has begun to develop at the beginning of 20 time, popularize extensively at 6, seventies, 80 time technology matures completely. Product of Leng Jizhu iron with its low cost, high-powered marked characteristic, apply extensively on internal-combustion engine. Camshaft is a medium essential important component part in internal-combustion engine compressed air distribution mechanism, its action is the movement that controls spiracle, mix by certain working sequence and time open shut, because this is right,its ask that this must have admirable wearability. Home's commonly used now camshaft uses surface of medium carbon steel to quench with ball iron isotherm quenchs wait for craft to make and become. Be in abroad, there is 43% in internal-combustion engine industry -- 47% gasoline engine, diesel engine uses Leng Jizhu iron to regard camshaft as material, leng Jizhu iron regards camshaft as generally material with its low cost, high-powered marked characteristic, received wide application. One, the function of camshaft of Leng Jizhu iron and the carbide that because have tall hardness,apply Leng Jizhu iron are organized and have good anti-wear properties and fight abrade sex. The white mouth layer in Leng Jizhu iron is Lai body organization, the mechanical mixture that is pearlite and carbide falls in normal temperature, because contain many carbide, it has effect of a framework. Hardness is taller, and the ball light in Lai body reachs oil storage action since body. The Lai body wearability of this lever, reduce the cause that grinds gender and oil storage sex, get take seriously generally and applied in internal-combustion engine industry. 2, technical parameter and craft Lengji are cast-iron camshaft is the alloying element that adds certain amount on HT250 foundation, shape to craft is cast and be become through be being cast specially. The affiliation of alloying element improved camshaft matrix hardness and integrated and mechanical performance, raise wearability greatly, through using Lengji cast-iron wear extent is 45# steel and camshaft of ball iron other only 12% the left and right sides. 1, HRC48 of B>250N/mm2 2 of ó of mechanical function tensile strength, hardness -- is deepness of layer of 54 3, wear-resisting amounted to? 6 -- 10mm 3, use isotherm to quench as a result of the nodular cast iron that uses at present and 45# steel or high frequency quench acquire martensite organization. After high speed runs, cam peach pointed place appears inchoate wear away, and Leng Jizhu iron is used shape specially craft, do not require heat treatment. Each place can get camshaft namely requires different hardness cost. The wear extent of peach pointed place is the 1/7 of nodular cast iron and 45# steel only, have at the same time reduce finished cost, increase the good point such as economy. CNC Milling CNC Machining