沧州地区春节前期方管价格将不再变动厂家大…方管沧州方管市场价格持稳。市场方面：春节将至，方管厂家大多陆续放假，全国物流公司也陆续停运，市场成交偏差，不少方管厂家也基本完成节前补货操作。据方管厂家反馈今日沧州地区各 方管厂家到90辆货车，约2万多吨货物。据悉沧州地区各方管厂家在本周五开使陆续放假，市场基本不在成交。故此综合来看，沧州地区…

镀锌方管热处理的十个要点：一、镀锌方管及夹具在热处理前均应清除油污、残盐、油漆等外来物;二、在真空炉中首次使用的夹具，应预先在不低于工件所要求的真空度下进行除气净化处理;三、在热处理过程中易变形工件，应在专用夹具上进行加热。预热的方法有：一次预热为800℃，二次预热为500-550℃和850℃，一次预热升温度速度应限制;

Ten key points for heat treatment of galvanized square tubes are as follows: 1. Before heat treatment, galvanized square tubes and fixtures should remove foreign substances such as oil, residual salt and paint; 2. Fixtures first used in vacuum furnaces should be degassed and purified in advance at the vacuum required by the workpiece; 3. Workpieces easily deformed during heat treatment should be heated on special fixtures. The preheating methods are as follows: primary preheating is 800 C, secondary preheating is 500 - 550 C and 850 C, and the speed of primary preheating should be limited. 四、对于形状复杂或截面有急剧变化以及有效厚度较大的工件，应进行预热;五、有凹槽不通孔的工件、铸件和焊接件以及加工成形的不锈钢工件，一般不宜在盐浴炉中加热;六、镀锌方管加热应有足够的保温时间，可根据工件有效厚度和条件厚度(实际厚度乘以工件形状系数);

4. For workpieces with complex shapes or sharp changes in cross sections and large effective thickness, preheating should be carried out; 5. Workpieces with grooves and no through holes, castings and welds, and stainless steel workpieces processed and formed, generally, should not be heated in a salt bath furnace; 6. Galvanized square tubes should be heated with sufficient holding time, which can be multiplied by the effective thickness and conditional thickness of the workpiece (actual thickness multiplied by workpiece thickness). Shape coefficient;

七、马氏体不锈钢和耐热钢镀锌方管淬火冷至室温后方可进行清洗、深冷处理或回火，焊接和其后的热处理之间的时间间隔不应超过4小时;八、根据镀锌方管要求和表面状况采用碱洗、水溶性清洗剂、氯溶剂喷砂，喷丸等方法进行清理;九、矫正后应在低于原回火温度下进行去应力退火，形状复杂或尺寸要求严格工件，矫正后在回火时用定形夹具结合回火进行矫正;十、当镀锌方管力学性能不合格时，可重复热处理，但重复淬火或固溶次数一般不超过二次。镀锌方管的补充回火不算作重复处理。淬火状态或低温回火后的马氏体不锈钢和耐热钢工件，重复淬火前应进行预热，退火或高温回火。

7. After quenching and cooling to room temperature, galvanized square tubes of martensitic stainless steel and heat-resistant steel can be cleaned, cryogenically treated or tempered. The time interval between welding and subsequent heat treatment should not exceed 4 hours. 8. According to the requirements and surface conditions of galvanized square tubes, alkali washing, water-soluble cleaning agent, chlorine solvent sandblasting, shot blasting and other methods should be used for cleaning. 9. After rectification, the temperature should be lower than the original tempering temperature. Stress-relief annealing is carried out under the degree of stress, and the workpiece with complex shape or strict size is required. After correction, the workpiece is corrected by setting fixture combined with tempering when tempering. 10. When the mechanical properties of galvanized square tubes are not up to standard, heat treatment can be repeated, but the number of repeated quenching or solid solution does not exceed twice. Supplementary tempering of galvanized square tubes is not regarded as repetitive treatment. Martensitic stainless steel and heat-resistant steel workpieces after quenching or low temperature tempering should be preheated, annealed or tempered at high temperature before repeated quenching.

广州镀锌方管价格明显下跌厂家产量逐渐增加…方管本周广州市场镀锌方管价格明显下跌，整周出货量整体偏弱，普遍日均出货1500吨以内。期货方面本周走势整体先抑后扬，唐山普碳方坯 含税出厂3030元/吨，较上周同期累降80元。据统计本周唐山主要仓库方管库存较上周同期降12.9%。现货市场方面广州镀锌方管本周走势整体呈弱势震荡， 价格明显下跌，出货较为疲软，成交不畅。本周初… 武汉方管价格弱势盘整运行整体出货表现仍一…方管本周武汉方管价格较上周小幅下跌。市场方面：本周本地9.5-11.75mm普卷的资源依旧稀缺，现报价在3990元左右。5.75-11.5mm低合金板4100元左右，市场价格分化明显。另外，本周线上武钢投放的2.1-8mm普卷订单锁价3860元，很快被抢光。成交方面，据了解，本周零售成交较上周稍好，部分终端年底备货。但总的来说，现处于需求萎缩期…